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Old 29th March 2014, 06:48 AM   #1
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Default Acoustat III can be improved?

ACOUSTAT III can be improved?

I own this speaker and rebuilt the servo units by replacing all components but transformers.
Comparing the ACOUSTAT III with Martin Logan CLS there is a big difference between the two.
I was thinking to change the center unit of the ACOUSTAT III with a DIY unit of a same sizes but with a 6 microns film membrane.
I think can be a very interesting project.
There is some one who did similar DIY projects, built ESL by him self?
Any help and advises are very well come.
Best regards,
Williams
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Old 29th March 2014, 02:27 PM   #2
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Do your Acoustats have transformer interfaces which are used with your own external amplifier, or do they have the Acoustat ServoCharge amplifiers?
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Old 29th March 2014, 04:00 PM   #3
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hi,
i have internal transformers, external amplification
it is the medallion model
cheers,
Williams
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Old 29th March 2014, 04:06 PM   #4
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hi
some pics
williams
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Old 29th March 2014, 06:39 PM   #5
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There are a number of posts here about building panels, here's a good place to start:

How to construct a cube louver (Acoustat)

Nice looking speaker mod, btw. Very clean.
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Old 2nd April 2014, 04:24 PM   #6
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Quote:
Originally Posted by Williams Audio View Post
Comparing the ACOUSTAT III with Martin Logan CLS there is a big difference between the two.
In what way? What are you missing in the Acoustat?
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Old 4th April 2014, 07:06 AM   #7
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HI,

Well there is a difference
1 - in my room; Acoustat sounds louder
2 - Acoustat has more bass response
3 - Martin Logan is bright, responds quickly and is lucid
4 - Martin Logan has a very nice upper freq range , detailed
5 - If I could combine both SPK, I think it could be a super SPK
6 - This is why I think improving the high freq unit for Acoustat

Best regards,
Williams
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Old 4th April 2014, 11:34 AM   #8
HankF is offline HankF  United States
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Suggestion: replace the relatively thick "socks" with stretched Spandex and the HF will improve. Here is a post from a guy on this forum:
Quote:
When I made my Spandex socks I ended up with the fabric being half the circumference of the speaker, so it ended up being stretched to twice its size. This yields a semi-transparent look where you can just make out the grids of the panels if you look closely. Under normal viewing they just look like blue monoliths. They are far more acoustically open than the stock socks, though; the highs are much clearer this way. I'd never consider going back to the old socks, both in looks and sound.
I'm going to do that tweak after I update/upgrade my interfaces.

Last edited by HankF; 4th April 2014 at 11:59 AM.
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Old 4th April 2014, 01:50 PM   #9
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Get your speakers out of the corners, and do something with your room first.

A very very live room, one without any absorption and hard flat walls, hard tile floors will not favor good results from dipole ESLs like the Acoustat.

The ML has much much different low freq response - IF it is a full range, then it can not compete with the Acoustat. If you have a hybrid, then you are comparing a direct radiator cone with an ESL bass. The Acoustat probably has deeper and better bass than most of the ML line if it is properly placed in the room.

The other thing that is critical to what you hear is the amplification.
The Acoustat is like an open window to your amplifier and what comes before it.

Replacing the "socks" will not hurt at all...

...but the first step is to drop the reverberant level in your room and decrease the hard reflective surfaces.

Btw, the caps you have in the interface, in the HV section are likely not rated at a high enough voltage! They look to the eye like standard caps? They should be very high voltage rated. Perhaps they are, but this is important.

What else are you going to do in terms of "upgrading" your interfaces?
They look upgraded already?

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Old 4th April 2014, 10:01 PM   #10
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Hi all,
Thanks for the posts.
The room response it is very important, I know it.
But there is a WAF,,,,, this is a issue.
I will test some relocations and some thinks to soften the solid back walls of my room, as well few kinds of carpets in front of the SPK.
By the way the HV capas are WIMA rated at 6KV MKP.
The socks I have are new replaced, of a very transparent material that can see tru it very easily.
Any advises are very well come, I really love the Acoustat.
I drive it with ODISSEY AUDIO amps, pre and pwr.
Cheers ,
Williams
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