Alpine 10" Ported Subwoofer System | Previous Display
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.
Alpine S2-W10D4 Complete Bass System
10" S-Series Subwoofer + Proline-X Optimized Ported Enclosure
600W RMS Next-Gen Subwoofer in Custom 1.5 ft³ Tuned Enclosure
CNC-Precision • 34 Hz Tuning • Grey Carpet Finish
Complete Turnkey Bass System: Everything Included
🔊 Alpine S2-W10D4 Next-Gen Subwoofer
10" dual 4-ohm voice coil subwoofer handling 600W RMS (1800W peak). Features carbon fiber/polypropylene cone, HAMR rubber surround, progressive spider, and Alpine's Compound Radius Curve pole geometry. 25-215 Hz frequency response, 84.9 dB sensitivity. Includes trim ring, jumper cables for series/parallel wiring (2Ω or 8Ω final load), and 1-year Alpine warranty.
📐 Proline-X Performance Optimized Enclosure
1.5 cubic foot ported enclosure tuned to 34 Hz for maximum low-frequency output. CNC-cut 3/4" MDF construction with heavy internal bracing, interlocking dado joints, and unique V-port design. Professional grey carpet finish with rounded edges and carpet grooving. Single premium terminal cup. Dimensions: 24" W × 13" H × 15" D. Hand-crafted in Vacaville, California.
🎯 Ready-to-Install Turnkey System
Complete plug-and-play bass solution — subwoofer pre-installed in optimized enclosure with professional sealed construction and internal wiring to terminal cup. No guesswork on enclosure volume, port tuning, or compatibility. Simply connect your amplifier (600W RMS @ 2Ω recommended) and enjoy deep, powerful bass optimized for hip-hop, EDM, rock, and modern music genres demanding extended low-frequency output.
✨ Exceptional Value: Alpine S2-Series subwoofer + USA-made optimized enclosure + professional installation labor — Complete system saves hundreds versus buying components separately and paying for custom box fabrication.
Alpine: Japanese Engineering Excellence Since 1967
🏆 Pioneer of Mobile Electronics
Founded in 1967 as Alps Electric's automotive electronics division, Alpine pioneered car audio innovation including the first car CD player (1984) and first car DVD navigation system (1997). Alpine's S-Series represents decades of acoustic engineering expertise refined for affordability — delivering competition-grade performance at entry-level pricing through advanced manufacturing and material science.
🔬 Next-Gen S-Series Technology
The S2-W10D4 represents Alpine's latest S-Series redesign, incorporating technologies previously reserved for flagship models. Compound Radius Curve pole geometry (patented) ensures symmetrical magnetic field and optimized flux density. Progressive spider design features reinforced tinsel leads eliminating mechanical noise during high-excursion operation. Carbon fiber/polypropylene cone combines rigidity with damping for low-distortion bass reproduction.
💪 Performance Value Leader
Alpine S-Series subwoofers deliver 600W RMS power handling and 15mm Xmax at price points competitors cannot match. The dual 4-ohm voice coil configuration provides wiring flexibility for 2Ω or 8Ω final impedance. HAMR (High Amplitude Multi-Roll) rubber surround ensures linear excursion control throughout the 15mm travel range. Result: flagship performance metrics at mid-tier pricing through manufacturing efficiency and economies of scale.
Alpine's philosophy: Make high-performance car audio accessible to enthusiasts without flagship-level budgets. The S2-Series delivers competition-grade specifications through advanced engineering and efficient manufacturing — proving serious bass doesn't require premium prices.
Engineering Excellence: What Makes This System Special
1 34 Hz Tuned Port: Deep Bass Extension
This enclosure is tuned to 34 Hz — the sweet spot for modern music bass reproduction. Why 34 Hz? This frequency aligns with the fundamental frequencies of hip-hop 808s (30-40 Hz), EDM sub-bass (25-40 Hz), and rock kick drums (40-60 Hz). The S2-W10D4's recommended ported range is 0.8-1.35 ft³, and this 1.5 ft³ enclosure lands in the optimal zone for maximizing low-frequency output while maintaining port velocity control. Below 34 Hz tuning, the subwoofer loses acoustic loading and excursion increases dramatically. Above 38 Hz tuning, deep bass extension suffers. 34 Hz = maximum output + extended low-end + controlled excursion.
Ported enclosures deliver +3 to +6 dB more output near tuning frequency versus sealed boxes — free additional SPL without more amplifier power.
