I am also using the Sony 9000, and have had best sonic results with the Townshend Seismic Sink. I know they are an older design...but I have tried many of the other things out there, and just got best results with the Sink.
Three other things that may help things sonically.
1. Try to keep your interconnects from running next to your AC cords.
2. If you have a cable TV feed that is connected to your system in any way....the ground on cable TV feeds can cause real sonic concerns...be it noise or DC voltages that are sometimes on these grounds. A quick way to check is to disconnect the 75 ohm coax from your system...and, if you are in single family home, go to where the cable comes into your home and see if there is a green ground wire going from the cable input to the AC conduit comming into your home. If there is, disconnect the green wire..and see if your system sounds better...if not then there is no cable problem. If your system sound better after this..the the cable does have something on the ground that is getting into your system. Of course, re-connect the ground..after this test. If there is a problem have a qualified electrician help get that noise bleed off the cable feed.
3. Make sure that the Sony 9000 is level. Not the shelf it is on, but the unit itself...an un-level cd drive may not be the concern it is with a turntable..but a level cd transport can sound better.
Hope some ot this helps.
Three other things that may help things sonically.
1. Try to keep your interconnects from running next to your AC cords.
2. If you have a cable TV feed that is connected to your system in any way....the ground on cable TV feeds can cause real sonic concerns...be it noise or DC voltages that are sometimes on these grounds. A quick way to check is to disconnect the 75 ohm coax from your system...and, if you are in single family home, go to where the cable comes into your home and see if there is a green ground wire going from the cable input to the AC conduit comming into your home. If there is, disconnect the green wire..and see if your system sounds better...if not then there is no cable problem. If your system sound better after this..the the cable does have something on the ground that is getting into your system. Of course, re-connect the ground..after this test. If there is a problem have a qualified electrician help get that noise bleed off the cable feed.
3. Make sure that the Sony 9000 is level. Not the shelf it is on, but the unit itself...an un-level cd drive may not be the concern it is with a turntable..but a level cd transport can sound better.
Hope some ot this helps.