Sound Storm Laboratories D400.2 Manuel D’Utilisation

9

Tri-Mode Operational Output is a unique feature which allows a Crossover (Subwoofer) to Be operated in 
MONO mode, while the main speakers are playing in STEREO.

To engage the amplifier in this mode, place the Crossover (Subwoofer) switch in the "OUT"position. Use a 
100v non-polar capacitor for a high pass crossover and a wire coil inductor to block high frequencies from 
the Crossover (Subwoofer) as shown in the figure below. Please review the table below for inductor and 
capacitor component values to determine the desired crossover frequencies.

Component Values
for 6dB Passive Crossover

Frequency        Inductor       Capacitor

80Hz
100Hz
120Hz
152Hz

7.5mH
6.5mH
5.5mH
4mH

470uF
330uF
330uF
220uF

GROUND

To REMOTE OUTPUT

from HEAD UNIT

To BATTERY

SPEAKER IMPEDANCE

4-8 OHMS!

LEFT

SPEAKER

RIGHT

SPEAKER

SUBWOOFER

MINIMUM IMPEDANCE

8 OHMS!

HIGH PASS FILTER CAPACITORS

LOW PASS FILTER INDUCTOR