Sorry about the last short reply. Had to make it a quick one. Here's what I found last night. With the sub volume set to flat (+0dB), it won't kick in until the master volume hits around -20dB to -15dB. Taking your advice, John, I set the output level higher and just adjusted the volume on the ICBM. That did the trick and now I get output with the master volume set to -32dB. Thanks for help guys. Back to the music.