General Information

Serial #

7601500

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 CASING, 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

22.0 cm

Width

19.0 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: 1970'S

Canada

PART OF COLLECTION (1972.0318; 1972.1332-1346) OF "STEREOPHONES" DONATED (WITHTRADE 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 INTRODUCED FIRST EXTRA-WIDE RANGE HEADSETS UTILIZING ELECTROSTATIC SOUND REPRODUCTION & BROUGHT OUT ESP-6. SUBSEQUENTLY ELECTROSTATIC ESP-9 WAS DEVELOPED, PRIMARILY AS STUDIO MONITOR HEADSET FOR PROFESSIONAL USE; IT PRODUCED ALL TEN AUDIBLE OCTAVES. SOLD FOR $150.00 IN 1971 (REFS. 1-5).

Area Notes

Unknown

Details

Markings

PLATE ON EACH EARPHONE READING "[LOGO] KOSS/ Studio Monitor ESP.9/ ELECTROSTATIC STEREOPHONES"

Missing

APPEARS COMPLETE

Finish

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

Decoration

N/A