Audison Prima APBX 10 AS2 10" Active Subwoofer Enclosure Compact Sub Box 400w

The Audison Prima APBX 10 AS2 is a compact active subwoofer enclosure featuring a 250 mm (10-inch) driver and a built-in 400 W RMS Class D amplifier. It is part of the Audison Prima range, designed for OEM and aftermarket integration in applications where boot space is limited.

If your SSP connector is damaged or lost, a replacement is available: Audison Prima SSP Replacement Sub Smart Plug.

Key specifications

• Driver: 250 mm (10-inch APS 10 DL high-impedance)
• Amplifier: integrated 400 W RMS Class D (He-Li technology)
• Peak power: 800 W
• Enclosure type: air suspension (sealed), ultra-low profile — 158 mm (6.22 in.) depth
• Inputs: high-level via multi-pin connector; low-level RCA
• Low-pass filter: Butterworth 12 dB/Oct, variable 50–300 Hz, defeatable
• Phase control: 0–180°
• Bass boost: 0–6 dB @ 45 Hz
• Auto turn-on (ART): selectable — Remote-in, Hi-level, or Audio signal
• Mounting: 2S² — down-firing or up-firing
• Includes: HRC AP remote control, SSP Plug & Play terminal block, metal grille, levelling feet with Velcro inserts

Audison Prima APBX 10 AS2 Active Sub Box

The Audison Prima range was designed for car enthusiasts who want accurate, nuanced bass that integrates cleanly with OEM systems without sacrificing boot space. The APBX 10 AS2 brings a dedicated high-performance amplification module to the passive Prima box platform, combining the 2S² design, SSP Plug & Play terminal block and an ultra-compact sealed enclosure in a single unit.

Features

• Integrated 400 W RMS Class D amplifier using He-Li (High-Efficiency / Low Impedance) technology — no switching power supply, achieving up to 90% efficiency.
• DBT (Dynamic Bass Tracking) input stage enables full use of the He-Li amplifier's power output, maintaining tight, dynamic bass at high listening volumes.
• Butterworth low-pass filter at 12 dB/Oct with variable cut frequency (50–300 Hz), phase control (0–180°), and adjustable bass boost 0–6 dB @ 45 Hz.
• Defeatable filter for use with a dedicated sub output from a bit or AP bit processor.
• High-level audio input on multi-pin connector for OEM integration; low-level RCA input for aftermarket head units.
• ART (Automatic Remote Turn-On) selectable between Remote-in, Hi-level, and Audio signal detection.
• Ultra-low profile enclosure — 158 mm (6.22 in.) deep — in air suspension, optimised for the APS 10 DL driver.
• SSP (Sub Smart Plug) terminal block with Plug & Play connector for safe, easy removal and refitting.
• 2S² (2 Sides / 2 Sounds) design: down-firing increases low-frequency extension; up-firing delivers more punch and definition.
• Down-firing levelling feet with Velcro inserts for secure carpet grip and easy removal.
• Rounded corners aid boot placement and reduce enclosure resonances.
• Cone, dust-cap and basket geometry engineered for a wide linear excursion of 9 mm (one direction) at minimal mounting depth.
• HRC AP remote control included.
• Sturdy metal grille included for full driver protection.

He-Li Amplification Module

The 400 W RMS amplification module uses He-Li (High-Efficiency / Low Impedance) technology. By eliminating the DC-DC voltage booster, it reaches approximately 90% efficiency — close to the theoretical limit of Class D design. The DBT (Dynamic Bass Tracking) input stage ensures the amplifier operates at full capacity, delivering controlled, dynamic bass even at high volume levels.