Image Dynamics SQ600.1D 600W Mono Block Amplifier | Previous Demo
Professionally Maintained Demo Units
Every demo unit has been carefully maintained by our certified technicians. These aren't customer returns or damaged goods - they're the same high-quality equipment we've used to demonstrate premium sound to our customers for years.
Pre-Tested & Verified
Unlike typical clearance sales, every item has been tested and verified by our technical team. We stand behind the quality of our relocation inventory.
Everything Must Go Pricing
These aren't regular sale prices - this is genuine "moving warehouse" pricing. Discounts you simply won't find under normal retail circumstances.
Trade Show Display Models
Many items are pristine display models from major audio trade shows - equipment that's been seen but never installed. These pieces often include special editions or limited releases not available through regular retail channels.
Image Dynamics SQ600.1D
600W Monoblock Amplifier
International Rectifier® Class-D Precision • 1-Ohm Stable • Digital Sound Optimization
Hand-Built American Sound Quality Engineering Since 1992
USA Engineering Excellence
Since 1992, Image Dynamics has been the leader in advanced sound quality engineering. Founded by car audio enthusiasts who refused to compromise, every product embodies decades of competition-winning expertise and American craftsmanship.
Competition Proven
Image Dynamics dominated SQ (Sound Quality) competitions throughout the '90s with revolutionary horn-loaded compression drivers. That same obsessive attention to sonic accuracy flows through every SQ Series amplifier.
Hand-Built Quality
Located in Ontario, California, Image Dynamics hand-builds some of the industry's most sought-after sound quality components one by one. When you buy Image Dynamics, you're supporting American audio manufacturing excellence.
Why Sound Quality Enthusiasts Choose the SQ600.1D
The SQ Series isn't about maximum wattage bragging rights—it's about clean, accurate, distortion-free power delivery. International Rectifier® chipsets, digital sound optimization, and precision engineering deliver the transparent amplification serious audiophiles demand.
International Rectifier® Chipset
Built around premium International Rectifier® MOSFETs—the gold standard for Class-D amplification. These chips deliver exceptional efficiency (less heat, more power), ultra-low distortion (<0.4% THD), and rock-solid reliability even under punishing 1-ohm loads.
Digital Sound Optimization
Proprietary DSO circuitry analyzes and corrects signal path anomalies in real-time, ensuring the amplifier reproduces exactly what your source sends—nothing added, nothing taken away. The result is transparent, reference-quality amplification.
40-Click Precision Controls
Industry-leading 40-detent rotary controls eliminate tuning guesswork. Set your subsonic filter, low-pass crossover, and bass frequency with surgical precision—no more "somewhere around 80Hz." Each click represents an exact, repeatable frequency point.
Ultra-Low Current Draw
High-efficiency SMD (Surface Mount Device) circuit technology minimizes idle current draw and maximizes power conversion efficiency. Less strain on your electrical system, more available voltage for clean power delivery, cooler operation under extended use.
Virtual Silence Turn-On/Off
Sophisticated mute circuitry eliminates the annoying "pop" or "thump" when powering the system on or off. Combined with quiet switching technology, this amplifier operates in near silence—no fan noise, no inductor whine, no interference.
Triple Protection System
Temperature-controlled output limiting, short circuit protection, and voltage ripple rejection keep your investment safe. The dual-LED status indicator (blue = normal, red = protection) provides instant diagnostic feedback if issues arise.
Technical Specifications
💡 Pro Tip: The 40-click precision controls allow exact frequency settings—consult the included reference chart to dial in precise crossover points matching your subwoofer's specifications and enclosure tuning frequency.
Advanced Features That Set the SQ600.1D Apart
🎛️ Dual Link External Bridging Capability
Need more power? Purchase a second SQ600.1D and link them together via the RJ11 bridge port to create a 1,200W @ 2Ω monoblock monster. The Master/Slave architecture keeps one amplifier in control of all tuning parameters while both units contribute power. Perfect for upgrading as your system evolves.
Dual Link Configuration: SQ600.1D × 2 = 1,200W RMS @ 2Ω minimum load (requires standard telephone-style RJ11 cable, not included)
📡 Wired Remote Level Control
Included remote bass control with RJ12 connector mounts at your fingertips on the dashboard. Adjust bass level on-the-fly without reaching back to the amplifier—essential for compensating between quiet night driving and highway cruising.
⚙️ High Damping Control Circuit
Superior damping factor keeps your subwoofer cone under tight control, eliminating overhang and "one-note bass." The result is articulate, punchy low-end that starts and stops exactly when it should—critical for SQ competition and audiophile listening.
