Help with Martin Logan Quests.


I have an original pair of ML Quests that have served me well for several years. I seem to be having problems with the panels sounding weak or losing volume. They still play but at a much reduced volume compared to the subs. I have substituted other components and think the problem is with the speakers.

Has anyone experienced problems with the electronics or panels that might fit this description?

If these need to be serviced, does anyone know who can do the work and maybe do parts upgrades in the process?

Thanks for your help.
gofaststang

Showing 4 responses by gofaststang

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.
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 like to thank everyone for their comments.

It has been a week since the problem occured, and the speakers are working fine. I think it was a humidity problem as described in an earlier post. I still think I need to begin considering new panels, but can probably squeeze a little more life out of these.

Best regards.