Microphone 13 of 249

Altec 639A

Amperite RA-L

American R331

Manufacturer:

American

Model:

R331

Country of Manufacture:

United States

Microphone Type:

Ribbon

Polar Pattern:

Figure 8

Production Start Year:

1953

Production End Year:

1962

Rarity:

Audio Recording:

Nylon string guitar recorded with the American D331 ribbon microphone.

Size: 1.1 MBFormat: MP3

Multiple quality options available

Impulse Response File:

Impulse Response file of the American R331 ribbon microphone.

American_R331_Sweep.png

Format: PNGSize: 0.0 MB

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Frequency Response:

Microphone History:

The R-331 was manufactured by the American Microphone company in Pasadena, California circa 1950. It was part of a family of microphones that included the hybrid ribbon/dynamic DR-330 and DR-332 models. The R331 appeared in Radio Masters Handbook and Stereo Hi-Fi Directory between 1953 and 1962.

This stylish microphone made a brief appearance in the 1985 time travel movie "Back to The Future" (at the end, where Marty sings Johnny B Goode....)

Technical Description:

Taken from a contemporary advert:

Frequency Response: 50-8000 Hz +/- 3.0 db.
Output Level: -55 db for high impedance (0db1 volt/dyne/cm²).
Polar Pattern: True velocity bi-directional.
Impedance: Easily and quickly changed to low (30-50) med. (250) or high (40,000) ohms.
Connector: Cannon XL-3-11 "latch-lock" connector.
Cable: 25 ft. single-connector shielded rubber covered.
Stand Coupling:"-27 thread on comb. swivel and "slide-lock."
Dimensions: Ht. 6 ins., dia. 2 ins., wt. 20 ozs.
List Price: Code: $75.00