Operation Manual

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1. TECHNICAL DESIGN FEATURES
■ 8" ACTIVE SUBWOOFER
This compact active subwoofer deploys a class-D power amplifier. It is best used to upgrade
vehicles with a factory installed OEM speaker system. The cabinet utilizes a passive radiator,
to yield excellent low bass response from an extremely small net volume.
■ CLASS-D AMPLIFICATION WITH 70W RMS / 140W PEAK POWER
The amp-module features a class-D circuitry for high power output and low current
demand.
■ INTEGRATED ELECTRONIC CROSSOVER
The class-D amp-module deploys an electronic crossover. The lowpass filter is fully variable
from 60 to 120Hz, to integrate the active subwoofer with any given vehicle and the OEM
speakers installed.
■ VARIABLE PHASE-SHIFT
The variable phase-shift control – adjustable from 0 – 180° - enables to match the acoustical
phase of the bass output signal coming from the subwoofer, with the other loudspeakers
installed in the car.
■ ADVANCED PROTECTION CIRCUITRY
The protection circuitry safe-guards the amp-module of this active subwoofer from short-
circuits, DC offset voltage and overheating of power electronics.
AB20A Manual D+E.indd 11 04.08.2006 15:57:33 Uhr