• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

WE 350: dry bass?

Hi guys, just switched for used WE350B (NU ones) in Fisher 80AZ tube amp from Mullard EL37, (5.6V heater/370V anode measured).

AMAZING difference, can not be compared to ANY of 6L6/KT66 compartibles I have. But one issue found: bass went completely DRY.

Currently running with 5V4 RCA.

Can anybody comment? Many thanks!