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Old March 11th, 2010, 4:28 PM
Pete_Hsu Pete_Hsu is offline
Hsu Research
 
Member Since: Dec 2004
Location: Orange County, CA
Posts: 4,212
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Hi Robert,

The turbocharger is an alternative to plugging one port for maximum deep bass extension. Basically it allows one to lower the port tuning without sacrificing port cross-sectional area. This unit is no longer available, but I wouldn't worry too much about it, as the subwoofer is still quite strong without it.

Sincerely,
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