Koss ESP-9 electrostatic Headphones Specifications

Sidebar: Specifications

Description: AC- or signal-powered electrostatic. Impedance: 4 to 16 ohms. Max input signal: 12W continuous program.
Dimensions: Headset weight, 19 oz. Cord length: 5½.
Price: $150 (1973); no longer available (2016).
Manufacturer: Koss Corporation, 4129 N. Port Washington Road, Milwaukee, WI 53212. Tel: (800) 872-5677, (414) 964-5000. Web: www.koss.com.

COMPANY INFO
Koss Corporation
4129 N. Port Washington Road
Milwaukee, WI 53212
(800) 872-5677
ARTICLE CONTENTS

COMMENTS
Herb Reichert's picture

I really love reading JGH's stuff - and this is a gem about an extraordinary product. But! I can't imagine saying this: "However, since most samples of the ESP-9s sound just a shade up at the high end and a shade down when using the 9' extension, this raises the possibility of getting perfectly flat response from them by using half the length of the extension (by cutting it and reconnecting one plug to the shortened end). We did not investigate this further, but see no reason why it would not work." in one of my reviews....hehehehe

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