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Old 31st January 2013, 11:26 AM   #11
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Question Full Range Transformer

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Originally Posted by CharlieM View Post
...As I said earlier, this setup is not suitable for a full range ESL...
Any experience on what transformers we needed for a full range ESL and why?
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Old 31st January 2013, 11:55 AM   #12
Bazukaz is offline Bazukaz  Lithuania
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Quote:
Originally Posted by Ulf Eliasson View Post
Any experience on what transformers we needed for a full range ESL and why?
Read my post #8 in this thread.
For full range ESLs you need mains toroids that have higher voltage on the outer winding to prevent core saturation in low frequencies.
1) For A semi-full range crossed to a subwoofer in 70-100Hz 12:230V transformers should be enough assuming active crossover is used. That's if you don't plan to use amplifier more powerful that about 80W/8Ohm.At least 4 or better 6 will be needed to obtain a reasonable total turns ratio.
2) For a complete full range no less than 20:230V transformers may be required and one would end up having to use 8 of them just to get turns ratio close to 1:90. IMO that would be more expensive than buying specialized trannies.

Last edited by Bazukaz; 31st January 2013 at 11:57 AM.
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Old 2nd February 2013, 12:48 PM   #13
john65b is offline john65b  United States
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Bazukas, You are using a LM3886 on ESL panels? That poor amp! What rails are you at? How's it sound?

I have always wanted to try them (I have a few LM3886 and LM4780 modules just sitting around)
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Old 2nd February 2013, 02:38 PM   #14
Bazukaz is offline Bazukaz  Lithuania
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Quote:
Originally Posted by john65b View Post
Bazukas, You are using a LM3886 on ESL panels? That poor amp! What rails are you at? How's it sound?

I have always wanted to try them (I have a few LM3886 and LM4780 modules just sitting around)
To me it sounds good. I would not consider it a poor amp. Low distortion and robust. Has a current limiting of around 11.5A according to datasheet which is not bad either. However quite sensitive to PCB layout.
I am running it at +/-34V.
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