Goldhorn P3 DSPA Plus | Previous Display
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Goldhorn P3 DSPA Plus
Display Model Opportunity: Professional-Grade Performance at Exceptional Value
This Goldhorn P3 DSPA Plus represents a rare opportunity to acquire a flagship 20-channel DSP/amplifier/player at exceptional value. This is a brand new, 100% complete unit that was used as a display model and sustained cosmetic damage to the outer shipping box only—the product itself, all components, accessories, and packaging are in pristine factory-new condition.
The unit has never been installed, never been powered, never been used beyond display purposes. All protective films, accessory bags, and factory seals remain intact. The only difference between this unit and a standard retail unit is the condition of the outer shipping carton. Everything else—the product, manual, accessories, warranty—is exactly as it would be from the factory.
This display model carries the full manufacturer warranty with no exceptions or limitations. Goldhorn stands behind this unit with the same comprehensive coverage provided to all P3 DSPA Plus customers. The damaged shipping box is purely cosmetic and does not affect product function, longevity, or warranty status in any way.
- Condition: Brand new, factory-fresh unit with damaged outer shipping box only
- Usage History: Display model only—never installed, never powered beyond testing, never used
- Completeness: 100% complete with all accessories, cables, manuals, protective films intact
- Warranty: Full manufacturer warranty with no limitations—identical to standard retail units
- Functionality: Zero compromise—damaged box does not affect product performance or longevity
- Value Opportunity: Flagship 20-channel DSP/amplifier/player at reduced pricing due to cosmetic box damage
For the discerning enthusiast planning a multi-channel high-end system, this display model presents an exceptional value proposition: acquire Goldhorn's most advanced all-in-one unit with professional ADAU1463 DSP processing, 10-channel Class D amplification (8×80W + 2×150W), hi-res DSD playback up to 256, and comprehensive connectivity—all with full warranty coverage—at pricing that reflects only the cosmetic shipping box condition rather than product quality.
Product Overview: 20-Channel All-in-One Digital Powerhouse
The Goldhorn P3 DSPA Plus represents a pioneering marvel meticulously designed for discerning 20-channel car audio enthusiasts who demand professional-grade performance without the complexity of multiple separate components. This all-in-one digital powerhouse integrates four critical system functions into a single chassis: professional DSP processing, powerful multi-channel amplification, hi-res digital playback, and comprehensive connectivity—eliminating the rack of equipment traditionally required for high-end multi-way active systems.
What Makes the P3 DSPA Plus Unique
In traditional high-end car audio installations, achieving 20-channel processing capability requires assembling multiple separate components: a digital signal processor for crossovers and tuning, multiple amplifiers to power the channels, a high-resolution source unit or media player, and extensive wiring to interconnect everything. The P3 DSPA Plus consolidates this entire signal chain into one integrated unit, dramatically simplifying installation while maintaining—and in many cases exceeding—the performance of component-based systems.
The ADAU1463 DSP chip at the heart of the P3 DSPA Plus provides professional-grade signal processing capability typically found in studio equipment and high-end home audio processors. With 20-channel processing capability, 31-band parametric EQ per channel, advanced crossover options (Butterworth, Bessel, Linkwitz-Riley filters), time alignment with 0.02ms precision, and sophisticated phase management, the P3 DSPA Plus delivers the tools serious competitors and audiophiles demand.
The integrated 10-channel Class D amplifier—outputting 80 watts per channel for eight channels plus 150 watts per channel for two channels—provides sufficient power for complete multi-way front stage installations (tweeters, midranges, midbass) plus subwoofer channels or rear fill, all from a single chassis. Class D topology ensures high efficiency (minimal heat generation) and excellent sound quality with THD+N <0.02% and signal-to-noise ratio >100dB.
The built-in hi-res audio player supports DSD up to 256 (DFF/DSF formats) plus lossless formats including WAV, FLAC, APE, and AIFF up to 192kHz/32-bit resolution. Three USB host ports enable connection of multiple storage devices, while USB-DAC functionality allows the P3 DSPA Plus to function as an external sound card for laptops. Bluetooth 5.0 with aptX, AAC, and SBC codecs provides high-quality wireless streaming.
The result is a complete active system brain that handles everything from source playback through final amplified output, all within a single compact chassis that can be mounted under seats, in trunks, or behind dash panels—dramatically simplifying what would otherwise require multiple rack-mounted components and extensive custom wiring.
