Shure Models 315 and 315S Gradient bi-directional ribbon microphones
General The Models 315 and 315S are compact and rugged ribbon mics combining wide range response and a bidirectional pickup pattern. The bidirectional pattern reduces noise and reverberation providing the same control as an equivalent cardioid microphone. The Models 315 and 315S are ideal for high-quality public address, theater stage sound systems, and recording applications. Due to the bidirectional polar pattern, they may be used for either single performer, a dialogue or group, solo or orchestra, and other individual or chorus applications.
The Models 315 Gold and 315S Gold feature a gold-colored finish. Specifications in other respects are the same as for the standard models.
Microphone Features
Wide-range front and rear response
Bidirectional polar pattern, effective over wide frequency range
Convenient impedance selection
A strong detachable cable especially selected for good shielding from “hum” pickup
A self-adjusting swivel permits aiming microphone at source of sound
Rugged mechanical design with special ribbon protection
The Models 315 and 315S are multi-impedance for connecting into mic inputs rated at 25 to 50 ohms, 150 to 250 ohms, or into high-impedance mic inputs. The low impedances are recommended where long cable lengths are required or under conditions of severe hum disturbance. Cable length is almost unlimited, since neither response nor level is appreciably affected. For use with high-impedance amplifiers, the Shure Model A95UF Line-Matching Transformer is available for coupling the low impedance line to the amplifier input.
Impedance Selection Selection of the various impedances is accomplished by removing a plate and changing the position of the switch at the rear of the microphone. The switch positions are marked “L” for low impedance (25-50 ohms), “M” for medium impedance (150-250 ohms), and “H” for high impedance (35,000 ohms).
Frequency response: 50 to 12,000 Hz (see Figure B)
Polar Pattern: Bidirectional, equally sensitive at front and back. Response at sides down 15 to 20 dB from front and rear responses (see Figure C)
Switch: Model 315 none, Model 315S built-in “ON-OFF” switch to control microphone circuit. The switch is an integral part of the receptacle assembly and is a slide-to-talk locking type switch
Case: Chrome-plated die cast
Net Weight: 1 pound (454 grams)
Introduced: 1952
Discontinued: 1977
Photographs courtesy of Dennis Schrank
The following three photos are also courtesy of Dennis Schrank, and portray the Shure 315S microphone. Note the switch.
Microphones on this site are not for sale. This ad is provided for historical purposes.
