Hi, having recently had my AI/ 500 series amplifier with border patrol power supply brilliantly serviced and significantly upgraded by David ( AD Audio ) on this site,
it is now time to replace the 4 output valves. Well, for the last 4 years I've been more than happy with my 5881 ( Edicron ) and I suppose there s the old adage
if it aint broke don't fix it. However the KT 77 valves ( Gold Lions ) are tickling my fancy especially at the glowing reviews they seem to receive ?.
Anyway I just wonder if others have swapped around with the output valves in this amp ?. Thrilled how the old boy is now sounding btw ( smiley face )