Have you measured the voltage in those outlets - volt ohm meter. I remember repairing a preamp that worked well in my home and then the customer took it home and it did not work the same. After months of back-and-forth, I went to his home to measure the AC. It was 138 versus 120. go figure.
VANDERSTEEN 5A
Last year I bought a pair of used Vandersteen 5A from a reputable dealer that I have been buying for over 20 years. For the past year the amps on the 5A have been returned to Vandersteen for repairs an incredible 6 times (3 times each side). Did anyone experience this with the Vandersteen 5A? Any comments or suggestion is greatly appreciated. What should I do?