Thanks Ken. I was thinking it might be necessary to add a preamp too. Originally I was using the balanced 1/4" jacks, but moved to the rca jacks as I'm considering adding another set of speakers. I didn't notice much of a difference in volume between the balanced and rca connections. Dave
I have the umc204hd playback ports 1 & 2 wired to a fostex sub woofer with its passthru outputs connected to two mackie mr 524 speakers. I'm using Hauptwerk to supply the audio to the umc204hd. I have the latest version umc204hd asio driver, with it's output set to the max. The audio volume is lower than expected even with the speaker's volume controls set to the max. Any suggestions are most welcome! I've submitted two tech support requests for the umc204, both were closed with no apparent update from support that I can find...