BASS15/16Powered Subwoofer
TEST PROCEDURE
Equipment Needed:
Function generator/signal generator/sweep generator
Integrated Ampilfier
Multimeter
Speaker cables
UUT = Unit Under Test
General Function:
1. Connect two pairs of speaker cables to high level input terminal on UUT. Cables should be connected to an
integrated amplifier fed by the signal generatorObserve polarity of speaker cables..
2. Turn on generator and adjust so that speaker level output is 2.5V, 50 Hz.
3. Plug in UUT; red LED should be ON. Turn power switch to the ON or AUTO position and turn LEVEL control
full clockwise.
4. Green LED should light, immediate bass response should be heard and felt from port tube opening.
Sweep Function:
1. Follow steps 1-4 above, using a sweep generator as a signal source.
2. Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or any
other noises. If any noises are heard, remove driver and test.
Driver Function:
1. Remove one or both drivers from cabinet; remove + and - wire clips.
2. Check DC resistance of driver.
Bass 15 should be approximately 5.5 ohms.
Bass 16 should be approximately 5.8 ohms.
3. Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier
fed by a signal generator. Turn on generator and adjust so that speaker level is 5.0V.
4. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing or other unusual noises.
SERVICE NOTE (120v Version only)
Even though the Bass15 and 16 seem to have an on/off power switch, in fact the switch does not switch
the main power off to the amp assembly, even in the OFF position. All AC and DC voltages within the
amplifier are still active, so for safety concerns the AC power cord should be unplugged before any
servicing begins.
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ACEC
