The question is more about whether the sensitivity of the preamp can make a ground hum somewhere more evident or whether there is a way to fight it.
On my old cheap Sony receiver, I could connect anything and hear very little hum from anything, but it was weak, and it sounded pretty bad in comparison to the new setup. On the new setup, anything that comes in contact with my TV (in this case indirectly) hums pretty badly. By indirectly I mean, I have my PS3 connected to my TV over HDMI, but I have my PS3 connected to the preamp over the AV Multi out's RCA plugs. It hums regardless of what input I have selected on the pre. It hums significantly more on the cheap Madcatz (I think) component cable than it does on my Sony cable that came with the PS3, but both are clearly audible and annoying at any silent point in game. I can disconnect the HDMI for CDs and be happy enough with no hum from that, but any time I have the TV connected to the pre, it hums.
At this point I'm thinking I'll try a ground loop isolator inline with the PS3's cable to isolate it from the TV's hum, but I'm wondering if the preamp is just that sensitive or if it's ground is just bad enough that any ground loop makes it hum.
At some point, a DAC is coming, so I may be able to escape the hum through SPDIF optical, but I am not getting one right away, so I'm in need of a solution to this problem using analog.
On my old cheap Sony receiver, I could connect anything and hear very little hum from anything, but it was weak, and it sounded pretty bad in comparison to the new setup. On the new setup, anything that comes in contact with my TV (in this case indirectly) hums pretty badly. By indirectly I mean, I have my PS3 connected to my TV over HDMI, but I have my PS3 connected to the preamp over the AV Multi out's RCA plugs. It hums regardless of what input I have selected on the pre. It hums significantly more on the cheap Madcatz (I think) component cable than it does on my Sony cable that came with the PS3, but both are clearly audible and annoying at any silent point in game. I can disconnect the HDMI for CDs and be happy enough with no hum from that, but any time I have the TV connected to the pre, it hums.
At this point I'm thinking I'll try a ground loop isolator inline with the PS3's cable to isolate it from the TV's hum, but I'm wondering if the preamp is just that sensitive or if it's ground is just bad enough that any ground loop makes it hum.
At some point, a DAC is coming, so I may be able to escape the hum through SPDIF optical, but I am not getting one right away, so I'm in need of a solution to this problem using analog.
