Nakamichi NBF25.5A 9.2" Active Aluminium Subwoofer

Product Information

The Nakamichi NBF25.5A is a compact 9.2-inch active subwoofer designed to add deeper, more powerful bass to your vehicle's factory or aftermarket sound system without taking up valuable boot space. Combining a high-output subwoofer with a built-in amplifier, the NBF25.5A provides a simple and effective solution for drivers looking to upgrade their car audio system with stronger, cleaner and more impactful low-frequency performance.

Featuring a slim aluminium enclosure measuring just 300 x 235 x 71 mm, the Nakamichi NBF25.5A is designed for installations where space is limited. Its compact profile makes it particularly suitable for under-seat installations, behind-seat mounting and other discreet locations within a vehicle.

With a 150W N-power output and 1500W maximum power rating, the NBF25.5A is engineered to deliver significantly improved bass response compared with standard factory speakers. The integrated amplifier eliminates the need for a separate subwoofer amplifier, helping simplify installation while keeping the overall system compact.

The NBF25.5A supports both high-level and low-level audio inputs, making it suitable for a wide range of factory and aftermarket car audio systems. This allows the active subwoofer to be integrated into vehicles with an original factory head unit as well as systems using an aftermarket head unit, amplifier or DSP.

Key Features & Benefits

• Nakamichi 9.2-inch active car subwoofer
• Integrated amplifier for simple installation
• 150W N-power output
• 1500W maximum power rating
• Slim aluminium enclosure for discreet installation
• Compact 300 x 235 x 71 mm dimensions
• Ideal for under-seat and space-conscious car audio installations
• 3Ω 9.2-inch subwoofer driver
• High-level speaker input for factory head unit integration
• Low-level RCA input for aftermarket car audio systems
• Adjustable low-pass filter from 50Hz to 150Hz
• Adjustable bass boost from 0 to +12dB
• Fixed 20Hz subsonic filter
• Signal-to-noise ratio of ≥90dB
• Total harmonic distortion of ≤0.2%
• Designed to add deeper bass without requiring a separate amplifier
• Suitable for factory audio upgrades and aftermarket sound systems

Compact Active Subwoofer Design

The Nakamichi NBF25.5A combines the subwoofer and amplifier into one compact enclosure, making it an excellent choice for vehicles where boot space is limited. At only 71 mm high, its slim aluminium construction allows for discreet installation in a variety of locations.

For customers wanting more bass from their factory car stereo without installing a large subwoofer enclosure in the boot, the NBF25.5A provides a practical solution that delivers additional low-frequency output while maintaining valuable storage space.

Powerful Bass for Your Car Audio System

The 9.2-inch subwoofer is designed to reproduce the low frequencies that standard factory door speakers often struggle to deliver. With a frequency response of 20Hz to 150Hz, the NBF25.5A adds depth and impact to music across a wide range of genres.

The integrated 150W N-power amplifier provides the required power to drive the subwoofer, producing stronger bass while keeping the installation straightforward and compact.

Adjustable Bass Control

The NBF25.5A provides control over the subwoofer's output so it can be matched to the rest of your vehicle's audio system. The adjustable low-pass filter can be set between 50Hz and 150Hz, allowing the subwoofer to concentrate on the lower frequencies while the vehicle's main speakers handle the midrange and high frequencies.

A 0 to +12dB bass boost is also included, allowing additional emphasis to be applied to the low-frequency response when required.

High-Level & Low-Level Inputs

The Nakamichi NBF25.5A can be integrated into both factory and aftermarket car audio systems thanks to its high-level and low-level input options.

High-level input allows the active subwoofer to be connected to the speaker outputs of a factory head unit, making it suitable for many original vehicle sound systems.

Low-level input provides a conventional RCA connection for aftermarket head units, DSP processors and other compatible car audio equipment.

This flexibility makes the NBF25.5A suitable for a wide range of car audio upgrades.

Professional Car Audio Installation

The Nakamichi NBF25.5A is an ideal addition to a professionally installed car audio upgrade. At Strathfield Car Radios, our installation team can integrate the active subwoofer into your existing factory or aftermarket sound system while maintaining a clean and discreet installation.

Installation can include integration with factory radios, aftermarket head units, amplifiers and upgraded speaker systems. The compact enclosure makes the NBF25.5A particularly useful for vehicles where boot space needs to be preserved.

Strathfield Car Radios also offers onsite car audio installation, providing a convenient solution for customers who want their Nakamichi active subwoofer professionally installed at their home, workplace or other suitable location.

Ideal Applications

The Nakamichi NBF25.5A is ideal for:

• Factory car stereo bass upgrades
• Aftermarket head unit upgrades
• Under-seat subwoofer installations
• Compact car audio systems
• Vehicles with limited boot space
• Adding bass without a large subwoofer box
• Factory speaker upgrades
• Car audio systems requiring an integrated amplifier and subwoofer
• Hatchbacks, sedans, SUVs, 4WDs and commercial vehicles
• Professional car audio installations

Key Product Specifications

Product: Active Aluminium Subwoofer
Model: Nakamichi NBF25.5A
Subwoofer Size: 9.2 inch
Subwoofer Impedance: 3Ω
N-Power Output: 150W
Maximum Power: 1500W
Frequency Response: 20Hz - 150Hz
THD: ≤0.2%
Signal-to-Noise Ratio: ≥90dB
High-Level Input Sensitivity: 0.5V
Low-Level Input Sensitivity: 110mV
Low-Pass Filter: 50Hz - 150Hz
Bass Boost: 0 - +12dB
Subsonic Filter: 20Hz fixed
Fuse Rating: 20A
Enclosure Material: Aluminium
Dimensions: 300 x 235 x 71 mm (L x W x H)

Why Choose the Nakamichi NBF25.5A?

The Nakamichi NBF25.5A is a practical solution for drivers who want noticeably deeper and more powerful bass without sacrificing boot space or installing a large traditional subwoofer enclosure.

Its slim aluminium enclosure, integrated amplifier, high-level and low-level inputs and adjustable bass controls make it a flexible option for both factory car stereo upgrades and aftermarket car audio systems.

For professional installation of the Nakamichi NBF25.5A, Strathfield Car Radios provides in-store and onsite car audio installation, helping you achieve a clean, discreet and properly integrated subwoofer upgrade.