- 20-Channel DSP Processing: ADAU1463 professional-grade chip with 31-band parametric EQ per channel
- 10-Channel Class D Amplification: 8×80W + 2×150W (880W total) with THD+N <0.02%
- Hi-Res Audio Playback: DSD256, WAV, FLAC, APE, AIFF up to 192kHz/32-bit resolution
- Comprehensive Connectivity: 12 high-level inputs, 2 RCA inputs, 12 RCA outputs, Bluetooth 5.0, Wi-Fi control
- Professional Tuning Tools: PC software, mobile app, optional wired display controller
- All-in-One Integration: Replaces separate DSP, amplifiers, and media player with single chassis solution
Complete Technical Specifications
| DSP Processing (ADAU1463 Professional-Grade Chip) | |
|---|---|
| DSP Chip | ADAU1463 (Analog Devices professional audio DSP) |
| Processing Channels | 20 channels (full independent processing per channel) |
| Parametric EQ | 31 bands per channel with independent adjustment (±15dB in 0.1dB steps) |
| Input EQ | 5-band parametric EQ + delay pre-adjustment per input |
| Crossover Filters | Butterworth, Bessel, Linkwitz-Riley (6/12/18/24/36/48 dB/octave slopes) |
| Time Alignment | Up to 20ms delay per channel (0.02ms precision steps) |
| Phase Control | Variable phase rotation with advanced phase management algorithms |
| Dynamic Range | >110dB (professional-grade performance) |
| Amplifier Specifications (10-Channel Class D) | |
|---|---|
| Amplifier Type | Class D (high efficiency, minimal heat generation) |
| Total Channels | 10 channels (8 channels @ 80W + 2 channels @ 150W) |
| Power Output (Channels 1-8) | 80 watts RMS per channel @ 4Ω (640W total for 8 channels) |
| Power Output (Channels 9-10) | 150 watts RMS per channel @ 4Ω (300W total for 2 channels) |
| Total System Power | 880W RMS + 2×150W = 940W total amplifier output |
| THD+Noise | <0.02% (exceptionally low distortion) |
| Signal-to-Noise Ratio | >100dB (excellent noise floor) |
| Frequency Response | 20 Hz - 40 kHz (extended range for hi-res audio) |
| Damping Factor | >200 (excellent speaker control) |
| Hi-Res Audio Player Specifications | |
|---|---|
| DSD Support | DFF/DSF formats up to DSD256 (11.2MHz sampling rate) |
| Lossless Formats | WAV, FLAC, APE, AIFF up to 192kHz/32-bit resolution |
| Compressed Formats | MP3, WMA, AAC (all common bitrates supported) |
| USB Host Ports | 3 USB host ports (connect multiple storage devices simultaneously) |
| USB-DAC | 192kHz/32-bit (functions as external sound card for laptops) |
| Bluetooth Version | 5.0 (latest standard with improved range and stability) |
| Bluetooth Codecs | aptX (high quality), AAC (Apple devices), SBC (universal) |
| Phone OTG Function | Yes (connect Android devices via USB for direct playback) |
| Input/Output Configuration | |
|---|---|
| High-Level Inputs | 12 channels (speaker-level signal acceptance from factory or aftermarket head units) |
| RCA Inputs (AUX) | 2 channels (line-level input for external sources) |
| Input Sensitivity (RCA) | 4V maximum (adjustable for various source levels) |
| Input Sensitivity (High-Level) | 24V maximum (works with high-power factory amplifiers) |
| RCA Outputs (Pre-Amp) | 12 channels @ 6V (for external amplifiers or subwoofer amplifiers) |
| High-Level Outputs | 10 channels (direct speaker connection without external amplifiers) |
| Amplified Outputs | 10 channels (8×80W + 2×150W integrated amplification) |
| Remote Turn-On Output | Yes (trigger external amplifiers and accessories) |
| Control and Connectivity | |
|---|---|
| Wi-Fi Control | Yes (mobile app control for wireless tuning and operation) |
| PC Software | Comprehensive Windows application for detailed configuration and tuning |
| Mobile App | iOS and Android compatible (wireless control and tuning) |
| Wired Display Controller | Optional IPS display panel with physical controls (sold separately) |
| Steering Wheel Control | Yes (integration with factory steering wheel controls) |
| Electrical and Physical Specifications | |
|---|---|
| Operating Voltage | 11V - 16V DC (standard automotive electrical system) |
| Current Draw (Standby) | <50mA (negligible parasitic drain) |
| Protection Systems | Intelligent EPS (short circuit, thermal, over-voltage, reverse polarity protection) |
| Dimensions (L × W × H) | Compact all-in-one chassis (specific dimensions in installation manual) |
| Mounting | Under-seat, trunk, or custom rack mounting with included hardware |
| Operating Temperature | -20°C to +70°C (-4°F to 158°F) wide range for automotive environments |
Professional DSP Processing: ADAU1463 Chip Performance
The heart of the P3 DSPA Plus is the ADAU1463 DSP chip from Analog Devices—a professional-grade digital signal processor used in studio equipment, professional sound reinforcement systems, and high-end consumer audio products. This is not a generic automotive DSP; it's a true professional tool adapted for car audio applications, bringing studio-grade processing power to automotive environments.