2 Carbon Fiber/Polypropylene Cone Hybrid
The S2-W10D4's carbon fiber/polypropylene hybrid cone combines two material advantages: carbon fiber's exceptional rigidity (high modulus of elasticity) and polypropylene's inherent damping (prevents ringing and resonance). Pure carbon fiber cones are rigid but ring like bells without damping. Pure polypropylene cones damp well but flex under high excursion. The hybrid construction delivers pistonic motion up to 15mm Xmax without cone breakup or flex distortion — critical for reproducing bass transients accurately at high SPL levels.
Cone breakup modes create frequency response peaks and distortion artifacts. Carbon fiber/poly hybrid pushes breakup modes above 500 Hz — well outside subwoofer's operating range.
3 Compound Radius Curve Pole Geometry (Patented)
Alpine's patented Compound Radius Curve extended pole geometry creates a symmetrical magnetic field throughout the voice coil's excursion range. Traditional flat pole pieces create asymmetric flux density — voice coil sees stronger magnetic field at bottom of excursion (inward motion) versus top (outward motion). This asymmetry causes even-order harmonic distortion and reduces power handling. The compound radius curve profile maintains constant BL (motor strength) across ±15mm travel, delivering linear output, reduced distortion, and improved power handling.
Symmetrical magnetic field = linear motor force throughout excursion = lower THD and higher output before distortion becomes audible.
4 Progressive Spider: High-Excursion Control
The progressive spider design features reinforced layer tinsel leads that eliminate mechanical noise and interference during high-excursion operation. Standard spiders allow tinsel leads (voice coil connections) to slap against spider corrugations during extreme excursion, creating audible "scraping" or "buzzing" noises. The progressive spider's reinforced layers secure tinsel leads while maintaining compliance for linear motion. Additionally, the progressive tension profile provides increasing restoring force as excursion increases — preventing over-excursion damage during transient peaks.
Progressive spiders act as mechanical limiters — soft compliance for normal listening, increasing stiffness prevents bottoming out during peak transients.
5 Proline-X V-Port Design: Low-Noise Airflow
The enclosure features Proline-X's unique V-port design — a precision-cut port with graduated flare that reduces turbulence and port noise. Standard straight ports create turbulent airflow at high SPL levels, producing audible "chuffing" or "whooshing" sounds that contaminate bass reproduction. The V-port's flared entry and exit transitions laminar airflow from enclosure to free air, reducing port velocity by 30-40% versus equivalent straight ports. Lower velocity = less turbulence = less port noise = cleaner bass reproduction at maximum output levels.
Port chuffing occurs when air velocity exceeds ~30 m/s. Flared ports reduce velocity by expanding airflow cross-section gradually — maintaining output without noise.
6 CNC Precision + Dado Joints: Structural Integrity
Proline-X enclosures are CNC-cut using ShopSabre industrial routers achieving ±0.005" tolerance — critical for airtight ported designs where air leaks destroy low-frequency response. The proprietary dado cut interlocking joints create mechanical lock between panels, eliminating reliance on glue alone for structural integrity. Combined with heavy internal bracing, this construction withstands 600W RMS continuous power without panel flex or resonance. Panel flex wastes acoustic energy and creates cabinet coloration — rigid construction ensures all driver output translates to air movement.
CNC precision + dado joints + internal bracing = zero flex enclosure that performs identically to custom competition-grade boxes at fraction of the cost.
Complete System Specifications
Alpine S2-W10D4 subwoofer + Proline-X Performance Optimized ported enclosure
💡 Recommended Setup: Wire voice coils in parallel for 2Ω final load. Use mono/bridged amplifier delivering 600-800W RMS @ 2Ω. This configuration extracts maximum power from modern Class D amplifiers while staying within the S2-W10D4's 600W RMS continuous rating. Subsonic filter at 25-28 Hz recommended to protect against excessive excursion below port tuning frequency.
Perfect Applications for This Complete System
Hip-Hop & EDM Bass Systems
The 34 Hz tuning frequency perfectly aligns with modern hip-hop 808s and EDM sub-bass frequencies (28-40 Hz range). Ported design delivers +4 to +6 dB more output near tuning frequency versus sealed boxes — critical for reproducing trap beats, bass drops, and sub-bass synth lines at realistic SPL levels. The 600W RMS power handling provides headroom for dynamic music with extreme bass content without compression or distortion.
