AUDISON AVBX12D4II - Voce II 12 Inch Subwoofer Box 4Ω

AUDISON AVBX12D4II - Voce II 12 Inch Subwoofer Box 4Ω

No excess, no compromise—just deep, elegant and controlled bass designed to enhance every listening moment on the road. The Audison AVBX 12 D4 II combines the full authority of a 12-inch VOCE II subwoofer with an ultra-compact sealed enclosure optimized for modern vehicle interiors, designed to deliver impactful low-frequency performance in a refined, space-conscious format. Equipped with the AV 12 D4 II driver featuring dual 4-ohm voice coils (550W RMS / 1100W peak), 1.5-inch CCAW voice coil, FEM-optimized magnetic circuit, and Airflow Venting Cooling (A.V.C.) technology providing superior power handling and system flexibility allowing high-output configurations without compromising clarity or control. The high-density 15mm MDF structure reinforced with internal bracing ensures excellent mechanical stability and damping, while the sealed design produces tight extended bass with natural decay and definition reproducing every nuance of the low-frequency spectrum with depth and precision. The innovative 2S² dual-orientation architecture allows both Down-Firing and Up-Firing installation adapting to acoustic goals and available trunk space, while the Sub Smart Plug (SSP) terminal simplifies connections with hybrid interface offering Plug-&-Play and push-connect options ready for high-current wiring. Compact dimensions (607 x 401 x 175mm) provide space-efficient footprint for OEM integration, rigid enclosure damping minimizes box resonances ensuring accurate reproduction of kick drums and basslines, and refined minimalist styling reflects VOCE II design language combining functionality with elegance. Complete with eID technology for product registration and technical documentation access, the AVBX 12 D4 II expresses the VOCE II vision delivering true musicality engineered for sophisticated car audio systems demanding deep controlled bass performance.

Product Overview

Designed to deliver impactful low-frequency performance in a refined, space-conscious format, the AVBX 12 D4 II combines the full authority of a 12-inch VOCE II subwoofer with an ultra-compact sealed enclosure optimized for modern vehicle interiors.

Equipped with the AV 12 D4 II driver—featuring a dual 4-ohm voice coil—the enclosure provides superior power handling and system flexibility, allowing for high-output configurations without compromising clarity or control.

The high-density 15 mm MDF structure, reinforced with internal bracing, ensures excellent mechanical stability and damping, while the sealed design produces tight, extended bass with natural decay and definition. Engineered for true musicality, the enclosure reproduces every nuance of the low-frequency spectrum with depth and precision.

Its 2S² dual-orientation architecture allows both Down-Firing and Up-Firing installation, adapting to acoustic goals and available trunk space. The Sub Smart Plug terminal simplifies connections with a hybrid interface offering Plug-&-Play and push-connect options, ready for high-current wiring.

Every element of the AVBX 12 D4 II is developed to express the VOCE II vision: no excess, no compromise—just deep, elegant and controlled bass designed to enhance every listening moment on the road.

Important Notes:

Complete Plug-&-Play Solution: This is a complete sealed subwoofer enclosure system - no additional enclosure construction required. The AV 12 D4 II subwoofer is factory-installed and acoustically matched to the enclosure's internal volume and damping. Simply connect amplifier wiring via the Sub Smart Plug terminal and mount in vehicle. Professional installation recommended for optimal acoustic positioning and secure mounting.

Dual 4-Ohm Voice Coil Wiring: Features dual 4Ω voice coils allowing series wiring (8Ω final impedance) or parallel wiring (2Ω final impedance). Series configuration suits most factory and aftermarket amplifiers rated for 4-8Ω loads. Parallel configuration (2Ω) extracts higher power from 2-ohm stable amplifiers but generates more heat—verify amplifier is rated 2-ohm stable before parallel wiring. Use minimum 8 AWG high-gauge wiring for high-current connections.

Amplifier Power Matching Critical: Match amplifier RMS output to 550W RMS rating at your configured impedance (8Ω series or 2Ω parallel). Underpowering causes clipping distortion damaging voice coils. Overpowering beyond thermal limits causes voice coil failure. Ideal amplifier range: 400-600W RMS. Use proper gain structure, signal processors, and subsonic filtering (25Hz high-pass) protecting against excessive excursion below Fs (23Hz).

2S² Dual-Orientation Installation: Enclosure supports both Down-Firing (subwoofer facing floor) or Up-Firing (subwoofer facing upward) configurations. Down-Firing provides ground plane loading and tight bass coupling with vehicle floor. Up-Firing provides more direct acoustic output toward cabin. Choose orientation based on available mounting location, acoustic goals, and vehicle-specific installation constraints.

Secure Mounting Required: Ultra-compact enclosure must be securely mounted to vehicle structure using appropriate hardware. Unsecured enclosure movement during driving degrades sound quality, causes rattles, and poses safety risk. Use mounting brackets, straps, or custom mounting solutions ensuring rigid attachment. Verify mounting location does not interfere with vehicle operation, cargo access, or safety equipment.

Key Features

Ultra-Compact Sealed Enclosure - Engineered to maximize performance in minimal space, providing tight, articulate bass response while preserving valuable vehicle storage volume.

High-Density 15mm MDF Construction - Built using robust MDF panels and strategic internal bracing, ensuring maximum structural rigidity and suppressing unwanted resonances for clean low-frequency output.

2S² Dual-Orientation Architecture - Allows both Down-Firing and Up-Firing installation, offering installation flexibility depending on acoustic goals and available space.

