Fig.6 A Single Voice Coil Subwoofer (1~4 ohm)(XT 9.0KW)
Speaker Load
Keep in mind your
X-Treme
D Class amp is a high power amplifier and not a high current amplifier.
In other words it requires a minimum impedance of 1 ohm. Both speaker outputs are
internally
paralleled
, thus a minimum speaker impedance of 2 ohms is required when using more then one of
the speaker outputs.
If you are unsure of calculating impedance loads please consult your X-
Treme dealer before damaging your amplifier.
Too low of an impedance could send your amplifier into protection mode and/or damage the
amplifier.
Speaker Wiring
Choose the correct speaker wire for your application. We recommend a minimum of 8 gauge wire.
Route these using the same precautions as you did when you ran the power cable. Terminate these
wires at the speaker end using insulated speaker terminals (not supplied) or by soldering the
connection to the speaker. Be certain to maintain correct polarity throughout the system. Make
sure the speaker connections are positive-to-positive and negative-to-negative. Most speaker wire
has some indicator (color code, ribbing, or printing) on one of the two wires to help you distinguish
the positive (+) and negative (-) leads.
At the amplifier end, insert the stripped (bare) speaker wires into the properly marked terminals.
Use a Philips (cross) screwdriver to loosen the speaker terminals on the amplifier. Make certain that
no bare wire ends touch each other. Such contact could result in an electrical short and cause the
amplifier to turn off (short circuit protection) or malfunction.
Fig.7 Gain Control
Input Gain Adjustment
This control allows you to match the input level of the amplifier to the output level of your head unit.
Matching the input can be accomplished in three simple steps:
1. Set the volume of GAIN on the amplifier to Min (completely counter clock wise).
2. Turn on the head unit and adjust volume to 2/3 maximum, and set the BASS and
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