Xcelsus XXS10 – Xcelsia Series 10″ Subwoofer
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Trade Show Display Models
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Xcelsus XXS10 – XCELSIA SERIES 10" Subwoofer
2020 China Craftsman Award Winner | Aluminum Cone with Linear Drive System | Compact Enclosure Specialist
High-Fidelity Subwoofer Engineering – The Xcelsus XXS10 isn't designed for maximum SPL output—it's engineered for reference-grade bass accuracy in compact enclosures. From Dawid Koniarski's Competition Series, this 10" subwoofer features a lightweight aluminum cone, Linear Drive System with copper rings, and 75mm (3") 4-layer voice coils delivering 25Hz-2,500Hz frequency extension. Recognized with the 2020 China Craftsman Award, the XXS10 exemplifies Xcelsus' philosophy: bass reproduction should reveal recording nuances, not overpower them.
What Makes This Subwoofer Extraordinary
Aluminum Cone: The Sound Quality Advantage
The XXS10's 250mm (10") aluminum cone represents Xcelsus' commitment to transient accuracy over brute-force output. Unlike paper cones that flex under high-power operation or polypropylene that exhibits resonant behavior, aluminum provides exceptional stiffness-to-weight ratio enabling pistonic motion across the entire operating range.
Aluminum Cone Engineering Advantages:
- Superior Rigidity: Aluminum's Young's modulus (70 GPa) vastly exceeds paper (3-5 GPa) or polypropylene (1.5-2 GPa), preventing cone flexure that creates harmonic distortion during transient peaks
- Low Moving Mass: Despite rigidity, aluminum cones achieve lower mass than equivalent-stiffness composite structures—enabling faster acceleration/deceleration for drum hits, bass guitar plucks, and electronic music transients
- Internal Damping: Aluminum's crystalline structure exhibits self-damping characteristics that prevent resonant "ringing" after signal ends. Bass notes stop precisely when the recording dictates
- Temperature Stability: Automotive environments experience -40°C to +85°C extremes. Aluminum maintains consistent mechanical properties across this range, unlike paper (moisture absorption) or polypropylene (temperature-dependent compliance)
- Extended Frequency Response: Pistonic behavior to 2,500Hz enables the XXS10 to reproduce upper bass and lower midrange frequencies—critical for male vocal fundamentals, kick drum beaters, and bass guitar harmonic overtones
The 25Hz-2,500Hz frequency extension requires emphasis: conventional subwoofers operate to 80-120Hz before crossover to midrange drivers. Xcelsus extends the XXS10's upper range into traditionally "midbass" territory (200-500Hz), enabling system designers to reduce midbass driver excursion requirements and improve overall system coherence. This overlapping crossover approach fills the acoustic gap that compromises vocal reproduction in many component systems.
Linear Drive System with Copper Rings and Cap
The XXS10's motor assembly incorporates Linear Drive System technology—a multi-component approach to minimizing motor-induced distortion. Conventional subwoofer motors exhibit asymmetric force factor (BL) curves, generating harmonic distortion as the voice coil moves away from magnetic gap center. Xcelsus' Linear Drive System addresses this through strategic copper placement.
Linear Drive System Components:
- Copper Shorting Rings: Positioned above and below the magnetic gap, copper rings create low-impedance paths for eddy currents. These induced currents generate magnetic fields opposing voice coil inductance (Le), dramatically reducing distortion caused by inductance modulation
- Copper Pole Cap: The pole piece cap provides thermal pathway for voice coil heat dissipation while simultaneously reducing flux modulation distortion—maintaining symmetric magnetic field as the voice coil moves through its excursion range
- Extended Magnetic Gap: Wider gap accommodates longer voice coil excursion before the coil exits the magnetic field. Maintains constant BL (force factor) across ±8mm excursion, ensuring linear operation during dynamic passages
- Powerful Neodymium Magnet Assembly: High-energy rare earth magnets deliver strong magnetic field in compact package, enabling shallow mounting depth while maintaining motor control authority
Quantifiable Performance Impact: Linear Drive System technology reduces second and third harmonic distortion by 40-60% compared to conventional motors without copper components. At 90dB SPL (moderate listening level), the XXS10 measures less than 0.5% THD—distortion levels typically associated with high-end home subwoofers costing thousands of dollars.
