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Chip Amps Amplifiers based on integrated circuits

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Old 28th April 2004, 03:26 PM   #1
Few is offline Few  
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Default chip amps for ESL's?

Question:
Is there any hope for using chip amps to drive electrostatic loudspeakers? Under the (faulty?) assumption that large capacitive loads will be problematic, I wondered if it might be possible after dividing the ESL panel into smaller electrically isolated sections, and driving each section with its own chip (to cut down the capacitance seen by each amp). Any sense of which amps would be particularly well or poorly suited to the task?

Background (OT for chip amps):
It's been shown that small inexpensive transformers can be used for small ESL panels, so I'm imagining a battery of chip amps each with its own transformer. I was thinking about driving each ESL panel (and therefore amp/transformer) with a signal that is delayed or filtered differently than the neighboring panels, in order to control directivity and frequency response. They would be like actively filtered versions of the original Quad ESL(with filters) or newer Quad ESL's (with delays), expect I'd be aiming for cylindrical wavefronts rather than spherical ones.
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Old 30th April 2004, 08:24 AM   #2
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Default I am using them with Hybrides

For a week now I am using the BrianGT gainclone to van Medevoort Hybrid ESL (ESL approx. > 400Hz)

I did a run in with GC on Celestion 3 speakers. Compared to the Rotel RB 850's I have a major improvement.

Now using them on the ESL/dynamic combination, with the intention to build an active filter.

The performance is excellent. Stable sound image, rythmic bass.

One worry though, the GC runs at a much higher temperature, still touchable.
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Old 30th April 2004, 08:26 AM   #3
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All ok with ML Aerius I

chip raise temp considerably but nothing to worry about.

Bye!
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Old 30th April 2004, 12:30 PM   #4
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The LM3886 may be a wiser choice over the 3875 due to lower impedence dips of ESL.
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