McIntosh A-116 A116 Biasing and tube swap

Hello all:

Just had a quick question. I've recently obtained the McIntosh A-116 Monoblocks and one of the 12BH7 tubes was DOA. I've read that I could swap it out for the 12AU7. Is that true? Also Can anyone share with me how to set the bias on the amp and if anything needs to be done so that I can use the 0.5 input terminal? Thanks in advance!

Showing 2 responses by neway317


Thanks for your advice on what do to.. Right now I'm in the process of searching for some 12BH7 replacements on eBay. Turns out that one of monoblocks came DOA, not just the tube. So now I need to find a guy to fix it up and see what's going on with it. Any recommendations? I've heard a lot about Terry DeWick but I'm just not in the mood to ship it again. I'm in the local NYC metro area. Although on one channel though, I was pleasantly surprised that the amp was able to push my Maggies even at higher levels at 30 Watts.

They do give you that warm and fuzzy feeling inside

And thanks on the offer for the amps. Hope you have time to wait a while ;)

Thanks for the input, I was looking into getting replacement 12BH7s but didn't know where to start. Ithaca is still about a 3-4 hour drive for me unfortunately though. I went to the web site and there were "certified technicians" but nothing special nor were they ever mentioned to do quality work.

On a side note, Should I install some sort of ON/OFF switch on these puppies? Or just leave them on all the time? (which seems like a waste on the tubes.)