The subwoofer is already hooked to the control module, is it not? If the TV audio is going to the control module, the subwoofer should be working too, whenever the TV audio is on.
The sub does not need to hook to the TV, it should already be working.http://www.klipsch.com
take the spaces out of the above link before copy paste to browser
the speakers hook into the back of the sub woofer, the control module hooks into the back of the subwoofer, the sub woofer should be working now, without any further connection to the TV.