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Old 3rd February 2004, 08:20 PM   #11
VictorG is offline VictorG  United States
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Join Date: May 2003
Location: Albuquerque
Thank you for clarification SY. I am going to let the real EXPERTS answer from here on out. My expierience with estats is more practical.
Stewie: You there, fetch me the wall street journal. You two! Fight to the death!
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Old 3rd February 2004, 08:27 PM   #12
David M is offline David M  Canada
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Location: Vancouver
Building a basic ESL is not very difficult or expensive. The expensive part is the transformer and the amp to drive it.

The speaker itself is really just a few layers of inexpensive materials. Believe it or not, aluminum window screen works quite well if it is properly supported.

The transformer needs to be about 1:50. You can rewind an EI type or wind a toroid. Both Hammond and Plitron make suitable finished transformers (among others). I suspect the Plitron is best but it is very expensive and I have no experience with it. In general, look for transformers designed to step down a tube amp's voltage. Just use it backward--the transformer won't care it's just a hunk of wire.

The amplifier needs to be able to push a lot of amps to keep the transformer fed (it transforms the current into the volts you need). It also needs to be able to handle a very capacitive load with very broad ranging impedances. I'm not sure a gainclone will have what it takes.

All that said, I have to agree with others that an ESL may not suit your application. They are big and need lots of room behind them. can you mount speakers on the walls behind you instead?

To learn more these two sites are very helpful:


Good luck!

ps. Sander's book is very helpful for it's rules of thumb but don't take his explanation of the physics to seriously.
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