I will try all of this but I wanted to add that the noise isn't constant. it's a rustling sound whenever a sound is playing (a little like peaking on poor quality speakers).
I have 2 Wharfdale Rubiance RB-25 speakers connected to my Pioneer A400 amp. Since I connected them I've noticed that no mater what the configuration, the right red output creates buzz at around the higher end of vocal frequency (~3kHz). This is confirmed for different inputs (CD, Phono and line...
The speakers are in synch but as I turn the volume up from 0, one of the speakers plays (at around 0.5 volume) sound before the other (at around 1 volume). It also seems that at volume 2+ the vol1 speaker is quieter.
The system is made up of two stereo speakers with a tweeter and woofer each...
I bought a set of Wharfedale Rubiance RB-25 speakers to go with my pioneer amp and pioneer cd player (can't remember model number but 1980's tech). They were sold to me as a set and I tested before taking them home.
Each speaker has two parts - an upper speaker and a lower (sub?) speaker head...