Description
Earthworks SR25 is a directional pre-polari-
zed condenser microphone with a first-order
cardioid pickup pattern directly coupled to
a dedicated wideband, low output imped-
ance transformerless preamplifier.The SR25
requires a standard 48V Phantom Power sup-
ply. 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 capa-
bilities. It provides excellent uncolored rejec-
tion 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 preampli-
fier supplying 48V phantom power using a
standard XLR microphone cable. Please al-
low up to one minute for the microphone
to settle. Plugging in the microphone “hot”
(phantom power already present at the in-
put) will not damage the microphone, and is
actually preferred for faster settling. It is nor-
mal 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 pat-
tern 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 micro-
phone has no removable parts.
Care of Microphones
Earthworks SR20 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 SR20:
•Avoidtouchingthefrontprotectivescreen.
•Neverattempttodisassemblethemicro-
phone – it cannot be opened.
•Avoidextremeheatandcondensinghu-
midity.Allow the microphone to warm up
in the case when bringing it in from the
cold weather.
•Roughhandlingmaydamagethemicro-
phone even if no visible marks are left.
•WhennotinusekeeptheSR20initscase.
Specications
Frequency response: 50Hz to 25kHz ±2dB
at 1 foot (30cm)
Polar Pattern: Cardioid (Fig. 4)
Sensitivity: 10mV/Pa (-40dBV/Pa)
Power Requirements 48V Phantom, 10mA
Peak Acoustic Input: 145dB SPL
Output: XLR-3 (Fig. 1)
Output Impedance: 100Ωbalanced
(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: .35lb (160g)
Compliant
Fig 1. XLR Output Connector Assignment of SR25
Fig 3. Impulse Response (Typical) of SR25
Fig 4. Polar Response (Typical) of SR25
Fig 2. Frequency Response (Typical) of SR25
Specications are subject to change without notice.
Version 4, July 7, 2011
