Earthworks SR25 User Guide

Frequency Response of SR25 (typical)
Description
The Earthworks SR25 is a directional pre-polarized con-
denser microphone with a rst-order cardioid pickup pat-
tern directly coupled to a dedicated wideband, low output
impedance transformerless preamplier. The SR25 re-
quires a standard 24-48V Phantom Power supply. It fea-
tures a at frequency response from 50Hz to 25kHz, fast
impulse response, very low handling noise, uniform polar
pattern, and high SPL handling capabilities. It provides ex-
cellent uncolored rejection of sounds arriving off-axis.
Applications
The Earthworks SR25 is easy to operate. Connect the mi-
crophone to a microphone preamplier supplying 24-48V
phantom power using a standard XLR microphone cable.
Please allow up to one minute for the microphone to settle.
Plugging in the microphone “hot” (phantom power already
present at the input) will not damage the microphone, and
is actually preferred for faster settling. It is normal for any
phantom powered mic to “pop” when plugged in or pow-
ered up. Make sure to mute the signal to speakers or head-
phones when phantom power is rst applied.
The SR25 is designed specically for drums, percussion
and amplied instruments. The SR25 has a brilliance that
is ideal for drum overheads, percussion, Leslie speakers,
guitar and bass. The SR25 is a versatile microphone for
general studio and stage use. Its uniform pickup pattern
results in remarkably open sound, and its excellent off-
axis rejection reduces feedback and maximizes available
gain. A mounting clip is included with the microphone.
This microphone has no removable parts.
Care of Microphone
The Earthworks SR25 microphone is a precision instrument
designed and built to provide years of top performance. Fol-
lowing these simple rules will help to protect your invest-
ment in the SR25:
SR25
Avoid touching the front protective screen.
Never attempt to disassemble the microphone –
it cannot be opened.
Avoid extreme heat and condensing humidity. Allow the
microphone to warm up in the case when bringing it in
from the cold weather.
Rough handling may damage the microphone even if no
visible marks are left.
When not in use keep the SR25 in its case.
•
•
•
•
•
XLR Output Connector Assignment of SR25
Specications
Frequency response: 50Hz to 25kHz ±2dB at 30cm
Polar Pattern: Cardioid
Sensitivity: 10mV/Pa (Typical)
Power Requirements: 48V Phantom, 10mA
Peak Acoustic Input: 145dB SPL
Output: XLR-3
Output Impedance: 65Ω, balanced between pins 2 & 3
Minimum Load: 600Ω btw. pins 2 & 3
Noise: 20dB, A equivalent
Dimensions L x D: 165 x 22 mm (6.5 x .860 in.)
Weight: 160g (.35lb)
Impulse Response of SR25 (typical)
Polar Response of SR25 (typical)
Specications are subject to change without notice.

Earthworks SR25 Specifications

Frequency and Sensitivity

frequency response	50Hz to 25kHz ±2dB at 30cm
sensitivity	10mV/Pa (Typical)
noise	20dB, A equivalent

Power Requirements

power requirements	48V Phantom, 10mA

Acoustic and Output Specifications

peak acoustic input	145dB SPL
output impedance	65Ω, balanced between pins 2 & 3
minimum load	600Ω btw. pins 2 & 3

Weight and Dimensions

dimensions L x D	165 x 22 mm (6.5 x .860 in.)
weight	160g (.35lb)