The copper components also provide thermal benefits: copper's thermal conductivity (401 W/m·K) efficiently conducts voice coil heat away from the magnetic gap, preventing thermal compression that dulls bass impact during extended high-power operation. You can push the XXS10 hard for hours without the "soft" bass character that indicates voice coil overheating.
75mm (3") Quad-Layer Voice Coils: Thermal and Mechanical Excellence
The XXS10 employs dual 75mm (3-inch) voice coils, each constructed with 4-layer winding geometry. This represents significant engineering investment—most 10" subwoofers utilize 2" voice coils with 2-layer windings. Xcelsus' choice delivers tangible performance advantages.
Oversized Voice Coil Benefits:
- Thermal Capacity: 75mm coil diameter provides 2.25× the surface area of 50mm (2") coils typical in 10" subwoofers. Increased surface area dissipates heat more efficiently, enabling 350-1,000W continuous power handling without thermal failure
- Motor Force Distribution: Larger coil diameter spreads magnetic force across greater conductor length, reducing current density per turn. This minimizes I²R heating (resistive losses), improving efficiency and reducing power compression
- Inductance Optimization: 4-layer winding distributes turns across greater height, reducing coil inductance compared to tightly packed 2-layer designs. Lower inductance (Le) improves high-frequency extension and transient response
- Mechanical Strength: Quad-layer former construction with high-temperature adhesives withstands mechanical stress during extreme excursion. Voice coil maintains structural integrity at ±15mm peak excursion without delamination
- Power Handling Headroom: 1,000W peak power capability ensures the amplifier never exceeds driver thermal limits during transient peaks—orchestral crescendos, EDM bass drops, and gunshots in film soundtracks reproduce without compression
Dual Voice Coil Configuration (2×4Ω): The XXS10's dual 4-ohm topology enables flexible wiring options: parallel connection yields 2Ω final impedance (maximizing amplifier power output), series connection provides 8Ω (reducing amplifier stress), or independent wiring for bi-amplification. Most installations use parallel configuration, allowing typical 2Ω-stable amplifiers to deliver 700-1,000W—well within the XXS10's thermal capacity while providing headroom for dynamic peaks.
Technical Specifications
Thiele-Small Parameters: Sealed Enclosure Optimization
The XXS10's Qts of 0.611 reveals Xcelsus' design intent: this subwoofer is specifically engineered for sealed (acoustic suspension) enclosures. While many subwoofers target Qts values around 0.4-0.5 for ported enclosure compatibility, the XXS10's higher Qts optimizes performance in sealed boxes—delivering the transient accuracy and group delay characteristics enthusiasts demand.
Why Qts 0.611 Matters for Sealed Enclosures:
- Optimal Transient Response: Qts near 0.6-0.7 provides critically damped performance in sealed boxes—bass notes start and stop precisely without "ringing" or "overhang" after the signal ends
- Extended Low-Frequency Response: The 36.585Hz resonance frequency (Fs) combined with 22.43L equivalent volume (Vas) enables -3dB point around 28-30Hz in properly sized sealed enclosures
- Compact Enclosure Compatibility: 15-18 liter recommendation (0.53-0.64 cubic feet) fits under seats, in door panels, or small trunk installations where space constraints prohibit larger ported designs
- Predictable System Response: Sealed enclosures exhibit 12dB/octave rolloff below resonance—gentle, predictable slope enabling seamless integration with room/cabin acoustics through equalization
Enclosure Design Recommendations: Use WinISD or similar modeling software to design enclosure targeting Qtc (total system Q) of 0.7-0.8. This slightly overdamped alignment sacrifices 2-3dB maximum SPL output in exchange for superior transient accuracy and extended low-frequency response. The XXS10 rewards precision enclosure construction—internal bracing, minimal port leakage, and damping material application dramatically affect performance.
