Hi all ML owners,
I have had been usin my Sequel II - Martin Logan's fantastic ESLs since Aug. 1990 !!! I had my first issue with one panel only after 3 months of use, (Balance issue) I noticed that the sound "moved" to the left area of the speaker yet in almost full db., I have contacted ML and got a brand new pair of panels shipped by airplane to Israel free of charge, after installing the new pair the speakers worked 20 years without any degradation signs until recent year after moving to my new home by the sea-shore... that the sound got weaker and weaker from the static section yet evenly. I have read your comments in this forum and I am going to check several parts, btw, after air-conditioning the room the sound level from the stat gets much better.
1. Power supply (Required HV voltmeter range that is not a common one)
2. Capacitance of the Hi frequency crossover's capacitors in each speaker.
(I hope the value is registered on them)
3. The "corona" damages mention before.
4. I used to work for CISCO SYSTEMS back then, and remember using a static
Electricity measuring device, I may borrow one and hope to get some
Information out of it and for your information, if you unplug the AC and the sound immediately drops it means that the problem is more likely has to do with the level of the power supply voltage.
Please contact me if you would like to share your experiences hereto.