Levinson 20.5 monos - Time for a Refurb?

Joe, from your further explanation, it might not be your amp (or any other component) at all. First thing I would do is swap the signal leads to your amp and If the "noise" stays on the same speaker, then it's the amp -- but not necessarily something wrong in the amp! -- it could still be powerline noise. So get a really stout (12AWG preferably 10 AWG) shop type extension cord (just long enough to reach you EP-15A -- fabulous unit BTW) and plug your amp into it. You'll know right away if it's something actually IN the amp, or lotsa line noise (which interestingly enough, can sometimes manifest in only one channel ;--)

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Okay, you guys have done a really great job of giving me the pros and cons of going ahead or not going ahead with sending my 20.5s to Levinson for their first ever checkup and any parts replacement necessary to put them back on spec. I really do appreciate your time and thoughts whichever side of the argument you came down on.

That was a really great suggestion about the Service manual for the 20.5s. That never occurred to me in audio. I used to do a lot of my own work on my cars and I always used to get the service manual whenever I bought a new car. Levinson no longer has the service manuals available for their older discontinued models. Does anyone know if they are available anywhere else?

I now have the RMA #, so I now have 3 options:

1. I can send them to Levinson next week or the week after. The Levinson tech guy said that the turnaround time would be 2 - 3 weeks. In audio, I have found that manufacturers always take 2 - 3 times longer than they tell you to deliver the product. That means I will likely be without my amps for 6 to 9 weeks. I would not want to have my system down for that long. Any thoughts on something I might pick up on the 'Gon and resell in 2 or 3 months for at or near the price paid?

2. I can pull the top covers off and inspect the caps for leaks, cracks, etc., and then decide whether to send them in now or not.

3. I can replace the 20.5s and invest the money I would have spent on the maintenance as well as the sale price of the 20.5s in new or newer amps. I was thinking about replacing them next year with Ayre's new monoblocks anyway. Alternatively, since I have always been an ss guy, I could buy a pair of used tube amps on the 'Gon and try them out with the option of selling them for little or no loss if I decide I want to remain an ss guy. If I went this route I would want to get tube amps that are a good fit with my new Ayre K-1xe preamp and Wilson Sophias, meaning in part that they would need to be balanced and accept a balanced interconnect cable from the preamp.

As always, thanks for your time and thoughts.

Ed

Ed, If you like the way the Sophias sound w/ the ML 20.5s, you're not going to find better ss amps for anywhere near $8K, which is what the 20.5 + refurb. at ML would be worth max. Unless you want to buy a used pair of ML 33Hs for ~$10K, or maybe a DarTZeel for what? $30K?

So I say door #1. Have it done right at ML, before they lose THEIR service manuals. They'll really go over them with a FTC, and probably replace a lot of little parts too. You'll get a limited warranty on the new parts, I believe. And I think they're better than most on meeting their time estimates. Also you might ask them if, while they're at it, they'd install some proper 5-way speaker binding posts and replace the Camac inputs w/ RCAs! A lot of 20.5 owners have had this done (although I don't know if it was done at ML.)

I told you it wouldn't be cheap. :) I think at this point, you have to trust yourself.

Herman: At the moment it's a '64 Fender Super Reverb and a '62 Ampeg Reverberocket that need attention. The Fender did have some parts replaced around 15 years ago, the Ampeg is probably still original. The Fender obviously wants filter caps, the Ampeg surely needs more -- not only doesn't it sound well, but the last time I used it the panel got way too hot. It's actually somewhat remarkable to me how good the Fender continued to sound almost right up until it crashed, even garnering copious praise from other players who were pressed into using it onstage. But then a pre-CBS blackface Super is an all-time great amp.