Help with Martin Logan Quests.

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.

Shahens, since I am bi-amped and use the speakers passive crossover, the amps are still seeing full bandwidth. An active crossover takes some load off each amp but I can't do that with these speakers. You mentioned installing an inline resistor and that is something I've thought about on the input to each amp to remove some of the frequencies that will be remove by the speaker crossover. Did you install the resistors before or after the amp?

Thanks, and happy holidays to everyone.

Rives, you are probably correct to encourage me to replace the panels. I'm not ready to spend the money for a new pair. New panels would sound better anyway, but what about circuit upgrades. Should I have someone replace circuit components with improved parts? I've done this with box speakers before and had good results.

Both times I have had this problem, it went away after a few hours. When it happened on Monday, we had just painted part of the house (away from the speakers), and had opened the house to clear the smell. We live in South Texas and humidity is always a problem. On top of that it rained some that afternoon. We closed the house and turned the AC on around 6 pm and the problem was gone by 10 pm.

Thanks for the help.

I would call Jim Powers at Martin Logan. Tell him the problems and the results--particularly the last story. While, I can share my experience with my Martin Logans (and a few friends), he hears hundreds of experiences and works to resolve them. He is a great resource and can likely tell you if it's the panels or possibly something else. My guess is that it's the panels and the combination of high humidity--but would be interested in what Jim tells you. He can also tell you what circuit updates were made and if they make sense for you. Your speakers may not have the auto off/on which could be a significant upgrade being in a high humidity area--they increase panel life quite a bit. Mine didn't have this either, but I just created a manual method that I used to accomplish the same thing.