Shure SM94 Specification Sheet

Product Speciﬁcations

SM94 Cardioid Condenser Microphone

Overview

The SM94 is a rugged, versatile flat-response cardioid condenser microphone, designed with a frequency response free of either presence peaks or low-end rolloffs, for use with live amplified and acoustic instruments. Additionally, the SM94 can be powered from one AA battery or phantom power, for remote recording applications and environmental conditions.

Features

• A sensitive mic with a wide, flat response ideal for live amplified and acoustic instruments.

• Extremely well-suited for reproduction of stringed instruments, woodwinds and cymbals

• AA battery or phantom power

• Internal shock mount

• Wide dynamic range

• Smooth, flat frequency response

• Uniform Cardioid condenser

• Frequency response: 40 to 16,000 Hz

Available Models

SM94 Includes Stand Adapter and Zippered Pouch

Specifications

Type Condenser

Frequency Response 40 to 16,000 Hz

Polar Pattern Cardioid

Sensitivity (at 1,000 Hz)

Impedance Rated at 150 Ω; 200 Ω actual

Output Clipping Level

(1 kHz, 3% THD)

Total Harmonic Distortion < 0.25% (130 dB SPL at 250 Hz into 800 Ω load)

Maximum SPL 800 Ω Load: 141 dB (phantom), 123 dB (battery)

Hum Pickup –3 dB equivalent SPL in a 1 millioersted field (60 Hz)

Output Noise (equivalent sound pressure levels;

measured with true rms voltmeter)

Dynamic Range 119 dB (phantom); 101 dB (battery) (maximum SPL, 2000–Ω load, to A–weighted noise level)

Signal-to-Noise Ratio 72 dB (IEC 651)* at 94 dB SPL

Overvoltage Protection

Polarity Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3

Power

Battery Operation

Connector XLR professional audio 3-Pin

Case Steel and brass construction with gray finish and stainless steel mesh grille

Net Weight 250 grams (8.8 oz) less battery

Open Circuit Voltage: –49 dBV/Pa (3.5 mV) (phantom) –50 dBV/Pa (3.2 mV) (battery) (1 Pa = 94dB SPL)

800-Ω Load–14 dBV (0.63 V) (phantom), 1% THD; –23 dBV (0.71 V) (battery), 3% THD

22 dB typical, A-weighted 25 dB typical, weighted per DIN 45 505

Maximum External Voltage Applied to Pins 2 and 3 with respect to Pin 1: +52Vdc Reverse polarity protected to 75 Vdc

Supply Voltage: 11 to 52 Vdc, (+) pins 2 and 3 Current Drain: 1.0 to 1.2 mA max. at 52 Vdc

Type: 1.5 V alkaline, AA size (NEDA 15A) Life: Up to 5,000 hours with fresh battery

SM94

Optional Accessories and Replacement Parts

A25D Microphone Clip A15AS Switch-Selectable Attenuator A53M Isolation Mount

A3WS Microphone Windscreen

Polar pattern

250 Hz 500 Hz 1000 Hz

2500 Hz 6300 Hz 10000 Hz

Frequency response

+20

+10

–10

–20

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