With the introduction of Jeff Rowland Design Group Model 10 into the house, i experienced audio hum & buzz! Initial troubleshooting showed removing the 3M lighting 2 pin plug from same power strip to resolved it . Apparently it worked for 1 night.
Configuration is CD Player > Pre > Power Amp.
To cut long story short, after trying out several combination to trace the source issue. It is the the RCA – XLR cabling from pre to power amp. Right now, I am using RCA – RCA to the Rowland amp (unbalanced selector) and the noise floor drop to acceptable level again.
Yamaha PC2200 Power Amp is the workhorse! thrown anything at her so can produce. The RCA-XLR is an audio hack which the Ferrari JRDG rejected. It might be unfair to compare the Yamaha with JRDG but it looks like my new girlfriend is very particular to get the best out of her.
I think i earned my morning breakfast with the 45minute troubleshooting and work out.
And that my friend, is audio FTW.