31-Band Parametric EQ: Surgical Precision Tuning
Each of the 20 output channels features an independent 31-band parametric equalizer with ±15dB adjustment in 0.1dB steps. Unlike graphic EQs with fixed frequency centers, parametric EQs allow you to select exact center frequencies, adjust bandwidth (Q factor), and apply boost/cut with surgical precision. With 31 bands available, you can address specific resonances, compensate for speaker response irregularities, and sculpt tonal balance with exceptional detail.
The 0.1dB adjustment steps enable subtle corrections that graphic EQs cannot achieve. When addressing a narrow resonance peak at 2.3kHz that requires -3.7dB attenuation with a Q of 4.5, the P3 DSPA Plus provides exactly those parameters—no compromises, no "close enough" solutions. This precision is essential for competition-level tuning where 0.5dB differences are audible and measurable.
Advanced Crossover Architecture
The P3 DSPA Plus offers multiple filter topologies—Butterworth, Bessel, and Linkwitz-Riley—with slopes ranging from 6 dB/octave to 48 dB/octave. Each topology has distinct sonic characteristics:
- Butterworth: Maximally flat passband response (no ripple), steeper rolloff than Bessel, moderate transient behavior—general-purpose choice for most applications
- Bessel: Linear phase response (preserves waveform shape), gentler rolloff, excellent transient response—preferred for maintaining sonic coherence in critical listening
- Linkwitz-Riley: Summed response is flat (drivers combine for perfect reconstruction), symmetrical rolloff, most common in professional audio—ideal for two-way and three-way active systems
The ability to select filter topology and slope independently per crossover point allows advanced tuners to optimize each driver's behavior. A tweeter might use Butterworth 24dB/octave for aggressive high-pass protection, while the midbass uses Linkwitz-Riley 12dB/octave for smoother integration with the midrange. The P3 DSPA Plus provides the flexibility professionals demand.
Time Alignment with 0.02ms Precision
Every millisecond of delay equals approximately 13.5 inches of acoustic path length difference (at sea level, 70°F). The P3 DSPA Plus provides up to 20ms delay per channel (equivalent to 270 inches or 22.5 feet of path length compensation) with 0.02ms precision steps. This allows alignment accuracy within 0.27 inches—far exceeding the resolution required for proper time alignment in even the most extreme off-axis listening positions.
In practical terms, this means you can compensate for the physical distance differences between a tweeter mounted in the A-pillar (60 inches from listener's ears) and a midbass in the door (36 inches from listener's ears) by adding 1.78ms of delay to the tweeter channel. The result is acoustic arrival time alignment that creates a coherent soundstage and proper tonal balance regardless of driver physical locations.
Phase Management and Advanced Algorithms
Beyond basic crossover and EQ functions, the ADAU1463 chip enables sophisticated phase management including variable phase rotation per channel and phase compensation algorithms that address the complex phase relationships created by speaker drivers, crossovers, and acoustic reflections. These advanced tools allow professional tuners to achieve phase coherence across the audio spectrum—critical for maintaining timbral accuracy and soundstage depth.
31-Band Parametric EQ
Surgical precision tuning: ±15dB adjustment in 0.1dB steps per band. Select exact frequencies, adjust Q factor, apply precise boost/cut. 31 bands per channel enable addressing specific resonances and response irregularities with exceptional detail.
Advanced Crossovers
Multiple filter topologies: Butterworth, Bessel, Linkwitz-Riley with 6-48 dB/octave slopes. Each topology has distinct sonic characteristics—choose based on application requirements and sonic goals.
Time Alignment
0.02ms precision steps: Up to 20ms delay per channel equals 270 inches path length compensation. Align acoustic arrival times for coherent soundstage and proper tonal balance regardless of driver locations.
Phase Management
Advanced phase control: Variable phase rotation per channel with sophisticated compensation algorithms. Address complex phase relationships for coherent response across the audio spectrum.
Integrated 10-Channel Class D Amplification
The P3 DSPA Plus houses a powerful 10-channel Class D amplifier delivering 80 watts RMS per channel for eight channels plus 150 watts RMS per channel for two channels—totaling 940 watts RMS of integrated amplification. This power envelope is sufficient for complete multi-way front stage installations (tweeters, midranges, midbasses) plus dedicated subwoofer channels or full-range rear fill, all from a single integrated chassis.