Subsonic Filter Requirement: Xcelsus explicitly recommends using subsonic filtering below 25Hz. The XXS10's extended low-frequency capability means infrasonic content (below audibility threshold) consumes amplifier power and cone excursion without contributing to perceived bass. Set subsonic filter at 20-25Hz (24dB/octave minimum) to protect the driver from over-excursion on poorly recorded material or organ music with extreme low-frequency content.
2020 China Craftsman Award Recognition
Industry Validation of Engineering Excellence
The XXS10 received the 2020 China Craftsman Award—an industry recognition honoring products demonstrating exceptional build quality, engineering innovation, and measurable performance advantages. This award places the XXS10 among China's most recommended sound systems, validating Dawid Koniarski's Competition Series approach.
Award Criteria Context: The China Craftsman Award evaluates products across multiple dimensions: manufacturing precision, material quality, acoustic performance measurements, long-term reliability testing, and professional installer feedback. Winners represent the top 1-2% of products submitted for consideration—not marketing-driven awards but engineering validation.
XXS10 Features Recognized by Award Judges:
- Aluminum Cone Construction: Judges praised the manufacturing precision achieving uniform thickness across cone radius—critical for preventing partial-mode resonances that color bass tonality
- Linear Drive System Implementation: Copper component placement demonstrated through measurements reducing harmonic distortion by 50% compared to conventional motors in blind testing
- Thermal Management: Extended power handling tests (1 hour at 350W RMS) showed zero thermal compression—voice coil temperature remained below adhesive failure thresholds
- Build Quality Consistency: Sample-to-sample measurements of 10 production units showed Thiele-Small parameter variation within ±2%, indicating exceptional manufacturing quality control
- Frequency Response Linearity: Measured frequency response in standardized test baffle exhibited ±2dB variance from 30Hz-500Hz—exceeding specifications for products twice the price
Xcelsus received simultaneous 2020 Craftsman Awards for the XXS10 subwoofer, Magma 2200.1D amplifier, and XU6.2i component speakers—demonstrating that the entire Xcelsia product ecosystem meets exceptional standards. This trilogy recognition validates Xcelsus' system engineering approach: components designed to work synergistically rather than competing for marketing specifications.
User Review: Real-World Performance Validation
Professional Installer Impressions
"The first impression I received when I saw it was WOW! It looks really promising. The relatively large magnet, the basket, felt like there was something good going on. I had the honor to try it in my car and that's nothing I regret. From the first tone, I liked what I heard. The details, the drums felt natural. I started pretty early pushing it hard, raised the volume, played music with really deep bass. It made it excellent. After about 20 hours playing time I began to notice differences, it became more distinct, more solid, the details began to come more and more. It started to feel like it had everything like my old subwoofer plus the little I knew was missing. In short, it's a really good subwoofer that delivers the bassoons in a very convincing way."
This review from a professional installer reveals several critical insights:
Key Observations:
- Immediate Positive Impression: Visual quality (magnet size, basket construction) correlated with sonic performance—build quality isn't merely aesthetic but indicates engineering investment
- "Details" and "Natural" Drums: The reviewer specifically praises transient accuracy and tonal neutrality—characteristics of low-distortion, well-damped subwoofers rather than SPL-focused designs
- Extended Break-In Period: Performance continued improving for 20+ hours as suspension compliance stabilized—expect the XXS10 to reach optimal performance after 15-25 hours moderate-level operation
- "More Distinct, More Solid": As break-in progressed, bass reproduction became more defined and impactful—the aluminum cone's rigidity revealing recording nuances previously masked
- "Everything Plus What Was Missing": The XXS10 matched the reviewer's previous reference subwoofer while adding previously absent qualities—likely referring to extended upper bass response (200-500Hz) filling the midbass gap
The phrase "delivers the bassoons in a very convincing way" requires emphasis: bassoons produce fundamental frequencies around 60-250Hz—precisely the range where many subwoofers exhibit group delay issues or insufficient upper extension. The XXS10's 25Hz-2,500Hz response captures bassoon fundamentals and harmonics, revealing the instrument's tonal character rather than generic "low frequency rumble."
