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Old 1st March 2015, 03:32 PM   #1
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Default Martin Logan CLS Mk 1 Electronics Upgrade?

Hi

After lurking around this site for some time now it is time for my first post.

I have a pair of Martin Logan CLS Mk 1 with brand new ML panels but looking at the Electronics box attached to the panels have made me wonder if you could upgrade, improve or replace it? After all it is almost 30 years old.

The ML's are used in a system with active XO and room correction so maybe I could start by bypassing the filter in the interface box? Have anyone tried that?

Thanks in advance
Jasgaard
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Old 1st March 2015, 08:05 PM   #2
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Hello,
Without a schematic it is hard to guess.
i would start with replacing the power supply capacitors.
Be sure to get the same capacitance and voltage.
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Old 2nd March 2015, 07:09 PM   #3
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Hi,

Of cause you are right about the schematic.
I found a threat over at Martin Logan Owners mentioning tweaking the CLS Mk 1.

CLS I Tweaks

Here I also found the following attached schematics.

Hope it helps.
Attached Images
File Type: jpg Martin Logan CLS Mk 1 Schematic.jpg (70.6 KB, 30 views)

Last edited by Jasgaard; 2nd March 2015 at 07:22 PM. Reason: Forgot Picture
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Old 3rd March 2015, 11:41 PM   #4
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Post a photo of your supply.
Replace old electrolytic caps.
And replace the cheap film caps with your personal favorite film caps, and report back.
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