Audison Prima APBX 8 AS2 8" Active Sealed Subwoofer Enclosure — 250W RMS / 500W Peak, He-Li Amplifier, 2S² Down- or Up-Firing

The Audison Prima APBX 8 AS2 is an 8-inch (200 mm) active subwoofer in an ultra-low-profile sealed enclosure, with a dedicated 250W RMS Class D amplifier built in. The amplifier uses Audison's He-Li (high efficiency / low impedance) technology, with no DC-DC voltage booster, and reaches about 90% efficiency. A complete set of controls and both high-level and RCA inputs make it simple to add deep bass to an OEM or aftermarket system.

Key Features

• Integrated 250W RMS Class D amplifier with He-Li technology, around 90% efficient, and 500W peak power handling
• Dual-coil driver with ultra-low impedance, matched to the He-Li amplifier and the sealed box
• 2S² (2 Sides / 2 Sounds) design: choose down-firing for more low-frequency extension, or up-firing for more punch and definition
• Dynamic Bass Tracking (DBT) input stage that watches the signal for peaks and uses 100% of the amplifier's power without uncontrolled distortion
• Butterworth low-pass filter (12 dB/octave, variable cut-off), bass boost of 0–6 dB at 45 Hz and 0–180° phase control
• High-level Speaker-In on a multi-pole connector for OEM systems, plus RCA input for aftermarket sources

Technical Highlights

The ART (Automatic Remote Turn-On) function can follow the remote signal, the voltage on the high-level input, or the audio signal on either input. The low-pass filter can be bypassed when the subwoofer is fed from a dedicated sub output of an Audison bit processor. The SSP (Sub Smart Plug) terminal block gives a single Plug and Play connector so the box can be disconnected easily and safely. The driver has a linear excursion of 9 mm in one direction, a 40 mm voice coil and a high-density flux ferrite magnet with a water-repellent pressed paper cone.

Ideal For / System Fit

• Cars where boot or under-seat space is limited and a compact sub is needed
• OEM upgrades that need the multi-pole high-level input and automatic turn-on
• Installs that can use either a down-firing or an up-firing position

Sized for compact installs, not for the loudest output; it still needs a 12 V power supply, fuse and wiring, and professional installation is recommended.

Installation Note

The box footprint is about 368 x 294 mm, with a profile height of 158 mm (6.22 in) and a weight of around 6.3 kg. Down-firing leveling feet with Velcro inserts hold it on carpet, and rounded corners help placement in the boot. Use correct power wiring and fusing.

What's Included

1 x Audison Prima APBX 8 AS2 active subwoofer enclosure with metal grille and Velcro leveling feet (Abt also lists an HRC AP remote control; confirm whether it is included with your supplier)

Precautions

• Power ratings depend on the vehicle's electrical system; use correct fusing and heavy-gauge wiring
• Set the low-pass, bass boost and gain carefully to avoid overdriving the subwoofer
• Confirm that the 368 x 294 x 158 mm box fits your install location before buying
• Professional installation is recommended

Audison Prima APBX 8 AS2 vs. Passive Subwoofer Box

Frequently Asked Questions

What is the Audison Prima APBX 8 AS2?
An 8" active sealed subwoofer enclosure with a built-in 250W RMS amplifier.

How much power does it have?
250W RMS continuous and 500W peak power handling.

What is He-Li technology?
A high-efficiency, low-impedance amplifier design with no DC-DC voltage booster, reaching about 90% efficiency.

What does 2S² mean?
You can mount it down-firing for more low-frequency extension or up-firing for more punch and definition.

What is Dynamic Bass Tracking?
An input stage that detects peaks in advance so the amplifier can use all its power without uncontrolled distortion.

What inputs does it have?
A high-level Speaker-In on a multi-pole connector and a low-level RCA input.

What adjustments are available?
A variable low-pass filter, 0–6 dB bass boost at 45 Hz and 0–180° phase control.

Does it turn on automatically?
Yes. ART can follow the remote signal, the high-level input voltage or the audio signal.

Product Specifications

Add deep, controlled bass in one compact box — order the Audison Prima APBX 8 AS2 today.