Koss ESP-6 Electrostatic Headphones

[Dave Compton]

I recently aquired a pair of these headphones.
I was wondering if anyone remembers anything about them; their
acceptance in the marketplace, technical features, reviews, etc.

They have no power supply, and I'm curious how they charge the
diaphragms. Basically they connect to the speaker outputs of an amp
through some low resistance resistors with a cap across the resistors,
like cathode biasing.

They sound good, and can get too loud for me.

TNKS
Dave

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Before you buy.

[Barry Waldron]

In article <8a0ifs$rhh$1...@nnrp1.deja.com>,

Dave Compton <dcdco...@my-deja.com> wrote:
> I recently aquired a pair of these headphones.
> I was wondering if anyone remembers anything about them; their
> acceptance in the marketplace, technical features, reviews, etc.

I do not remember any of the specifics, however, Koss ES headphones
have always been well regarded. The important factor is how YOU like
them. The company has always had and electrostatic product in recent
years.
`

> They have no power supply, and I'm curious how they charge the
> diaphragms. Basically they connect to the speaker outputs of an amp
> through some low resistance resistors with a cap across the resistors,
> like cathode biasing.

There is a HV bias supply mounted in one of the ear cups. Power to
operate the phones is taken directly from the signal input. The input
voltage from the amplifier is split, part is rectified and multiplied
by the internal power supply. It is a neat little trick that rids the
unit of an external black box and its umbilicals. The one drawback is
that the phones are a few ounces heavier.

Barry

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