General Description

The Model SM94 is a unidirectional, electret condenser microphone tailored to the instrument miking needs of professional musicians and sound engineers in both live performance and sound recording. Its smooth, flat frequency response is free of either a “presence peak” or a low-frequency rolloff, making it a perfect choice for all types of musical instruments. The SM94 is equally at home in sound reinforcement systems or in sound studios and motion picture/TV scoring stages. When used with the optional windscreen, the SM94 can be used by vocalists and speechmakers who desire a wide, flat response with minimum coloration. The SM94 can be powered by any phantom power source, or by an internal 1.5-volt AA battery. The battery, which serves as a backup power source in the event of phantom power failure, can provide up to 5,000 hours of continuous operation. The SM94 is supplied with a swivel adapter for use on a microphone stand, boom or gooseneck, and a zippered vinyl storage bag. Model SM94-LC is supplied without a cable. Accessories include a foam windscreen (A3WS), two-channel phantom power supply (PS1A), and 7.6 m (25 ft.) microphone cable (C25J).

Specifications

Type

Electret Condenser

Frequency Response

40 to 16,000  Hz

Polar Pattern

Cardioid

Output Impedance

EIA rated at 150  Ω (200  Ωactual

Sensitivity

at 1kHz,open circuit voltage

phantom power -49  dBV/Pa(3.5  mV)
battery -50  dBV/Pa(3.2  mV)[1]

Maximum SPL

1 kHz at 1% THD[2]

phantom power 141 dB
battery 123 dB

Signal-To-Noise Ratio[3]

Ref. 94 dB SPL at 1 kHz

72  dB

Dynamic Range

at 1kHz

phantom power 119  dB
battery 101  dB

Clipping Level

1 kHz at 0.25% THD,1 kΩ load

phantom power 14  dB (0.63  mV)
battery 23  dB (0.71  mV)

Hum Pickup

typical, at 60 Hz, equivalent SPL/mOe

-3  dB

Polarity

Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3

Weight

Net 0.250  kg (0.55  lbs)
Packaged 0.949  kg (2.5  lbs)

Connector

Three-pin professional audio (XLR), male, balanced

Case

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

Environmental Conditions

Operating Temperature -6.7° to 49° C (20° to 120° F)
Storage Temperature -29° to 74° C (-20° to 165° F)
Relative Humidity 0 to 95%

Power Requirements

phantom power 11 to 52  V DC (1.2  mA)
battery 1.5  VAA batteries

Battery Life

Up to 5000  hours (alkaline)

Typical Frequency Response

Typical Polar Pattern

Block Diagram

① Capacitor Cartridge

② FET Impedance Converter With Active Load

③ LF Response Filter

④ Class A Compound Amplifier

⑤ RFI Filter

⑥ Balanced Transformer

⑦ Battery

⑧ Regulator/Reverse Voltage Protector

Overall Dimensions

Accessories

Furnished Accessories

Microphone Clip for SM58, SM57, SM87A, Beta 87A, Beta 87C, PGA57, PGA58, PGA48, PGA81

A25D

Carrying/Storage Bag

95A2313

Optional Accessories

In-line Switchable Attenuator

A15AS

Isolation Mount/Swivel Adapter for KSM109, KSM137, KSM141, SM63, SM81, SM94 and VP64

A53M

Black Foam Windscreen for PGA81, SM94 and SM137

A3WS

7.6 m (25 ft.) Cable (XLR-XLR)

C25J

Certifications

This product meets the Essential Requirements of all relevant European directives and is eligible for CE marking.

The CE Declaration of Conformity can be obtained from: www.shure.com/europe/compliance

Authorized European representative:

Shure Europe GmbH

Headquarters Europe, Middle East & Africa

Department: EMEA Approval

Jakob-Dieffenbacher-Str. 12

75031 Eppingen, Germany

Phone: 49-7262-92 49 0

Fax: 49-7262-92 49 11 4

Email: info@shure.de