Biasing SS heads??

[jeffbrown]

OK, so I just read the thread about biasing the Ampeg 3 Pro heads. Because I'm crazy/detail oriented sometimes, I'm wondering about my Peavey MK VIII XP head. It is working and sounding fine - I think, LOL - but would it sound better if it had a tune up? I have had it for years, it has never given me any problems, and has never been in the shop. I am in NO WAY qualified to dig into this thing's guts, and I'm wondering if there are techs in my area (NH) who ARE qualified/willing/able to go into it and do nice things.

I did do a search, and found nothing on biasing this head. Any help would be appreciated.

 

[B-string]

It's my understanding the double diode specially selected on the output heatsink controls proper bias.

 

[agedhorse]

Bias is fixed by design. Not adjustable (assuming it uses the PA-400 module or similar).

 

[jeffbrown]

Ok, thanks! What I wanted to know, what I needed to hear.

 

[BassmanPaul]

The only time I have had to bias a SS amp is when the amp was first powered up and after a repair to the output section.