Reply
 
Thread Tools Display Modes
  #1   Report Post  
Posted to rec.audio.high-end
Avigdor Jakubinsky Avigdor Jakubinsky is offline
external usenet poster
 
Posts: 1
Default Martin Logen's ESL Sequel II Laboratory and other tests

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 sp=
eaker 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 th=
e 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 you=
r 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 =
=20
Electricity measuring device, I may borrow one and hope to get some =20
Information out of it and for your information, if you unplug the AC a=
nd 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.

Best Regards

Avigdor Jakubinsky=20
www.dorylux.com
972-54-4424848


  #2   Report Post  
Posted to rec.audio.high-end
Peter Wieck[_2_] Peter Wieck[_2_] is offline
external usenet poster
 
Posts: 137
Default Martin Logen's ESL Sequel II Laboratory and other tests

Three things:

a) ES Speakers, as a class, really do not like humidity.
b) ES Speakers, as a class, really do not like polluted air, especially particulate pollution.
c) AC, properly sized in capacity, reduces both significantly.

Prescription:

i) DO check HV level.
ii) DO check the connection(s) to the Mylar panels.
iii) Exceedingly carefully: Do clean the panels and connections.

Particulates build up on the Mylar panels as many of them can carry a charge - and, in part, how electrostatic air cleaners work. They will also build up on the connection(s) and cause corrosion. Add humidity to the mix, and things get infinitely worse.

Put another way, if one wants planar speakers in any climate that is not either naturally dry *and* free of particulates, or maintained as such 24/7/365, go with Maggies.

Peter Wieck
Melrose Park, PA
Reply
Thread Tools
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sequel II cleaning [email protected] Pro Audio 1 August 16th 07 10:36 PM
Music Man HD-130 sequel. David Farber Vacuum Tubes 5 April 8th 06 03:22 PM
CHEAP guitar for Recording sounds like Martin DM or Martin D-1---Seek advice nooob Pro Audio 6 March 15th 05 06:51 PM
old farts only (the sequel) Bob Pro Audio 19 October 8th 04 08:04 AM
old farts only (the sequel) Bob Pro Audio 0 October 4th 04 07:39 AM


All times are GMT +1. The time now is 11:53 AM.

Powered by: vBulletin
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Copyright 2004-2023 AudioBanter.com.
The comments are property of their posters.
 

About Us

"It's about Audio and hi-fi"