Who made it, ESL powered amp

Williams Audio · 2nd November 2005, 08:19 PM

hi, i am asking if some one had the knowledge about a HV PWR AMP in the ESL that will substitute the audio step trafo. what PS
will be used, lets say for the quad 63 for exemp. I do have
a block diagram but i am not sure.
best regards
Williams

I_Forgot · 3rd November 2005, 12:31 AM

Acoustat made a direct drive amplifier for ESLs.

The ESL-63 has transformers for drive from a low impedance, low voltage amplifier. If you want to drive an ESL-63 from a HV amplifier, you will have to go into the speaker and remove/disconnect the audio transformers and bring out the connections to the delay lines, diaphragms, and bias supply.

I_F

Williams Audio · 3rd November 2005, 06:47 PM

hi,
i know Acoustat had the active ESL with some hi pwr tubes, I never listened to it, do you know the model no. or by any chance
can you get the schematic. Generally what do you think about it, this is a big project, is worth it?
Replacing the step up trafo by direct amp, looks to be a better way to drive the units.

Best regards
Williams

dr.strangelove3 · 3rd November 2005, 11:21 PM

You could take a look at ultranalog at the Phylira amplifiers. The Phylira are 845 based Direct Coupled ESL Amplifiers.

2nd November 2005, 08:19 PM	#1
Williams Audio diyAudio Member Join Date: Apr 2004 Location: far away	Who made it, ESL powered amp hi, i am asking if some one had the knowledge about a HV PWR AMP in the ESL that will substitute the audio step trafo. what PS will be used, lets say for the quad 63 for exemp. I do have a block diagram but i am not sure. best regards Williams __________________ williams audio

3rd November 2005, 06:47 PM	#3
Williams Audio diyAudio Member Join Date: Apr 2004 Location: far away	hi, i know Acoustat had the active ESL with some hi pwr tubes, I never listened to it, do you know the model no. or by any chance can you get the schematic. Generally what do you think about it, this is a big project, is worth it? Replacing the step up trafo by direct amp, looks to be a better way to drive the units. Best regards Williams __________________ williams audio

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3rd November 2005, 12:31 AM	#2
I_Forgot diyAudio Member Join Date: Jan 2005 Location: Phoenix, Az.	Acoustat made a direct drive amplifier for ESLs. The ESL-63 has transformers for drive from a low impedance, low voltage amplifier. If you want to drive an ESL-63 from a HV amplifier, you will have to go into the speaker and remove/disconnect the audio transformers and bring out the connections to the delay lines, diaphragms, and bias supply. I_F

3rd November 2005, 11:21 PM	#4
dr.strangelove3 diyAudio Member Join Date: May 2004 Location: Leeuwarden	You could take a look at ultranalog at the Phylira amplifiers. The Phylira are 845 based Direct Coupled ESL Amplifiers.

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