Its been awhile since I posted here so here goes... I've known for awhile now that my mixes don't translate well. Usually they sound a bit muffled (lacking upper-mids and highs) when being played on other quality sound systems. I'm using M-Audio Bx-8a's and the acoustics in my room are pretty lousy (lots of slapback echo). While I am working on upgrading my monitors and acoustics I was wondering about another piece of equipment in my signal path. Coming out of my EMU 0404 interface is a stereo out that goes to a Presonus HP4 headphone amp. The HP4 allows me to plug in and control multiple headphones (though its usually just me) AND my monitors. While convenient, I was wondering if this relatively cheap piece of equipment is affecting the quality of my signal path and if so, how significantly. http://www.presonus.com/products/Detail.aspx?ProductId=20 Thanks for anyone's help!