Why Class D Topology Matters
Class D amplification (also called "switching amplifiers") achieves exceptional efficiency (typically 85-95%) compared to traditional Class A/B designs (50-70% efficiency). This efficiency advantage translates to minimal heat generation—critical when packaging 940 watts of amplification into a compact chassis. The P3 DSPA Plus can be mounted under seats or in trunk spaces without requiring massive heatsinks or auxiliary cooling fans that Class A/B amplifiers would demand at these power levels.
Modern Class D designs have overcome the early sonic limitations that plagued first-generation switching amplifiers. The P3 DSPA Plus achieves THD+N <0.02%—lower than many audiophile-grade Class A/B amplifiers—with signal-to-noise ratio exceeding 100dB. The result is amplification that rivals or exceeds traditional topologies while generating far less heat and consuming less electrical current from the vehicle's charging system.
Power Distribution: 8×80W + 2×150W Configuration
The asymmetric power distribution (eight channels at 80W, two channels at 150W) reflects typical multi-channel system requirements:
- Tweeters (2 channels @ 80W): 80 watts is substantial power for high-frequency drivers—most tweeters rated 50-100W RMS receive 20-40W in practice. Headroom ensures clean reproduction without clipping.
- Midranges (2 channels @ 80W): 80 watts drives most 3-4" midranges to high output levels with authority. Competition midrange drivers rated 100-150W RMS work well within their thermal limits.
- Midbasses (2 channels @ 80W): 80 watts into 6.5" or 8" midbass drivers provides strong output for front stage impact. Some enthusiasts may supplement with external amplification for extreme SPL.
- Subwoofer or Rear Fill (2 channels @ 150W): 150W channels ideal for 8" or 10" subwoofers in sealed enclosures, or powerful full-range rear speakers. Bridge capability (if supported) could deliver 300W for single subwoofer.
- Remaining 2 channels @ 80W: Additional flexibility for center channel, height channels, or rear midbass depending on system architecture.
Integration Advantage: No External Amplifiers Required
Traditional multi-channel active systems require separate amplifiers for each speaker pair—a three-way front stage with subwoofer demands four amplifiers (tweeter amp, midrange amp, midbass amp, subwoofer amp) multiplied by two for left/right channels. The rack of equipment, power wiring, signal cables, and installation complexity quickly becomes overwhelming.
The P3 DSPA Plus eliminates the external amplifier rack for systems within its power envelope. Connect speakers directly to the integrated amplifier outputs, route power from a single power wire, and you're done. No more rack-mounting multiple amplifiers, no more multiple RCA cables, no more troubleshooting ground loops between components. The simplicity advantage alone justifies the P3 DSPA Plus for many installations.
When External Amplification Still Makes Sense
For systems requiring power beyond the integrated amplifier's capabilities, the P3 DSPA Plus provides 12 RCA pre-amp outputs at 6V output level. Connect external amplifiers for:
- High-Power Subwoofers: 12" or larger subwoofers demanding 300W+ RMS benefit from dedicated monoblock amplifiers. Use the 150W channels for other speakers and pre-outs for subwoofer amplifier.
- Competition SPL: Maximum output requires amplifiers delivering 150W+ per channel to midbass and midrange drivers. Use P3 DSPA Plus for DSP processing and tweeters, external amps for power-hungry drivers.
- Mixing Integrated and External: Drive tweeters and midranges from integrated channels (where 80W is ample), use pre-outs to drive high-power external amplifiers for midbasses and subwoofers.
The 12 pre-amp outputs match the 12 high-level inputs, enabling passthrough configurations where the P3 DSPA Plus functions as DSP processor and partial amplifier while external amplifiers handle specific channels. This flexibility allows the system to grow as power requirements increase without replacing the core processing brain.
Hi-Res Audio Playback: DSD256 and Lossless Format Support
Beyond DSP and amplification, the P3 DSPA Plus integrates a hi-res audio player capable of reproducing the most demanding audiophile formats. This eliminates the need for external source units or media players, consolidating yet another component into the all-in-one chassis while maintaining uncompromising audio quality.
DSD Format Support: The Audiophile Standard
Direct Stream Digital (DSD) is the audio encoding format used for Super Audio CD (SACD) and preferred by many audiophiles for its smooth, analog-like presentation. Unlike PCM (Pulse Code Modulation) used in CDs and most digital audio, DSD uses 1-bit delta-sigma modulation sampled at very high rates—2.8MHz for standard DSD (DSD64), 5.6MHz for DSD128, 11.2MHz for DSD256.
The P3 DSPA Plus supports DSD up to 256 (11.2MHz sampling rate) in DFF and DSF file formats. This is the highest DSD rate commonly available in commercial recordings, providing resolution that exceeds SACD (which uses DSD64) by 4× the sampling rate. For audiophiles with extensive SACD-ripped libraries or downloads from HD audio sites, native DSD playback ensures bit-perfect reproduction without PCM conversion that can alter sonic character.