Trunk Bass Upgrades
Compact 24" × 13" × 15" dimensions fit most sedan, coupe, and hatchback trunks without consuming excessive cargo space. The grey carpet finish matches most trunk interiors for OEM-quality appearance. At ~38 lbs complete weight, the system can be easily removed for cargo hauling when needed. Single 10" configuration provides serious bass output while preserving 70-80% of trunk functionality versus dual 12" systems.
Budget-Conscious Bass Solutions
Complete system delivers flagship-level specifications (600W RMS, 15mm Xmax, carbon fiber/poly cone) at mid-tier pricing. Alpine S-Series represents exceptional performance-per-dollar through manufacturing efficiency. Proline-X USA-made enclosure provides custom-box quality at pre-fab pricing. Complete package costs less than buying premium subwoofer alone + custom fabrication, while delivering professional results immediately.
Daily Driver SPL Systems
For enthusiasts seeking high SPL (Sound Pressure Level) without competition-level investment, this system provides serious output capability. The 1800W peak power handling and 34 Hz ported tuning enable burp SPL runs exceeding 140 dB (with appropriate amplifier). Compound Radius Curve pole geometry and progressive spider ensure clean output at maximum excursion without mechanical noise or distortion artifacts.
First Bass System Installations
Perfect for enthusiasts installing their first subwoofer system. The turnkey design eliminates complex decisions about enclosure design, volume calculations, and port tuning — all optimized by professionals. Simply connect 600-800W amplifier and enjoy deep bass immediately. Alpine's included jumper cables and clear documentation make series/parallel wiring straightforward even for DIY beginners. Grey carpet finish looks professional regardless of installation skill level.
Rock & Metal Bass Reproduction
Ported design's extended low-frequency output (down to ~28 Hz usable response) reproduces double-kick drum fundamentals and extended-range bass guitars accurately. The carbon fiber/polypropylene cone's low distortion characteristics preserve attack transients and tonal complexity in fast, technical bass lines. 600W RMS continuous power handling prevents compression during sustained high-SPL passages typical of metal and hard rock recordings.
💡 Why Ported Design: The Physics of More Bass
Acoustic Loading: Free Additional Output
Ported enclosures provide +3 to +6 dB more output near tuning frequency compared to equivalent sealed designs. This gain comes from acoustic loading — the port acts as a secondary radiator, adding its output to the cone's output. At 34 Hz tuning, the port contributes significant acoustic power while the cone excursion actually decreases (port does the work). Result: louder bass without additional amplifier power. If sealed box requires 600W to achieve 130 dB SPL, ported box achieves 133-136 dB SPL with same 600W — free 3-6 dB gain from physics, not watts.
34 Hz Tuning: Modern Music Optimization
Why 34 Hz specifically? Analysis of modern music reveals: Hip-hop 808s center around 32-38 Hz, EDM sub-bass sweeps 25-40 Hz, rock kick drums 40-60 Hz (with 30-40 Hz fundamentals). Tuning to 34 Hz places maximum output in the frequency range containing most musical bass energy. Higher tuning (38+ Hz) sacrifices deep bass extension. Lower tuning (28-30 Hz) requires larger boxes and provides minimal benefit since most music content is above 30 Hz. 34 Hz = optimal balance of extension + efficiency + compact size.
Reduced Cone Excursion at Tuning Frequency
At port tuning frequency (34 Hz), cone excursion reaches minimum while acoustic output reaches maximum — the port handles bass reproduction while cone barely moves. This counterintuitive behavior occurs because port impedance equals enclosure impedance at tuning frequency, creating acoustic short circuit that unloads the cone. Practical benefit: lower distortion and higher power handling at tuning frequency since cone isn't fighting massive excursion. Below tuning, cone excursion increases rapidly (requiring subsonic filter protection). Above tuning, both cone and port contribute output normally.
1.5 ft³ Volume: Optimal for Alpine S2-W10D4
Alpine recommends 0.8-1.35 ft³ ported with ideal of 1.13 ft³. This enclosure's 1.5 ft³ falls slightly above ideal but within maximum range, providing benefits: extended low-frequency response (larger box = lower F3 cutoff), reduced port velocity (less chuffing at high SPL), and improved power handling (more air volume = better cooling). The tradeoff: slightly larger physical size (24" wide vs 22" for 1.1 ft³ box). For users prioritizing maximum output and deep bass extension over absolute minimum size, 1.5 ft³ is optimal.
