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Instruction Manual
Subwoofer Troubleshooting Guide
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 Technol-
ogy dealer.
Model 642e SB Specifications
Type/Features Powered subwoofer, sealed enclosure
High efficiency tracking amplifier
2-inch, four layer vented aluminum voice coil, vented motor
Continuous 40–140Hz crossover, 18dB/octave low pass output
Variable low level stereo inputs and low level outputs
Absolute phase invert switch
Auto signal sensing on/off/bypass
Bass Driver 12” long-throw composite cone
Output Power 300W RMS
Distortion (amplifier) <0.5%
Frequency Response 25Hz – 300Hz ±3 dB
Low Level (line) 20k Ohms
Peak Output 105dB SPL into 2000 cubic Feet
Dimensions (WxHxD) 19 x 21 x 20½ in; 483 x 534 x 521mm (Depth with Grille)
Weight 65lbs/29.5kg
Power Requirements 110V AC 50/60Hz; 240V AC 50/60Hz
Specifications are those in effect at the time of printing. Atlantic Tech-
nology reserves the right to change specifications or designs at any time
without notice. THX is a registered trademark of Lucasfilm Ltd. Dolby
Digital, Dolby Stereo, and Dolby Pro Logic are trademarks of Dolby Labo-
ratories Licensing Corporation. DTS is a registered trademark of Digital
Theater Systems, Inc.
Problem Possible Cause Possible Solution
No bass output AC power cord unplugged or Plug into a working outlet.
plugged into a non-working outlet.
Input cables not securely Check all connections, then try another
connected or defective. input cable.
Audible buzz or hum Input cable not securely connected Check all connections, then try another
or defective. input cable.
Ground loop through antenna or Test by disconnecting antenna and/or cable
cable TV system input. system input leads. If hum goes away, install
isolation balun(s) at that point.