Nakamichi NBX305A 12" Active Subwoofer Box - Premium High-Power Bass

Experience premium, high-power bass with a professional-grade 12" active subwoofer—2400W peak output with built-in 350W amplifier.

Product Overview

The Nakamichi NBX305A is a premium 12-inch active subwoofer box featuring an integrated high-power amplifier and professional-grade components. Delivering an impressive 2400W peak power and 350W continuous N-Power with 40-150Hz frequency response, this powerhouse system provides concert-level bass performance for serious audio enthusiasts. The advanced design features a 2-ohm 12-inch subwoofer with massive 49.5mm ASV voice coil and robust 1275g Y25 magnet structure for exceptional power handling, thermal capacity, and excursion control. At 16.2kg in a 555 x 210/320 x 410mm enclosure, the NBX305A delivers authoritative, room-filling bass that transforms any vehicle into a mobile concert venue. Perfect for larger SUVs, dual-cab utes, 4WD touring vehicles, and premium audio builds where serious bass output is essential—ideal for Australian drivers who demand professional-grade low-frequency reproduction for music, outdoor events, and touring adventures without the complexity of separate high-power amplifier installations.

Key Specifications

• Premium 12-inch active subwoofer with built-in amplifier
• 2400W peak power output
• 350W continuous N-Power (RMS equivalent)
• Frequency response: 40-150Hz
• 82dB ± 3dB sensitivity
• 2Ω impedance (high-power optimized)
• 49.5mm ASV (Aluminium Silicon Voice Coil)
• Y25 magnet: 135 x 60 x 20mm (1275g / 45oz)
• Professional-grade enclosure: 555 x 210/320 x 410mm
• Substantial construction: 16.2kg
• All-in-one active design (no external amplifier required)
• Universal vehicle fitment (larger vehicles recommended)

Features & Benefits

Professional-Grade Power Output: Massive 2400W peak with 350W continuous N-Power delivers concert-level bass performance that fills cabins, open cargo areas, and outdoor spaces—perfect for serious music enthusiasts, outdoor events at campsites, beach gatherings, or touring adventures where powerful, authoritative bass reproduction is essential.

Premium 12-Inch Driver: Larger 12-inch cone provides greater surface area for deeper bass extension, better cone control, and higher maximum output compared to 10-inch subwoofers—ensures bass remains tight, controlled, and distortion-free even at extreme volume levels during dynamic music passages or cinema-quality soundtracks.

Massive Magnet Assembly: Exceptional 1275g (45oz) Y25 magnet structure provides tremendous motor force and thermal capacity, maintaining consistent output during extended high-power use—critical for marathon listening sessions during outback touring, long highway drives, or multi-day camping trips with continuous audio entertainment.

High-Power Voice Coil: 49.5mm ASV (Aluminium Silicon) voice coil construction handles extreme power levels with efficient heat dissipation, maintaining linear excursion and low distortion even when pushed hard—ensures your bass remains clean, accurate, and impactful rather than compressed or distorted during demanding music.

Built-In High-Power Amplifier: Integrated 350W amplifier eliminates the need to purchase, install, and configure separate high-power amplifiers—significant cost savings (quality 350W amplifiers cost hundreds), simplified wiring, reduced installation complexity, and guaranteed amplifier-to-subwoofer matching for optimal performance.

2-Ohm Power Optimization: 2-ohm impedance configuration allows the built-in amplifier to deliver maximum power output efficiently—provides headroom for dynamic peaks in music without straining electrical systems, ensuring clean reproduction of bass-heavy electronic music, hip-hop, rock, and cinema soundtracks.

Professional Enclosure Construction: Robust 555mm enclosure with 16.2kg construction ensures rigid, vibration-free mounting that prevents panel resonance and maintains acoustic control—delivers tight, accurate bass reproduction rather than the boomy, undefined bass from poorly constructed enclosures.

Serious Bass for Serious Vehicles: Designed for larger vehicles with adequate installation space and electrical capacity—ideal for full-size SUVs, dual-cab utes, 4WD tourers, and premium audio builds where maximum bass output and authority are priorities over space efficiency.