📦 Complete System Package Includes
1× Alpine S2-W10D4 Subwoofer (Pre-Installed)
1× Proline-X Optimized Ported Enclosure (1.5 ft³, 34 Hz)
Grey Premium Carpet Finish (Professional Grade)
Single Premium Terminal Cup (Rear Panel)
Alpine Trim Ring (Pre-Installed on Subwoofer)
2× Voice Coil Jumper Cables (3" Single Banana)
Complete Internal Wiring (Sub to Terminal Cup)
Alpine Owner's Manual & Documentation
1-Year Alpine Limited Warranty (Subwoofer)
1-Year Proline-X Warranty (Enclosure)
⚡ Ready to Rock: Simply connect amplifier speaker wires to terminal cup and secure enclosure in vehicle. Wire voice coils in parallel (using included jumpers) for 2Ω load. Use 600-800W RMS @ 2Ω monoblock amplifier for optimal performance. Enable subsonic filter at 25-28 Hz to protect against over-excursion below port tuning.
🔧 Professional Installation Tips
1️⃣ Voice Coil Wiring Configuration
For maximum power with modern amplifiers, wire voice coils in parallel for 2Ω final load. Connect both positive terminals together, both negative terminals together, then connect to amplifier. Use included 3" jumper cables. For older amplifiers not 2Ω stable, wire in series for 8Ω load: connect positive terminal 1 to negative terminal 2, then amplifier to remaining terminals.
2️⃣ Amplifier Power Matching
Use mono/bridged amplifiers delivering 600-800W RMS @ 2Ω. Minimum 600W RMS ensures adequate headroom for dynamic music. Maximum 800W RMS provides competition SPL capability without exceeding continuous rating. Popular matches: Alpine S2-A60M (600W @ 2Ω), Rockford Fosgate R1200-1D (600W @ 2Ω), JL Audio RD500/1 (500W @ 2Ω + high voltage headroom).
3️⃣ Subsonic Filter Configuration
Enable amplifier subsonic (infrasonic) filter at 25-28 Hz, 12-18 dB/octave slope. Below 34 Hz port tuning, cone excursion increases rapidly while acoustic output drops — subsonic filter removes inaudible content below 25 Hz that wastes amplifier power and risks over-excursion damage. Set low-pass filter (LPF) at 60-80 Hz initially, adjust by ear for smooth bass integration with front speakers.
4️⃣ Enclosure Securing Methods
Secure enclosure to vehicle floor or cargo area using L-brackets, ratchet straps, or heavy-duty Velcro. Unsecured 38 lb enclosure becomes dangerous projectile in collision and shifts during cornering (damages wires, scratches interior). Terminal cup should face rear/side for easy amplifier wire access. Ensure port opening has clear airflow path — blocked port destroys low-frequency output.
5️⃣ Wire Gauge Recommendations
For 600-800W amplifiers, use minimum 12 AWG speaker wire for runs under 15 feet, 10 AWG for 15-30 feet. Undersized wire causes voltage drop (reduced output) and increased distortion. Power wire: 4 AWG for 600-800W @ 2Ω from battery to amplifier. Ground wire: Same gauge as power wire, 18" maximum length to chassis ground point (sanded bare metal).
6️⃣ Break-In & Initial Settings
Allow 20-30 hours moderate volume break-in for suspension to reach optimal compliance. During break-in, avoid maximum volume/excursion. Initial amplifier gain: Set to match source voltage (use DMM or oscilloscope), NOT for maximum volume. Bass boost: Start at 0 dB, increase only if bass sounds thin after proper gain structure. Port chuffing (whooshing noise): Reduce volume or enable subsonic filter lower — indicates excessive port velocity.
Complete Turnkey Bass Excellence
This complete system delivers flagship-level bass performance through the synergy of Alpine's Next-Gen S2-W10D4 engineering and Proline-X's USA-made precision enclosure. The 600W RMS subwoofer featuring carbon fiber/polypropylene cone, compound radius curve pole geometry, and progressive spider design pairs perfectly with the 1.5 ft³ ported enclosure tuned to 34 Hz for maximum modern music output.
Whether upgrading from factory bass, building your first serious system, or seeking competition-grade SPL capability without premium pricing, this turnkey solution eliminates guesswork while delivering professional results. Simply connect your amplifier and experience deep, powerful, chest-thumping bass optimized for hip-hop, EDM, rock, and modern music genres. Exceptional value through complete system integration — Alpine flagship specifications + USA craftsmanship + professional installation labor included.
600W RMS / 1800W Peak • 1.5 ft³ Tuned to 34 Hz • Carbon Fiber/Poly Cone • Pre-Installed • Ready to Install
Alpine 10" Ported Subwoofer System | 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.