Earthworks SR25 User manual

Technical Support
Should you have any questions regarding your
SR25 microphone please contact us:
e-mail: [email protected]
phone: [phone] (9a.m. – 5p.m. ET)
For warranty and product return/exchange
information please refer to the back of the
enclosed Calibration Chart.
Earthworks, Inc.
37 Wilton Rd.
Milford, NH 03055 USA
Phone: [phone]
Fax: [phone]
http://www.EarthworksAudio.com
Made in U.S.A.
SR25 Cardioid Microphone
Owner’s Manual

Description
Earthworks SR25 is a directional prepolari-
zed condenser microphone with a first-order
cardioid pickup pattern directly coupled to a
dedicated wideband, low output impedance
transformerless preamplifier. The SR25 requires
a standard 48V Phantom Power supply. It
features a flat frequency response from 50Hz to
25kHz (Fig. 2), fast impulse response (Fig. 3),
very low handling noise, uniform polar pattern,
and high SPL handling capabilities. It provides
excellent uncolored rejection of sounds arriving
off-axis.
The SR25 is protected by US Patent No.
6,091,829.
Applications
Earthworks SR25 is easy to operate. Connect
the microphone to a microphone preamplifier
supplying 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 powered up.
Make sure to mute the signal to speakers or
headphones when phantom power is first
applied.
The SR25 is designed specifically for drums
and percussion and is the model that comes in
the Earthworks Drumkit™ System. The SR25
has a brilliance that is ideal for drum overheads,
percussion, Leslie, guitar and bass. Alone or in
combination with Earthworks KickPad™ it is
perfect for kick drum. The SR25 is a versatile
microphone for general studio and stage use. Its
uniform pickup pattern results in remarkably
open sound, while 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 Microphones
Earthworks SR25 microphone is a precision
instrument designed and built to provide years
of top performance. Following these simple
rules will help to protect your investment in the
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.
Specifications
Frequency response: 50Hz to 25kHz ±2dB
at 6 inches (15cm)
Polar Pattern: Cardioid (Fig. 4)
Sensitivity: 10mV/Pa (-40dBV/Pa)
Power Requirements: 48V Phantom, 10mA
Peak Acoustic Input: 145dB SPL
Output: XLR (Fig. 1)
Output Impedance: 100Ω, balanced
(50Ωea. pin 2 & 3)
Minimum Load: 600Ωbtw. pins 2 & 3
Noise: 22dBA equivalent
Dimensions L x D 165 x 22 mm
(6.5 x .860 in.)
Weight: 160g (.35lb)
Compliant
Fig. 1. XLR Output Connector Assignment of SR25
Fig. 2. Frequency Response (Typical) of SR25
Fig. 3. Impulse Response (Typical) of SR25
Fig. 4. Polar Response (Typical) of SR25
Specifications are subject to change without
notice.