I currently and have for about 4 years run two different set of amps in my system the first being a pair of VTL M125s and the second a stereo Canary CA 306, the VTL amps have a recommended bias between 275 and 300 and they don't seem to differ at any setting in that area but the Canary is absolutely sensitive to the final setting, it is recommended to be set between 155 and 165 and I found my sweet spot at 162. Tooblue.
Is it real or just my imagination?
I recently checked and re-biased my ARC VT100 Mk II power amp. Tubes had not been re-biased since new, and the hours had reached around 500, so I felt it was time to check and adjust if necessary. Spec is 130. One channel measured 128, and the other 125. I set them both to spec, closed the amped, and took a listen. I was surprised to find that the amp sounded more dynamic, more "alive". I was surprised that this small a change in bias would make a clearly audible difference. Any body else have a similar experience ?