Question on a Levinson 27.5 amp

I have a 23.5 (very similar to your 27.5) for 16 years now. For years, I turned it on and off at the beginning and end of each listening session -- this because it was part of a bi-amped system with a pair of tube monoblocks. So when the tube amps were powered down, I just turned off the Levinson too.

For the last couple of years, I've been using the 23.5 only. I turn it on every morning, and off every night, and the rest of the system stays on. During monsoon season (just ended, with lotsa lightening!) when a thunderstorm is approaching, I turn off both power conditioners and the whole system is shut down.

In all that time (knock wood!) I've never had a problem due to power surges or lightening strikes. And the 23.5 ? Sounds as beautiful as the day I bought it. As a side note, according to the watt meter on my power conditioner, it takes about 5 minutes after turn on for the Levinson amp to settle down to a constant idle current.

Kowkow, please forgive me if you already did this, but did you check the fuse on the "dead" channel?

Whoaru99, if your amp is "working OK" but you just want to see if it's performance is "up to snuff", just take it to any local audio technician and have him put it on his signal generator and he'll check the output on his ocilloscope. He can tell you many things from this simple test. And that's probably what Levinson would do anyway, at least to start with.

Ading, I have a Madrigal schematic for a 23/23.5 voltage change. I don;t know if it would apply to your 27.5. It's pretty simple though -- a few jumper changes to the input board. So if your board is identical, it probably works the same way. Or you can just email Madrigal and (maybe! ;-) they'll send you a PDF file for the 27.5.

In any case, if you'll send me your email address, I'll send you what I have.

Neil
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