Lossless PCM Formats: 192kHz/32-bit Resolution
For PCM-based content, the P3 DSPA Plus supports WAV, FLAC, APE, and AIFF formats up to 192kHz sampling rate and 32-bit depth. This resolution far exceeds CD quality (44.1kHz/16-bit) and matches or exceeds most hi-res download services:
- 96kHz/24-bit: Standard hi-res download resolution from HDtracks, Qobuz, and other services—preserves ultrasonic content and provides extended dynamic range
- 192kHz/24-bit: Highest common resolution for commercial recordings—maximum detail preservation for critical listening
- 192kHz/32-bit: Ultra-high resolution for studio masters and archival recordings—future-proof capability for emerging formats
The lossless compression of FLAC and APE files allows storing large hi-res libraries efficiently (typically 40-60% size reduction vs. WAV) without any sonic compromise. The P3 DSPA Plus decodes losslessly on playback, delivering bit-perfect audio identical to uncompressed WAV files while conserving USB storage space.
Multiple USB Host Ports and USB-DAC Functionality
The P3 DSPA Plus provides three USB host ports, allowing simultaneous connection of multiple storage devices. Load a USB drive with daily listening music, another with audiophile test tracks, and a third with competition demonstration material—all accessible without swapping drives. USB drives up to 2TB are supported (verify filesystem compatibility—FAT32 has 4GB file size limits; exFAT recommended for large files).
The USB-DAC function enables the P3 DSPA Plus to serve as an external sound card for laptops. Connect a laptop via USB, and the P3 DSPA Plus appears as a 192kHz/32-bit audio device. This allows professional tuners to play test signals from measurement software (REW, SmaartLive) through the DSP and amplification chain for in-situ system optimization. The USB-DAC function also enables streaming from laptop-based music services (Tidal, Qobuz) at maximum quality.
Bluetooth 5.0 with aptX Codec Support
Bluetooth 5.0 provides the latest wireless standard with improved range (up to 800 feet in open space vs. 30 feet for older Bluetooth), higher data throughput, and better coexistence with congested RF environments (Wi-Fi, cellular). For car audio applications, this translates to more reliable connections and reduced dropouts in urban areas with dense wireless traffic.
Codec support includes:
- aptX: Near-CD quality wireless audio with minimal compression artifacts—significantly better than standard SBC codec, ideal for Android devices
- AAC: Apple's preferred codec for iOS devices—optimized for iPhone/iPad streaming with good quality and low latency
- SBC: Universal fallback codec supported by all Bluetooth devices—adequate quality for casual listening
While wireless audio cannot match wired hi-res playback for absolute quality, Bluetooth with aptX provides surprisingly good performance for convenience listening, phone calls, and navigation audio.
Comprehensive Connectivity and Control Options
The P3 DSPA Plus provides exceptional input/output flexibility to accommodate diverse system architectures and source configurations. Whether integrating with factory head units, aftermarket source units, or building ground-up systems, the connectivity options enable seamless integration.
12 High-Level Inputs: Factory Integration Mastery
The 12 high-level (speaker-level) inputs allow direct connection to factory head units or amplifiers without requiring line output converters (LOCs). This is critical for modern vehicles with integrated infotainment systems where replacing the factory head unit is impractical or impossible due to integration with vehicle systems (climate control, backup cameras, driver assistance, vehicle settings).
High-level inputs accept signals up to 24 volts—sufficient for high-power factory amplifiers found in premium audio systems (Bose, Harman Kardon, Bang & Olufsen, etc.). The P3 DSPA Plus automatically converts speaker-level signals to line-level for DSP processing, eliminating the signal degradation and noise common with external LOCs.
With 12 inputs available, the P3 DSPA Plus can capture all channels from factory systems with rear seat entertainment, surround sound processing, or dedicated center channels—preserving the original signal routing before applying DSP tuning and amplification.
2 RCA Inputs: Aftermarket Head Unit Integration
For systems using aftermarket head units or external source units, 2 RCA inputs accept line-level signals up to 4V. These inputs provide clean signal paths without the noise and distortion associated with speaker-level signal conversion, ideal for audiophile-focused installations where every link in the signal chain matters.
12 RCA Pre-Amp Outputs: External Amplifier Expansion
The 12 RCA pre-amp outputs @ 6V provide high-voltage line-level signals for driving external amplifiers. The 6V output level offers excellent signal-to-noise ratio even with long cable runs, reducing susceptibility to electrical noise pickup that plagues lower-voltage signals.
