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Models 222 PBM, 262 PBM and 352 PBM THX
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Subwoofer Troubleshooting Guide
Once your subwoofer has been set up, you should have many years of maintenance free
enjoyment from your system. However, if you should encounter a problem, refer to the
following guide to help you find the solution. If a problem persists, you should contact
your local authorized Atlantic Technology dealer.
Problem Possible Cause Possible Solution
No bass output AC power cord unplugged or plugged into a Plug into a working outlet.
non-working outlet.
Input cables not securely connected or defective. Check all connections, then try another input cable.
Audible buzz Input cable not securely connected or defective. Check all connections, then try another input cable.
or hum
Single HI LEVEL input connected to the RIGHT channel. Connect to the LEFT input channel.
Ground loop through power connection. Use a 3-to-2 prong AC adapter plug to isolate the chassis’
ground of the subwoofer.
Ground loop through antenna or cable TV system input. Test by disconnecting antenna and/or cable system input leads.
If hum goes away, install isolation balun(s) at that point.
More than one More than one source is playing. All the subwoofer’s inputs are active at all times. Turn off
source audible unwanted source.
Weak bass Subwoofer too far from the wall. Move the subwoofer closer to a wall or corner.
VARIABLE INPUT LEVEL set too low. Turn control up somewhat.
Weak bass: vague
Input source connected to HI LEVEL inputs is wired Check speaker wire connections and reconnect in proper
stereo image out of phase. phase.
For Future Reference
Record your speaker(s) serial number(s) and date of purchase here:
Model Number Serial Number Date of Purchase
Model Number Serial Number Date of Purchase
The serial number is found on the back of the speaker near the connecting terminals.