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Old 18th July 2008, 04:04 AM   #1
Karl71 is offline Karl71  United States
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Default Pass Design to Drive ESLs?

Nelson -

Any suggestions as to which of your designs would drive a pair of Just Real Music Model .5 ESL panels? They spec at 2.5 Ohms min. at 12 Khz and have a nominal 6 Ohm impedence. I will cross over at 375 Hz to a 10" Seas 25F-EW woofer (Dynaco A-25 replacement). According to the builder, the sensitivity is ~ 86dB.

Of course, simpler the better. I have a 680 VA toroid with dual 30V, 10A sec.


Karl Lewis
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Old 18th July 2008, 05:06 AM   #2
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I have a pair of DIY aleph 2's running a set of ESL's (eraudio acorns) and I love them.
"Live each day as if it is your last"
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Old 18th July 2008, 07:36 AM   #3
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This question seems to have been asked many times in the past. try a search for 'amp for esl' or something similar in the pass forum.

here are a couple of examples

Aleph mods for quad 57?

Pass Amps and ESL speakers

I don't think its optimal but fwiw I sometimes drive my ESLs(eraudio ESLlll) with my F4, its gloriously musical even though it might be cosidered a budget approach, both from cost and power perspectives.


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Old 19th July 2008, 04:39 AM   #4
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The A75 can cope with low impedance loads and that is what Pass recommends for ESL`s

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Old 19th July 2008, 04:41 AM   #5
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Pass Amps for Martin Logans
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Old 19th July 2008, 09:31 PM   #6
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The XA.5 series is the most ideal at this point, but as a DIY, the A75
is your best best, I think.
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