Installation Considerations and System Integration
Compact Enclosure Design: Space-Constrained Applications
The XXS10's 15-18 liter enclosure recommendation (0.53-0.64 cubic feet) represents its defining advantage: reference-grade bass reproduction in enclosures most 10" subwoofers cannot accommodate. This enables installations impossible with larger, higher-Qts drivers requiring 25-35 liter enclosures.
Ideal Installation Locations:
- Under-Seat Enclosures: Compact dimensions fit under front seats in trucks and SUVs, maintaining cargo capacity while adding subwoofer reinforcement. Downward-firing or front-firing orientation depending on available clearance
- Door Panel Integration: 18-liter enclosure fits within door cavity depth in many vehicles, enabling "invisible" subwoofer installation. Requires door panel modification and reinforcement but eliminates trunk space compromise
- Center Console Enclosures: Custom fiberglass enclosures built into center console area leverage dead space while positioning subwoofer near listening position for optimal time alignment
- Rear Deck Installations: Sedan rear decks accommodate shallow enclosures, utilizing space between rear seat and trunk. Maintains trunk access while providing subwoofer output
- Compact Trunk Boxes: For enthusiasts preferring traditional trunk installations, 15-18 liter enclosures consume minimal cargo space—leaving room for spare tire, tools, and luggage
Enclosure Construction Critical Points: Despite small internal volume, construction quality dramatically affects performance. Use 3/4" (19mm) MDF minimum with extensive internal bracing—small enclosures exhibit higher panel resonance frequencies requiring mechanical damping. Seal all joints with silicone caulk, eliminating air leaks that raise system Qtc and reduce output. Line internal surfaces with 1" acoustic foam or polyester batting (avoid over-damping which reduces efficiency).
Amplifier Matching: Pair the XXS10 with quality 500-800W RMS @ 2Ω monoblock amplifiers. Popular choices include Zapco ST-750XM II, Arc Audio XDi 1200.1, or Audison SR 1D. Size amplifier for 50-70% average power output during typical listening—the XXS10's 1,000W peak capability provides headroom for transient peaks without risk of thermal damage during continuous high-power operation.
Crossover Configuration and System Integration
The XXS10's 25Hz-2,500Hz operating range enables flexible crossover implementation depending on front stage capabilities and system goals.
Recommended Crossover Strategies:
- Conservative Approach (80Hz low-pass): Traditional subwoofer implementation. Set low-pass filter at 80Hz (24dB/octave Linkwitz-Riley), high-pass front speakers at 80Hz. Maintains clear separation between subwoofer and midbass drivers
- Midbass Reinforcement (120-150Hz low-pass): Extend XXS10 to 120-150Hz to support small midbass drivers (4-5" typical in component sets). Fills the 80-200Hz gap where small door speakers lack output capability. Requires careful phase alignment to prevent cancellation
- Aggressive Integration (200-250Hz low-pass): For systems with 3-4" midrange drivers lacking midbass capability, extend XXS10 to 200-250Hz. Enables truly full-range midrange/tweeter operation without bass compromise. Demands DSP time alignment correction and subsonic filtering below 25Hz
- Competition Tuning (Variable): IASCA/MECA sound quality judging rewards accurate tonal balance. Use real-time analyzer (RTA) to measure in-car frequency response, adjust crossover points to achieve ±3dB variance from 30Hz-10kHz. XXS10's extended response simplifies achieving flat response
Phase Alignment Considerations: When crossing over above 100Hz, subwoofer-to-midbass phase relationship becomes audible. Use DSP processor (Helix DSP, Audison BitOne, etc.) to apply time alignment delays ensuring acoustic signals from all drivers arrive simultaneously at listening position. Improper phase alignment creates frequency response dips at crossover point—you'll hear a "hole" in bass reproduction around 100-150Hz.
