Atlantic Technology 272 PBM THX Care and Feeding of Your Subwoofer, Atlantic Technology, Problem

Model 272 PBM THX Atlantic Technology®

A Word About Bass, Center Channel Modes, and System Set Up

Many surround processors and receivers feature a “Wide” and “Normal” mode for the center channel speaker. Atlantic Technology recommends that the center channel be operated in the “Normal” mode when using a powered subwoofer. The center channel speaker will sound more dynamic and the intelligibility of the system will generally be improved when in the “Normal” mode.

With discrete digital “5.1” channel systems (Dolby Digital AC-3, etc.) many controllers provide a Bass Management option, which lets you set the front and rear speakers in a limited bandwidth (Small) or full range (Large) mode. When using a subwoofer with Atlantic Technology speakers we recommend setting such a controller to the Small position for all the speakers in the system.

Care and Feeding of Your Subwoofer

The 272 PBM THX is constructed from 3/4" Medium Density Fiberboard. MDF is a non-resonant material ideal for speaker system enclosures. The outside is layered with a high quality black oak finished vinyl laminate. To clean the cabinet you may use a soft cloth either dry or slightly dampened with clean water. Be careful not to wet the cabinet or allow any water to enter the cabinet seams. Avoid placing your speakers in direct sunlight or near a source of heat that may, over time, damage the finish.

IMPORTANT: Save Your Boxes! If you can do so, save the carton, packing pieces and plastic bags that came with your subwoofer. They will be useful in case you move or have to ship your subwoofer for any reason. In any case, save all packing materials until you are certain that the system has suffered no damage in shipment. If you find such damage, either visible or internal, contact your dealer immediately for the proper return procedure.

Subwoofer Troubleshooting Guide

Once your subwoofer is 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 non-working outlet.
	Input cables not securely connected or defective.

Plug into a working outlet.

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 only.	Connect to the LEFT input channel.
	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.
source audible

All the subwoofer’s inputs are active at all times. Turn off 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 stereo image	Input source connected to HI LEVEL inputs is wired out of phase.	Check speaker wire connections and reconnect in proper phase.

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