These outputs carry DSP-processed signals, enabling hybrid configurations:
- Use integrated amplification for tweeters and midranges where 80W is adequate
- Drive external high-power amplifiers for midbasses and subwoofers using pre-amp outputs
- Create bi-amp or tri-amp configurations where multiple amplifiers drive different frequency ranges to single speakers
- Add external subwoofer amplifier(s) while using all 10 integrated channels for full-range speakers
Control Interfaces: PC Software, Mobile App, Optional Display
PC Software (Windows): Comprehensive tuning application for desktop/laptop computers provides the most detailed configuration interface. Use PC software for initial system setup, advanced tuning, save/load configuration files, and firmware updates. The large screen and mouse interface enable precise cursor control for fine EQ adjustments and crossover parameter entry.
Mobile App (iOS/Android): Wi-Fi-based mobile control allows on-the-fly adjustments from the driver's seat without connecting cables. The mobile app is ideal for quick level adjustments, source selection, and basic EQ tweaks during listening sessions. Advanced tuning is better performed with PC software, but the mobile app provides convenient access to frequently adjusted parameters.
Optional Wired Display Controller: Physical panel with IPS display screen (sold separately) mounts in dashboard or console for permanent physical control. The wired controller provides tactile feedback and visual confirmation without relying on phone/laptop, ideal for users who prefer dedicated hardware over app-based control. Volume knob, source selection, and preset recall are immediately accessible.
- 12 High-Level Inputs: Direct factory head unit integration without LOCs, accepts up to 24V signals
- 2 RCA Inputs: Clean line-level connection for aftermarket source units (up to 4V)
- 12 RCA Pre-Amp Outputs: High-voltage (6V) signals for external amplifier expansion
- 3 USB Host Ports: Multiple storage device connections for extensive music libraries
- USB-DAC: External sound card function for laptop measurement and streaming
- Bluetooth 5.0: aptX/AAC/SBC codec support for high-quality wireless streaming
- Wi-Fi: Mobile app control for wireless tuning and operation
- PC Software: Comprehensive Windows application for detailed configuration
- Optional Display: Physical wired controller with IPS screen for permanent installation
Typical Application: Complete 3-Way Active Front Stage + Subwoofer
The P3 DSPA Plus's 20-channel DSP and 10-channel amplification ideally suits three-way active front stage systems with dedicated subwoofer channels—the configuration favored by serious competitors and audiophiles seeking maximum performance. Understanding how the channels map to this application clarifies the P3 DSPA Plus's value proposition.
Channel Allocation Example
Three-Way Active Front Stage (Left + Right = 6 speakers, 6 amplifier channels):
- Tweeters: Left tweeter (Ch 1 @ 80W), Right tweeter (Ch 2 @ 80W) – High-pass @ 3.5kHz, 24dB/octave Butterworth, EQ for response correction, time aligned for driver offset
- Midranges: Left midrange (Ch 3 @ 80W), Right midrange (Ch 4 @ 80W) – Bandpass 300Hz-3.5kHz, 24dB/octave slopes, EQ for resonance damping, time aligned to tweeters
- Midbasses: Left midbass (Ch 5 @ 80W), Right midbass (Ch 6 @ 80W) – Bandpass 60Hz-300Hz, 12dB/octave slopes, EQ for door panel resonances, time aligned to midrange
Subwoofer(s) - 2 amplifier channels remaining:
- Option A - Dual Subwoofers: Left subwoofer (Ch 9 @ 150W), Right subwoofer (Ch 10 @ 150W) – Low-pass @ 60Hz, 24dB/octave, individual time alignment and phase adjustment for optimal cabin coupling
- Option B - Single Subwoofer + Rear Fill: Single subwoofer (Ch 9 @ 150W), rear full-range (Ch 7-8 @ 80W each), leaving Ch 10 for center channel or height channel
- Option C - External Subwoofer Amp: Use RCA pre-outs for external subwoofer amplifier (300W+ capability), dedicate remaining 4 channels (Ch 7-10) to rear stage or center/height channels
Why Active Three-Way Outperforms Passive Systems
Traditional passive crossover systems place crossover networks between amplifier and speakers, splitting frequency ranges through inductors, capacitors, and resistors. This approach suffers multiple compromises:
- Component Tolerance: Passive components have ±5-10% tolerances—left and right channels never match exactly, compromising stereo imaging
- Driver Interaction: Passive crossovers cannot compensate for driver response irregularities—you get whatever response the driver provides
- Power Loss: Resistors in passive networks dissipate power as heat—often 1-3dB efficiency loss (30-50% power waste)
- Amplifier Damping: Passive crossover impedance between amplifier and driver reduces damping factor—less precise driver control
Active crossover systems like the P3 DSPA Plus eliminate these compromises:
- Digital Precision: DSP crossovers have perfect left/right matching—stereo image is symmetric and stable
- Response Correction: 31-band EQ per driver corrects resonances, peaks, and response irregularities passive systems cannot address
- Zero Power Loss: No resistors dissipating power—every watt from amplifier reaches the driver
- Direct Connection: Amplifier connects directly to driver voice coil—maximum damping factor and control
- Flexible Tuning: Change crossover points, slopes, EQ without replacing components—unlimited optimization iterations
The result is measurably superior performance: flatter frequency response, better transient behavior, improved stereo imaging, lower distortion, and the ability to extract maximum performance from each driver through targeted optimization.