Sub Smart Plug (SSP) Terminal - Combines quick-disconnect Plug-&-Play functionality with traditional push connectors, enabling secure, efficient wiring and hassle-free maintenance.

Acoustically Matched to AV 12 D4 II - Precisely tuned internal volume and damping ensure perfect integration with AV 12 D4 II driver for seamless low-frequency performance.

Factory-Installed Subwoofer - Complete plug-&-play solution with AV 12 D4 II subwoofer pre-installed and optimally positioned within matched enclosure.

550W RMS Power Handling - Exceptional thermal stability and mechanical robustness ensure reliable management of 550W RMS continuous power allowing sustained high-performance bass output.

Dual 4Ω Voice Coils - Flexible impedance configuration wires series (8Ω) or parallel (2Ω) matching various amplifier capabilities and system designs.

1.5" CCAW Voice Coil - Copper-Clad Aluminum Wire combines exceptional thermal handling with reduced mass maximizing responsiveness, precision, and durability.

FEM-Optimized Magnetic Circuit - Proprietary FEM simulation platform concentrates magnetic flux precisely around voice coil gap enhancing efficiency, responsiveness, and control.

Airflow Venting Cooling (A.V.C.) - Strategically placed internal channels optimize airflow and cooling efficiently dissipating heat maintaining consistent performance at high SPL.

Radial Reinforcement Framework (R.R.F.) - Internal structural rays beneath cone significantly increase mechanical rigidity reducing deformation risks during high-excursion operations.

16.8mm Xmax Linear Excursion - Substantial linear excursion capability enables deep bass output while maintaining control and distortion-free performance.

Space-Efficient Footprint - Compact dimensions (607 x 401 x 175mm) designed to fit effortlessly in wide range of vehicles, offering OEM-friendly solution for discreet high-performance bass.

Rigid Enclosure Damping - Minimizes box resonances and coloration, ensuring accurate reproduction of kick drums, basslines and low-frequency effects with minimal distortion.

High-Current Connectivity Support - Designed to accommodate high-gauge wiring for powerful system configurations without electrical bottlenecks.

Refined VOCE II Styling - Minimalist design combines functionality with elegance, matching VOCE II speaker aesthetic for cohesive system appearance.

eID Technology - Integrated Elettromedia eID system allows product registration, technical documentation access and extended warranty activation.

Technical Specifications

Note: Thiele-Small parameters specified with voice coils connected in series (4+4Ω = 8Ω).

Frequently Asked Questions

Q: What makes this different from buying a separate AV12D4II subwoofer?

A: The AVBX12D4II is a complete plug-&-play solution with the AV 12 D4 II subwoofer factory-installed in an acoustically matched enclosure. The internal volume, damping, and bracing are precisely engineered for optimal performance, eliminating the need for custom enclosure construction. The ultra-compact sealed design (175mm depth) preserves valuable vehicle space while the 2S² dual-orientation system and Sub Smart Plug terminal provide installation flexibility. This delivers premium VOCE II performance with true musicality reproducing every nuance of the low-frequency spectrum without custom fabrication work.

Q: How do I wire the dual 4Ω voice coils?

A: The dual 4Ω voice coils provide two wiring options via the Sub Smart Plug terminal: Series connection presents 8Ω to the amplifier - suitable for most amplifiers and standard power applications. Parallel connection presents 2Ω to the amplifier - requires amplifier stable at 2Ω loads and provides higher power transfer. The Sub Smart Plug combines Plug-&-Play quick-disconnect functionality with traditional push terminals for secure high-current wiring. Use minimum 8 AWG wiring and verify your amplifier's impedance stability at your chosen configuration.

Q: What amplifier power do I need for the AVBX12D4II?

A: Match amplifier RMS output to the 550W RMS rating at your chosen impedance (8Ω series or 2Ω parallel). For 8Ω series wiring, use amplifier rated 400-600W RMS at 8Ω. For 2Ω parallel wiring, use amplifier rated 400-600W RMS at 2Ω (verify amplifier 2Ω stability first). Underpowering reduces performance potential; overpowering risks thermal or mechanical damage. Quality amplifiers with proper gain structure prevent clipping which causes more damage than power ratings.

Q: What's the difference between Down-Firing and Up-Firing installation?

A: The 2S² dual-orientation architecture allows flexible mounting: Down-Firing (subwoofer facing floor) provides ground plane loading effect coupling bass energy with vehicle floor for tighter, more impactful low-frequency response. This orientation works well in trunk or cargo area installations. Up-Firing (subwoofer facing upward) provides more direct acoustic output toward cabin for greater perceived output and clarity. Choose based on your vehicle's acoustics, available mounting location, and whether you prioritize impact (Down-Firing) or direct output (Up-Firing).

Q: How does the 12-inch AVBX12D4II compare to the 10-inch AVBX10D4II?

A: The AVBX12D4II offers deeper low-frequency extension with Fs of 23Hz (vs 36Hz on 10-inch), larger cone area (539cm² vs 368cm²) for greater output capability, and higher sensitivity at 84.5 dB (vs 83.5 dB). The 12-inch requires slightly more space (607 x 401 x 175mm vs 531 x 361 x 160mm) but delivers more authoritative bass output with deeper extension and natural decay. Both share identical 550W RMS power handling, VOCE II technologies, and 2S² dual-orientation design. Choose the AVBX12D4II for deeper bass extension and higher output in larger vehicles, or the AVBX10D4II for ultra-compact installations with space constraints.