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Matching serial numbered pair, function flawlessly and excellent cosmetically. Local pickup preferred(in in the DC area) but shipping can be arranged. $500 Would trade for a new or like new plate amplifier with~1000w output.

To conclude this thread, I received the other new op amp and I now have two functioning towers. I know that I'm very fortunate that this was the only issue in the circuit, so I'll try to enjoy these as long as I can. For being an entry level speaker, I'm very happy with these. Very solid from...

I almost gave up and ordered new hv boards, but the 12 week lead time along with $300 each urged me to stay the course. Previous owner would probably be kicking themselves if they knew it was cheap fix. I started this project about a week before Thanksgiving, so it did take a good bit of free...

When I mentioned it to Ron(ML customer service), I wasn't 100% sure that was the issue. But he confirmed that it was possible that those could malfunction after a surge. So he sent me only one to try out. I'll have to order another one to get the second speaker back up and running.

The new opamp arrived today. I installed it onto the board while still disconnected from everything, then I gave it 120v and a signal, and the led came right on. So I wired it back up to the cabinet, and that did the deed. Panel is back to life! I did not even try the new transformer because I...

They did pry up with a little gentle effort. Boards have been disconnected for days so they're fully discharged. I ordered replacements from customer service and will report back with findings.

If this is what you're referring to, then yes I did try testing it but didn't get any steady readings.

That would make life much simpler indeed! I still replace just the transformer for now and see if that fixes the issue.

Understood, so you replaced the entire power supply board correct, not just individual components?

So the fluctuating readings is normal? Did you fix your issue and if so, how? I'm newer to Martin Logan products, but as an electrician I've been fascinated by the electrostat concept for years. I also own the Cinema center channel and Script surrounds and those have been flawless for about 3...

That might be it. The led does not illuminate even with signal. I just received the replacement hv transformer from customer service, so in the coming days I'll de-solder the old and re-solder the new.

So that transformer doesn't seem to be the issue. I did the bias voltage test and did not get the 17-30 volts DC that I was supposed to. How often does the step up transformer go bad?

Is that the same as this test? I found this in another forum and tried it, mine read about 260v on both speakers.

Hello, I'm a new member here. I've recently picked up a pair of Aerius speakers from someone who said that stopped working after being hit by a power surge. However, he was very vague about what exactly happened and didn't seem to have an electrical background so I'm trying to approach this...