System Advantages vs. Component-Based Installations
✓ All-in-One Advantages
- Consolidation: DSP + amplifiers + hi-res player in single chassis—eliminates rack of separate components
- Professional DSP: ADAU1463 chip with 31-band parametric EQ, advanced crossovers, 0.02ms time alignment precision
- 20-Channel Processing: Complete three-way active systems with subwoofer(s) and rear fill/center channels
- Powerful Amplification: 940W total (8×80W + 2×150W) sufficient for complete multi-way front stage
- Hi-Res Playback: DSD256, 192kHz/32-bit lossless formats—audiophile-grade source without external players
- Simplified Installation: Single power wire, single ground, no rack mounting—dramatically reduced complexity
- No Ground Loops: Integrated design eliminates multiple-component ground loop troubleshooting
- Factory Integration: 12 high-level inputs (24V max) enable direct factory head unit connection
- Expansion Capability: 12 RCA pre-outs @ 6V for external amplifiers when power demands exceed integrated channels
- Multiple Control Options: PC software, mobile app, optional wired display—choose interface based on preference
- Comprehensive Codecs: Bluetooth 5.0 with aptX/AAC/SBC for high-quality wireless streaming
- Display Model Value: Full warranty, pristine unit, exceptional pricing due to cosmetic box damage only
⚠ Considerations
- Power Limitations: 80W per channel adequate for most applications but insufficient for competition SPL (external amps required)
- Fixed Amplification: Cannot upgrade integrated amplifiers independently—external amplification needed for power increases
- Learning Curve: Professional DSP tuning requires knowledge—novices may benefit from professional installation/tuning
- Complexity Investment: 20-channel system represents significant installation complexity—active crossovers require precise tuning
- PC Requirement: Full configuration access requires Windows PC—mobile app provides subset of functionality
- Display Model Condition: Damaged shipping box (cosmetic only)—pristine product inside, but packaging reflects display usage
- Single Subwoofer Power: 150W channels adequate for 8-10" subwoofers; larger subs (12-15") benefit from external amplification
- Cost vs. Basic Systems: Professional-grade DSP/amp/player costs significantly more than entry-level aftermarket head units
Ideal Applications and User Profiles
Perfect For:
- Three-Way Active Systems: Enthusiasts building dedicated tweeter, midrange, midbass configurations with DSP crossovers and individual driver optimization
- Factory Integration Projects: Modern vehicles with integrated infotainment where replacing head unit is impractical—12 high-level inputs enable factory system retention
- Competition Installations: SQ competitors requiring professional-grade DSP tuning tools, precise time alignment, and surgical EQ capability
- Audiophile Enthusiasts: Hi-res audio enthusiasts demanding DSD256 playback, lossless format support, and studio-grade processing
- Multi-Channel Architects: System designers who understand active crossovers and want comprehensive DSP control with integrated amplification
- Simplified High-End: Enthusiasts who want flagship performance without the complexity of multiple amplifiers, DSP units, and media players
- Professional Installers: Shops offering high-end installations where all-in-one design reduces labor hours and simplifies troubleshooting
- Value Seekers: Display model pricing provides flagship performance at reduced cost—perfect for budget-conscious enthusiasts demanding professional tools
Consider Alternatives If:
- Extreme Power Requirements: Competition SPL systems demanding 200W+ per channel benefit from dedicated high-power amplifiers
- Modular Upgrade Path: If planning incremental system upgrades (DSP first, amplifiers later), separate components offer flexibility
- Basic System Needs: Two-way passive systems with single subwoofer don't require 20-channel DSP—simpler solutions more cost-effective
- Plug-and-Play Preference: Enthusiasts wanting simple head unit replacement without DSP tuning may prefer traditional aftermarket receivers
Display Model Warranty and Confidence
This display model Goldhorn P3 DSPA Plus carries the full manufacturer warranty with absolutely no limitations or exceptions. Goldhorn Electronic stands behind this unit with the same comprehensive coverage provided to standard retail units purchased new in sealed boxes. The damaged shipping box is purely cosmetic packaging damage and does not affect warranty status, coverage duration, or claim eligibility in any way.
