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A lot has to do with the ESL!

Posted by Ralph on April 5, 2017 at 12:02:31:
Which one do you have in mind?

Martin-Logans are very low impedance as ML wants them to work with transistors. If these are planned you will need a set of ZEROs.

Sound Labs work nicely with OTLs but need some power. In most cases unless you have older SLs the amps should make at least 100-140 watts and more is better.

Quad ESL 57s don't need much power and so smaller OTLs can work. ESL63s work OK with 60 watt OTLs but work with more power; 100-150 watts works very well with them.

There are some pretty profound differences here so its important to understand how they will work together!