Help with Martin Logan Quests.

First, check directly with MartinLogan--they are on the web if there is no dealer near you. Second, are the panels clean and tight? Third, sometimes the panels need to be replaced after "several years" of use. Fourth, the Quests are now at least 3 generations old--maybe it's time for new 'Logans (rather than spending money on repairs or upgrades). ;>)

Vacuum the panels. When I sent you the message I was in a hurry so there are grammatical errors that I did not correct. Here is the clarification. A second procedure is to vacuum out the electronics. Don't touch anything inside if you don't know how to dissipate the charge. And make sure everything has been disconnected for 24 hrs before you do anything including vacuum.

I spoke to a tech support at ML a few months ago regarding this same issue. He told me that there is a "life expectancy" for their ESL panels that range from 8-10 years depending on usage. After that, the above mentioned simptoms are normal. I own a pair of Sequel IIs and the cost of the panel replacements are $549 +SH. This comes with a ML 3 or 5 year warranty. The replacing procedure is pretty simple and your speakers will sound as wonderful as the first day you brought them home. My panels have not reached that point yet, but may soon. Till then, I came up with a smaller and cheaper (less that $10) but not the most "correct way" of reducing the bass due to room geometry. My Preamp does not have any bass or treble controls, so an inline resistor did the trick for me. I can give you more details about that if you're interested. Best of luck and happy listening.

Shahen

Thanks for the suggestions. The problem seems intermittent. They are working fine today. These were purchased around 93, so they may need new panels. I'll vacuum first.

The Audio Control equalizer has done the trick for the bass. It is an inexpensive but effective cure. I've thought about using a resister, but the room problems are too severe.

All of the advice above is good. Do vacuum the panels regularly, but honestly--it's time for new panels. M-L has made a number of improvements for their panels, and you will benefit from these as well as the fact that yours are probably near the end of their life expectancy--particularly if you live in a humid area which lowers the life expectancy.