The warranty covers all aspects of the P3 DSPA Plus including DSP processing, amplifier channels, digital playback functions, connectivity features, and physical construction against defects in materials and workmanship. If any warranty issue arises, Goldhorn will repair or replace the unit exactly as they would for any other P3 DSPA Plus customer—no questions asked about display model status, no reduced coverage, no additional requirements.
Audio Intensity, as an authorized Goldhorn dealer, fully supports this display model with our standard customer service and technical support. We are confident in the product quality and warranty coverage, which is why we offer this unit at reduced pricing based solely on cosmetic box damage rather than any product compromise.
- Full Manufacturer Warranty: No limitations, no exceptions, no reduced coverage—identical to standard retail units
- Brand New Product: Never installed, never powered (beyond testing), never used—pristine factory condition
- 100% Complete: All accessories, cables, manuals, protective films, mounting hardware included
- Authorized Dealer Support: Audio Intensity provides full technical support and service coordination
- Damaged Box Only: Cosmetic shipping carton damage does not affect product function, longevity, or reliability
- Exceptional Value: Flagship 20-channel DSP/amp/player at reduced pricing—uncompromised performance at display model pricing
Final Recommendation
The Goldhorn P3 DSPA Plus represents a rare convergence of professional-grade capability and all-in-one convenience that addresses a specific but significant niche: serious multi-channel enthusiasts who demand flagship DSP performance, comprehensive amplification, and hi-res audio playback without the complexity, cost, and installation challenges of component-based systems.
For the three-way active system builder planning dedicated tweeter, midrange, and midbass configurations with independent DSP tuning and amplification, the P3 DSPA Plus provides everything needed in a single chassis: 20-channel ADAU1463 DSP processing with 31-band parametric EQ and advanced crossovers, 10-channel Class D amplification delivering 940W total output, hi-res audio playback supporting DSD256 and 192kHz/32-bit lossless formats, and comprehensive connectivity with 12 high-level inputs, 12 RCA pre-outs, Bluetooth 5.0, and Wi-Fi control.
This display model opportunity makes the value proposition even more compelling. Acquire a brand new, factory-fresh unit with full manufacturer warranty at pricing that reflects cosmetic shipping box damage rather than product quality. The P3 DSPA Plus inside the damaged box is identical to units shipping in pristine packaging—same professional DSP, same powerful amplification, same hi-res playback capability, same comprehensive connectivity, same warranty coverage.
For enthusiasts who have been contemplating a flagship DSP/amplifier/player but hesitated due to cost, this display model represents the perfect entry point. For existing system owners considering upgrades from component-based architectures to integrated solutions, the P3 DSPA Plus offers the simplification and consolidation that makes high-end systems more manageable while maintaining—and often exceeding—the performance of separate components.
The professional DSP tools—31-band parametric EQ with 0.1dB steps, multiple filter topologies, 0.02ms time alignment precision, advanced phase management—provide the surgical tuning capability that competition-level systems demand. The integrated amplification eliminates the amplifier rack while delivering sufficient power for complete multi-way front stages. The hi-res playback capability ensures source quality matches system capability.
Purchase with confidence if you're building or upgrading to three-way active systems, integrating with factory head units in modern vehicles, or seeking simplified high-end performance. This display model delivers flagship capability with full warranty at exceptional value—the damaged box is cosmetic; the performance inside is uncompromised.
Goldhorn P3 DSPA Plus | Previous Display
Frequently Asked Questions
Are these items authentic, and why are the prices so low?
This sale includes demo units we've used for customer demonstrations since 2016, new-old-stock from discontinued product lines, display models from trade shows, and carefully curated inventory we've collected over nearly a decade. Most items include original packaging where available.
What types of items are included in the relocation sale?
Our relocation sale includes demo units we've used for customer demonstrations, new old stock from discontinued product lines, and display models from trade shows. All items are genuine products from top car audio brands - we're simply clearing inventory we can't take to our new location. Items range from amplifiers and speakers to processors and accessories accumulated over nearly 10 years at this location.
Do sale items come with manufacturer warranties?
Warranty coverage varies by item and condition. New old stock items typically include full manufacturer warranty if still valid. Demo and display items may have limited or no manufacturer warranty remaining. We clearly state warranty status in each product description. All sales are final on relocation sale items.
How does shipping work for relocation sale items?
We ship relocation sale items using the same careful packaging methods as our regular inventory. Shipping costs are calculated at checkout based on size and weight. For multiple item purchases, we'll combine shipping where possible to save you money. Large items like subwoofer boxes may require freight shipping with additional costs.
Can I return or exchange relocation sale items?
All relocation sale items are sold as-is with no returns or exchanges. We encourage local pickup customers to inspect items before purchasing. For shipped items, we provide detailed descriptions and photos. Since we're relocating, we cannot accommodate returns or warranty service after the sale period ends.