Hi, I have a Cinemate Bose Speaker Series II System and I would like to know if I could connect Stereo Jacks from the Bose Module to a Stereo Receiver without damaging the speakers or subwoofer, and if this is possible will I be able to control the Treble and Bass through the Receiver?

You still haven't described the non-Bose receiver.

In general, it is best for your ears to have the audio from every source go directly to the best audio electronics; and best for your eyes to have the best video go directly from every source to the TV. THAT is one reason they have separate paths and cabling for both media from any given A/V source.

Bass and treble controls are generally placed electrically just before an amplifier stage in any product, especially so they DON'T affect tape recordings or downstream products which migh tuse the Line Level audio output; and they will NOT make up for severe deficiencies in the source audio, no matter where you apply them. You should ponder WHY the MD has "no highs". You still haven't described the non-Bose receiver. In general, it is best for your ears to have the audio from every source go directly to the best audio electronics; and best for your eyes to have the best video go directly from every source to the TV. THAT is one reason they have separate paths and cabling for both media from any given A/V source. Bass and treble controls are generally placed electrically just before an amplifier stage in any product, especially so they DON'T affect tape recordings or downstream products which migh tuse the Line Level audio output; and they will NOT make up for severe deficiencies in the source audio, no matter where you apply them. You should ponder WHY the MD has "no highs".

You could have started with that piece of information.

Line Level or digital optical signals between the new receiver and the Bose will not harm anything and are, in fact, the only ways to feed it any audio. Neither one will give your new receiver local control of volume through the Cinemate.

Buying a new (presumably multichannel and digital) receiver without its own speakers to drive directly won't accomplish much for the sound or the Bose Cinemate other than to add the (presumed) FM and any other audio sources it uses to the mix. The Cinemate is for users who don't want the complexity of an A/V receiver and only want improved TV sound. In time, if you flesh out the new system, the Cinemate will become a limitation and will be redundant. You could have started with that piece of information. Line Level or digital optical signals between the new receiver and the Bose will not harm anything and are, in fact, the only ways to feed it any audio. Neither one will give your new receiver local control of volume through the Cinemate. Buying a new (presumably multichannel and digital) receiver without its own speakers to drive directly won't accomplish much for the sound or the Bose Cinemate other than to add the (presumed) FM and any other audio sources it uses to the mix. The Cinemate is for users who don't want the complexity of an A/V receiver and only want improved TV sound. In time, if you flesh out the new system, the Cinemate will become a limitation and will be redundant.