General Information

Serial #

76-1997

Part Number

1

Total Parts

4

AKA

N/A

Patents

N/A

General Description

STEEL HEADBAND; FOAM RUBBER HEADBAND CUSHION; VINYL COVERED EARPHONE CUSHIONS; SYNTHETIC EARPHONE CASINGS, HEADBAND COVER, CORD COVERING, PLUG CASINGS, PARTS; METAL PLUG & PARTS

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

21.5 cm

Width

18.7 cm

Height

N/A

Thickness

10.0 cm

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Radio

Sub-Category

N/A

Manufacturer

AKA

KOSS

Country

United States of America

State/Province

Wisconsin

City

Milwaukee

Context

Country

Canada

State/Province

Ontario

Period

GENERAL: LATE 1960'S EARLY 1970'S

Canada

PART OF COLLECTION (1972.0318; 1972.1332-1346) OF "STEREOPHONES" DONATED (WITH TRADE LITERATURE) TO NMST IN 1972 BY KOSS. CORP. OF MILWAUKEE, WIS., ALL EXAMPLES OF KOSS "PRODUCT LINE" OF THAT PERIOD. KOSS HAD MADE SIMILAR DONATION TO SMITHSONIAN (SEE PHOTOS, PRESS RELEASES & CORRESPONDENCE IN SUPP. INFO. 1972.0318).

Function

ELECTROACOUSTIC DEVICE WHICH TRANSFORMS ELECTRICAL WAVES INTO AUDIO SIGNALS, WORN OVER EARS BY LISTENER.

Technical

IN 1968 KOSS ACHIEVED ENGINEERING BREAKTHROUGH WITH INTRODUCTION OF FIRST EXTRA-WIDE RANGE HEADSETS UTILIZING ELECTROSTATIC SOUND REPRODUCTION. ESP-6 WAS FIRST ELECTROSTATIC HEADSET (PRODUCED FROM 1968 TO 1973), & PRODUCED NINE OUT OF TEN AUDIBLE OCTAVES. SOLD FOR $95.00 IN 1971 (REFS. 1-5).

Area Notes

Unknown

Details

Markings

PLATE ON EACH EARPHONE READING "[LOGO] KOSS/ ESP.6A/ ELECTROSTATIC STEREOPHONES"

Missing

APPEARS COMPLETE

Finish

TEXTURED BLACK EARPHONE CASINGS & HEADBAND COVER; BLACK EARPHONE CUSHIONS, CORD COVERING, HEADBAND CUSHION, PLUG CASING; PLATED KNOB & HEADBAND; BRUSHED METAL TRIM ON EARPHONES

Decoration

N/A