– 10 –
– 11 –
– 10 –
– 11 –
1. TECHNICAL DESIGN FEATURES
■
10" ACTIVE SUBWOOFER
This compact active subwoofer deploys a class-D power amplifier. The AB25A is best used
to upgrade vehicles with a factory installed OEM speaker system. This system utilizes a
passive radiator, to yield excellent low bass response from an extremely small net volume.
■
CLASS-D AMPLIFICATION WITH 125 W RMS/250 W 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 with a slope steepness of 12 dB/
oct. The lowpass filter is fully variable from 50 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.
