Thanks Sedond. That is exactly what I am doing. I have a Krell HTS (home theater receiver) and the output goes into the left channel of my B&W sub. I also have a Krell KAV 500i (integrated amplifier) and it's two pre-amp outs go into the right channel through a Y-connector. Trouble is, I believe that Home Theater requires deeper, more powerful and a little louder bass than does two channel audio. I find myself turning the volume on the sub down and up based upon what I am listening to (HT or 2channel). I am looking for something that will take the LFE output of the HT preamp, AND the L/R preamp outputs of the integrated amplifier and allow me to adjust the volume independently. That way, I can have my sub cranked up for Home Theater and perfectly matched to my speakers for 2 channel audio without having to re-calibrate the system every time I switch sources. Plus, I'm hoping to get rid of that Y-connector.
Any more suggestions?