Audio Research Reference 75 se

Hello Phil,
You're right, I contacted Audio Research and they informed me that it should be a burned resistor next to the tube socket and it should be replaced.
I will send the 75se to mainland Portugal for repair.
It is in fact an excellent power amp, I love it, but six months ago I bought a new Pass Labs XA30.8 which is also a fantastic power amp... I also like it a lot...however at the beginning, with 60 / 70 hours of burning hated the sound...dark, without dynamics, attack and detail...a dreadful sound, I was already thinking of selling it...then I thought and plugged it into a tuner for more than 300 hours...when I plugged it back into my system I was amazed...I can only say that the two are fantastic and very similar in terms of sound...I will keep them both...
Regards,
Paulo

I had this problem with a VT100. There were a couple resistors that had to be replaced. Contact Audio Research and they will give you better help.
 I have the 75se and I love it.
Phil