What amp do you use to drive original Quad ESL's

I owned them for many years. While I never tried it, I understand that the Pass Aleph amps are a wonderful match.

What are you referring to as original? The 57 (1st model-original) or 63 (much more traveled model)? Both are great with Jadis amplification. The Alephs are also good, as Drubin suggests. Many good tubes will do.
BTW, you can't drive these speakers "full-range" -- only their range, which a bit short of fullrange. A good sub is recommended.
BTW, there are sites recommending some such quad/sub combo's -- now if I could only remember them...

Try www.quadesl.org

Go to the section on amplifiers. There is a list including critique about the good and the bad of many recommended amps.

Jon

Bedini 25/25, Levinson ML-2, Futterman OTL, Pioneer Series 20, Rappaport Amp 1, Berning EA-230, MacIntosh MC-225, all my favorites and temporally correct.

I like the bedini 25/25 and the VTL TT25.