So I recently decided to put together a surround system for a new apartment I moved into. Before purchasing any equipment I evaluated my current speakers. Floor/Front speakers: Infinity Towers Surrounds: Paradigm Titan V.2's Source: Computer with external sound card using optical cable I purchased an Onkyo TX-SR575 as my reciever/amp. Up until a few weeks ago this was all I had. I had the Infinity speakers right next to the TV and the surrounds near my head on a couch. When playing a DVD on my computer using 2 Front/ 2 Rear everything sounds pretty good. I decided it was time to purchase a center channel and this is where things go wrong. I purchased this center channel from PartsExpress hoping that the quality would be comparable to the rest of the surround speakers: http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=300-674 Now when I try to watch a movie in 5.1 surround all the main dialogue from the center channel is very weak and hollow. I have adjusted my computer sound card so that all channels are flat and maximized yet the problem persists. I have tried every setting possible on the Onkyo reciever, adjust the center channel volume, all the usual audio settings (theater, DSP, etc). And nothing even comes close to bringing in the sound the way it should be. I suspect the culprit is the cheap center channel but I have no way to tell. Are there test CD's (preferably free online) that can help me figure this out or set it up? Any advice is greatly appreciated.