I have heard some good comments about the use of tactile transducers such as Clark Synthesis and Buttkicker. Anyone have any comments about them? Also, can you tell me how they work? Do they require a separate amplifier or are they self-amplified(amp built-in)? Could someone power a tactile transformer with an extra channel of a multichannel amplifier? Does the transducer accept typical speaker cable as does any other speaker? Thinking about the EAD Powermaster 8300 8 channel amp--could have a 7.1 system and use the 8th channel for the transducer. Would this work? Thanks for any comments.