Technical Specs

• Type: Active Subwoofer Box (powered, built-in amplifier)
• Subwoofer Size: 12 inches
• Peak Power Output: 2400W
• Continuous N-Power: 350W
• Frequency Response: 40Hz - 150Hz
• Sensitivity: 82dB ± 3dB (1W/1m)
• Impedance: 2Ω
• Voice Coil: ASV (Aluminium Silicon) 49.5mm diameter
• Voice Coil Former: High-temperature resistant material
• Magnet Type: Y25 Ferrite
• Magnet Dimensions: 135mm x 60mm x 20mm
• Magnet Weight: 45oz (1275g)
• Enclosure Type: Sealed/ported (verify from product specifications)
• Unit Dimensions (L x W x H): 555mm x 210mm/320mm x 410mm
• Net Weight: Approximately 16.2kg (single unit)
• Mounting: Universal (larger vehicles recommended)
• Connections: RCA line-level input, high-current power/ground/remote connections
• Operating Voltage: 12V DC (typical automotive)
• Protection: Short circuit, thermal overload, DC offset protection
• Recommended Fuse: 40-50A (verify specifications)

Frequently Asked Questions

What electrical system requirements does this high-power subwoofer have?

At 350W continuous output, the NBX305A draws approximately 35-40 amps during maximum output from your 12V system. Ensure your vehicle has a quality battery and alternator rated 100+ amps. Use minimum 4-gauge power cable with 40-50 amp inline fuse positioned within 450mm of battery. Vehicles with upgraded electrical systems or dual-battery setups are ideal.

How much space does this subwoofer require for installation?

The enclosure measures 555 x 210/320 x 410mm—significantly larger than compact active subwoofers. Best suited for boot installations in SUVs, wagon cargo areas, or behind-seat mounting in dual-cab utes. Measure your available space carefully and ensure adequate clearance for airflow around the amplifier section for cooling.

How does this compare to the smaller 10-inch active subwoofers?

The NBX305A delivers over double the power (350W vs 150W), uses a larger 12" driver for deeper bass and higher output, and features a massive 1275g magnet (vs 700-900g). It's the premium choice for maximum bass performance but requires more space, stronger electrical system, and suitable vehicle size.

Do I still need an external amplifier with this much power?

No, the NBX305A includes a built-in 350W amplifier specifically matched to the 12-inch subwoofer. No external amplifier purchase necessary—this saves AU$300-600+ on quality 350W amplifiers plus installation complexity. Simply connect power and audio signal for complete bass solution.

Which vehicles are best suited for this subwoofer?

Ideal for full-size SUVs (Land Cruiser, Patrol, Everest), dual-cab utes (Ranger, Hilux, Amarok, Navara), large wagons, and 4WD tourers with adequate boot/cargo space and robust electrical systems. Not recommended for compact cars or vehicles with limited installation space or basic electrical systems.

Compatible With / Goes Well With

Ideal Vehicle Types:

• Full-size SUVs and 4WDs (Land Cruiser, Patrol, Prado)
• Dual-cab utes with extended/crew cabs (Ranger, Hilux, Amarok)
• Large station wagons with substantial cargo areas
• Premium audio builds in vans and people movers
• Touring vehicles with upgraded electrical systems

Essential Installation Accessories:

• 4-gauge amplifier wiring kit (high-current rated)
• 40-50 amp inline fuse holder
• Heavy-duty distribution block (if multiple power consumers)
• High-quality RCA cables (shielded, twisted pair)
• Sound deadening material for enclosure area
• Professional-grade mounting hardware
• Battery voltage stabilizer or capacitor (recommended)
• Secondary battery or battery isolator (touring applications)

Compatible Audio Systems:

• Premium aftermarket headunits with subwoofer pre-output
• High-power multi-channel amplifier systems
• Digital sound processors for system tuning
• Component speaker systems requiring serious low-frequency foundation
• Complete SQ (Sound Quality) or SPL (Sound Pressure Level) builds

System Enhancement Products:

• Upgraded alternator (130-150+ amp rating)
• AGM battery upgrade for better electrical stability
• Bass remote control (if unit supports)
• Professional acoustic treatments
• Voltage meter for electrical system monitoring
• Secondary subwoofer for dual-sub configuration (serious builds)

Caution: This is a high-power subwoofer requiring adequate electrical system capacity. Verify your alternator rating, battery condition, and available power capacity before installation. Professional installation strongly recommended due to high-current wiring requirements, proper grounding, and acoustic optimization. Ensure secure mounting capable of supporting 16.2kg during vehicle movement.

Weight

16.2kg per unit.