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Old 8th July 2011, 08:42 PM   #1
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Default F5 & ESL 57

Hello,

Just won a pair of ESL 57s on eBay and now thinking about a suitable amplifier. Will the F5 do the job? If not, any other Pass amps better suited?

Thanks,

Brian
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Old 8th July 2011, 08:46 PM   #2
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Not really knowledgeable in Pass amps, but what are the min ohms and sensitivity of the ESL 57s; and what SPL are you seeking . .
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Old 8th July 2011, 08:51 PM   #3
Marra is offline Marra  United Kingdom
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I believe the Aleph J would be ok. Boards from Peter Daniel.
Check this guys website.

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Old 8th July 2011, 09:05 PM   #4
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Is 25 wpc enough for the SPL you are seeking?
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Old 8th July 2011, 09:10 PM   #5
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If you had two Aleph 30 boards a side
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Old 8th July 2011, 09:19 PM   #6
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Default ESL 57 Impedance

The impedance ranges from 60 ohms in the bass region to 1.8 ohms in the treble region. They can be driven well from 15-25 watts of amplifier power, but the amplifier must be stable into a low impedance at high frequency. Does that describe the F5?

Brian
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Old 8th July 2011, 09:22 PM   #7
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any reason for favoring the F5?

Cheers
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Old 8th July 2011, 09:29 PM   #8
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I've used the F5 with my quads - sounds great, no bother to it driving them. But the F5 was not happy driving them stacked (wired in parallel).

But fire ahead with the F5.....
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Old 8th July 2011, 09:55 PM   #9
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Default "This amp just seemed to love the quads"

The Naksa Amplifier | TírNaHiFi.org

Just don't turn up the wick; and save on summer cooling

Last edited by otto88; 8th July 2011 at 10:00 PM.
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Old 8th July 2011, 09:56 PM   #10
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Default Why F5?

Why F5? Because higher powered amps can cause arcing and the 25 watt rating of the F5 seemed just right. Two amps from long ago that have the reputation of a good fit with the ESL 57s are the Bedini 25/25 and the Mark Levlinson ML-20 - both in the same power range. So if the F5 does the job with the difficult load, it would be ideal (and I already have Peter Daniel's F5 boards).

Brian
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