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The Shure Model 300
bidirectional ribbon microphone

Shure Model 300

The Model 300 ribbon microphone is a rugged stand-mounted unit with a wide-range frequency response and a bidirectional polar pattern. The Model 300 is an excellent choice for broadcasting or recording studios as well as for critical sound reinforcement ap­pli­ca­tions. The microphone’s symmetrical front and rear and its greatly reduced side pickup make it ideal for such uses as across-the-table interviews or dialogue, stages with loudspeakers directly to the side or overhead, and com­bined pickup of facing instrumental groups in recording sessions.

The Model 300 is supplied with a Voice/Music switch that provides either flat or rolled off low-frequency re­sponse and with an impedance-selection switch allowing choice of three rated impedances: “L” equals 38 ohms, “M” equals 150 ohms, and “H” equals high impedance. A built-in vibration isolator and internal ribbon protection make this mic suitable for a wide variety of applications.

Microphone Features

  • Ribbon microphone with wide range response

  • Switch selectable flat or rolled off low end

  • Bidirectional polar pattern, ideal for interviews

  • Internal ribbon protection assures reliable
    operation under rigorous operating conditions

  • Built-in vibration isolator and lifetime swivel

  • Convenient impedance selection switch.
    Microphone is usable with all amplifiers
Shure Model 300


  • Frequency response: 40 to 15,000 Hz (see Figure 1)

  • Polar Pattern: Bidirectional—uniform with
    frequency; symmetrical about axis
    (see Figure 2)

  • Switches: Rotary Voice/Music response switch
    and rotary impedance selection switch

  • Swivel and Shock Mount Assembly: Positive action, permits tilting head through 135°, shock-mounted with internal rubber vibration isolator, suitable for mounting on stand with ⅝"-27 thread

  • Case: Dark gray enamel die casting and
    light gray brass screen

  • Net Weight: 581.5 grams (1 lb, 4 oz)

  • Cartridge: R30

  • Introduced: 1952

  • Discontinued: 1982
A stereo pair 1977 300 advertisement

From the 1977 Shure Professional Products booklet.

Voice-Music selector switch

The Voice-Music frequency response selector switch.

Shure 300 frequency response Stan's 300 Shure 300 with Shure S33B desk stand

Shure 300 with Shure S33B desk stand.

Shure 300 polar pattern Overall dimensions Impedance selector cover Impedance selector switch

Impedance selector switch.

Internal connections Shure 300

Download the Data Sheet for this mic.

Shure Model 300 ad

View a wide ad for the Shure 300

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