🔌 High Current Voltage Ripple Rejection
Advanced filtering eliminates alternator whine, ignition noise, and voltage fluctuations from the power supply. Even in vehicles with less-than-perfect electrical systems, you get dead-silent background and pure, uncontaminated bass reproduction.
Professional Installation Guidelines
🔧 Mounting Location
Compact 7.25" × 10.5" footprint fits under seats, trunk floors, or behind rear seats. Class-D efficiency means minimal heat generation, but maintain 2" clearance on all sides for optimal airflow.
⚠️ Never mount upside down—compromises heatsink cooling efficiency.
⚡ Power Requirements
Minimum: 8 AWG power/ground wire (runs <7 feet)
Main Fuse: 60A within 18" of battery
Chassis Fuses: 2 × 30A ATC type
See included manual's wire gauge chart for longer runs
🔊 Subwoofer Matching
1Ω Load: Single 1Ω DVC sub (coils parallel) or two 2Ω SVC subs (parallel) = 600W
2Ω Load: Single 2Ω sub or two 4Ω subs (parallel) = 400W
4Ω Load: Single 4Ω sub = 200W
⚠️ Critical Tuning Recommendations
- Subsonic Filter: Set to ½ octave below ported enclosure tuning frequency (prevents driver unloading and damage)
- Low-Pass Filter: Start at 80Hz, adjust by ear to blend seamlessly with front stage
- Bass EQ: Use sparingly—excessive boost can cause thermal overload protection engagement
- Gain Setting: Use included 4-step procedure in manual—NOT a volume control!
Perfect Applications for the SQ600.1D
Sound Quality Competition Systems
Competition-grade transparency with >95dB S/N ratio and <0.4% THD. Precise 40-click crossover controls let you dial in surgical integration with front stage components—exactly what IASCA and MECA judges reward.
Daily Driver Audiophile Systems
Clean, articulate bass that complements music rather than overwhelming it. Perfect for jazz, acoustic, classical, and vocal-centric genres where muddy, boomy bass ruins the listening experience. Efficient Class-D operation won't drain your battery.
Compact Install Applications
Just 7.25" wide and 2" tall—fits in tight spaces where full-size amplifiers won't. Under-seat installations in crew cabs, behind seats in coupes, or stealth trunk installs where you need to preserve cargo space without sacrificing sound quality.
What's Included & Condition Details
✅ Complete Package Includes
- Image Dynamics SQ600.1D amplifier
- Wired remote level control with RJ12 cable
- Owner's manual with wiring diagrams
- Mounting hardware kit
- 40-click control frequency reference chart
- Original retail box with factory packaging
⚠️ NOT Included (Sold Separately)
- Power cable (8 AWG or larger required)
- Ground cable (8 AWG or larger required)
- In-line fuse holder & 60A fuse
- RCA interconnect cables
- Speaker wire (10 AWG minimum)
- RJ11 bridging cable (if using Dual Link)
PERFECT CONDITION • COMPLETE WITH ORIGINAL BOX
This amplifier is in perfect working and cosmetic condition. Unlike display models or open-box items, this unit has been carefully stored and maintained. All functions tested and verified to factory specifications.
Condition Highlights:
- Perfect cosmetic condition – no scratches, scuffs, or wear
- Complete with original retail box – factory packaging intact
- All accessories included – remote, manual, mounting hardware
- Fully tested and verified – all specifications confirmed
- Ready for immediate installation – exceptional value pricing
Image Dynamics USA offers a 1-year limited warranty on this amplifier (see manual for terms). Keep your dated receipt as proof of purchase for warranty service.
Why Serious Enthusiasts Choose Image Dynamics
In a market flooded with overhyped specifications and questionable power claims, Image Dynamics represents honest American engineering. Since 1992, they've built a reputation on delivering exactly what they promise—no marketing BS, just measurable performance.
Competition Proven
Won numerous IASCA/MECA SQ titles
Made in USA
Hand-built in Ontario, California
Real Support
Actual engineers answer the phone
Honest Specs
No inflated power ratings or fake claims
Experience Competition-Grade Bass Amplification Built the American Way
International Rectifier® Class-D efficiency meets three decades of Image Dynamics sound quality expertise. Perfect condition, complete with original box, ready to deliver transparent, distortion-free bass reproduction.
Complete with original box • Perfect condition • Includes all accessories • 1-year Image Dynamics warranty
Image Dynamics SQ600.1D 600W Mono Block Amplifier | Previous Demo
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.