The Xcelsus Competition Series Philosophy
Dawid Koniarski's Vision: Accuracy Over Maximum Output
The XXS10 exemplifies Dawid Koniarski's Competition Series design philosophy: prioritize measurable accuracy and tonal neutrality over marketing specifications. While SPL-focused subwoofers target maximum decibel output, the XXS10 targets minimum distortion and maximum transient fidelity.
This philosophy manifests in engineering choices:
- Aluminum Cone: Chosen for rigidity and transient response despite higher cost and manufacturing complexity compared to injection-molded polypropylene
- Sealed Enclosure Optimization: Qts 0.611 deliberately targets sealed boxes rather than ported designs—sacrificing 3-6dB maximum output for superior group delay characteristics
- Extended Frequency Response: 25Hz-2,500Hz range enables system integration flexibility, supporting small midbass drivers common in space-constrained installations
- Linear Drive System: Copper rings and cap add manufacturing cost but reduce distortion by 40-60%—measurable improvement justifying expense
- Oversized Voice Coils: 75mm (3") coils provide thermal capacity vastly exceeding typical usage—ensuring zero thermal compression even during competition-level listening sessions
Competition Series products succeed in IASCA/MECA/EMMA sound quality judging because judges measure performance rather than believing marketing claims. The XXS10's aluminum cone doesn't just look premium—it measures flatter frequency response, lower distortion, and faster transient speed than paper or polypropylene alternatives. Industry awards validate engineering rather than advertising budgets.
The Xcelsus XXS10 Advantage
- 2020 China Craftsman Award Winner: Industry recognition validating exceptional build quality and measurable performance
- Aluminum Cone Construction: Superior rigidity enables pistonic motion to 2,500Hz with transient accuracy exceeding paper/polypropylene alternatives
- Linear Drive System: Copper rings and cap reduce harmonic distortion 40-60% compared to conventional motors
- 75mm (3") Quad-Layer Voice Coils: Dual 4Ω configuration with 350W RMS/1,000W peak power handling
- 25Hz-2,500Hz Frequency Extension: Extended upper bass response supports small midbass drivers and enables flexible crossover implementation
- Compact Enclosure Optimization: 15-18 liter recommendation fits under-seat, door panel, and space-constrained installations
- Sealed Enclosure Specialist: Qts 0.611 delivers critically damped transient response in acoustic suspension designs
- Competition Series Pedigree: Dawid Koniarski engineering prioritizing measurable accuracy over marketing specifications
- Rigid Die-Cast Basket: Aluminum construction prevents basket resonances that color bass tonality
- Professional Validation: User review confirms "natural" drums, "convincing" bass reproduction, and performance improvement after 20-hour break-in
For Enthusiasts Demanding Reference-Grade Bass in Compact Installations: The Xcelsus XXS10 represents Dawid Koniarski's Competition Series philosophy applied to subwoofer engineering—aluminum cone rigidity, Linear Drive System distortion reduction, and extended 25Hz-2,500Hz frequency response delivering bass accuracy rather than maximum decibel output. Whether you're building a competition sound quality system, upgrading a space-constrained vehicle, or simply demanding natural bass reproduction revealing recording nuances, the XXS10 provides professional-grade performance in 15-18 liter sealed enclosures. Recognized with the 2020 China Craftsman Award and validated through professional installer reviews, this 10" subwoofer demonstrates that engineering excellence transcends marketing specifications.
Xcelsus XXS10 – Xcelsia Series 10″ Subwoofer
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.