Earthworks Audio
Earthworks SR25
Small-diaphragm cardioid condenser (prepolarised), transformerless; for drum overheads, percussion and guitar amps
Approximate Some readings for this mic are uncertain; see the graphs.
Power Phantom 24-48 V.
- Type
- Condenser (electret)
- Pattern
- Cardioid
- Sensitivity
- −40 dBV/Pa
- Among 204 condensers: more output than 33%
- Among 311 mics: more output than 53%
- Self-noise
- 20 dB(A)
- Among 258 condensers: quieter than 23%
- Among 272 mics: quieter than 23%
- Max SPL
- 145 dB SPL
- Among 277 condensers: takes louder sound than 80%
- Among 343 mics: takes louder sound than 78%
- Rated range
- 20 – 25k Hz
vs 75 end-address condensers
More output than 20% of 75 end-address condensers.
Each stripe is one end-address condenser with a published sensitivity, and each bar counts them; further right means more output. This mic is in blue.
vs 104 end-address condensers
Quieter than 19% of 104 end-address condensers.
Each stripe is one end-address condenser with a published self-noise, and each bar counts them; further right means quieter. This mic is in blue.
vs 110 end-address condensers
Takes louder sound than 85% of 110 end-address condensers.
Each stripe is one end-address condenser with a published max SPL, and each bar counts them; further right means it takes louder sound. This mic is in blue.
Proximity effect: the bass it gains up close
From the manual (Recording Hacks copy), p. 2.
Fig. 2 "Frequency Response (Typical) of SR25" in the 2010 owner's manual; relative dB, 3 dB per division. Room and smoothing not stated. Dashed line, labelled "1m (3.3')".
Dashed: outside the rated range, or simulated (other angles and distances). Hover or tap the graphs for values.
Polar pattern
From the spec sheet, p. 2. Approximate
Polar graph on page 2 of the 2020 data sheet (the 2022 user guide: "Polar Response of SR25 (typical)"); full circle, rings every 6 dB (outer ring 0 dB, centre -36 dB). Measuring conditions not stated.
Approximate: reading error up to about 1 dB.
In practice
All specs
| From the spec sheet | ||
|---|---|---|
| Sensitivity | −40 dBV/Pa (10 mV/Pa)"10mV/Pa (-40dBV/Pa)"; the same in all four documents. | p. 2 |
| Self-noise | 20 dB(A)also 22 dB(A), 2010 manual. "20dB (A weighted)"; the product page "20dB SPL equivalent (A weighted)". The 2010 manual: "22dBA equivalent". | |
| Max SPL | 145 dB SPL"Max Acoustic Input 145dB SPL". | |
| Output impedance | 65 ohmbalanced, between pins 2 and 3; also 100 ohm, 2010 manual: balanced, 50 ohm each pin. "65Ω bal. (between pins 2 & 3 )"; the product page agrees. | |
| Rated load impedance | 600 ohmminimum, between pins 2 and 3 | |
| Powering | phantom 24-48 V"24-48V Phantom, 10mA". The 2010 manual: 48 V phantom. | |
| Current draw | 10 mA | |
| Connector | XLR-3 male (pin 2 hot)"XLR-3 (pin 2+)". | |
| Dimensions | 165 × 22 mmLength x diameter: "6.5 x .86 in. (165 x 22mm)". | |
| Off-axis response | Uniform frequency response at 0°, 45° and 90° off-axis | |
| From the product page | ||
| Rated frequency range | 20 Hz to 25 kHz±2 dB at 30 cm; also [20, 20000], ±2 dB at 30 cm, 2022 user guide; also [50, 25000], ±2 dB at 15 cm, 2010 manual. "20Hz -25kHz ±2dB at 12 inches (30cm)". The data sheet prints "20Hz to 25kHz +2dB @ 30cm". | p. 1 |
| Weight | 160 g".35 lb. (160g)"; the user guide and the 2010 manual agree. The data sheet misprints "0.35 lb. (1.60kg)". | |
| From the user guide | ||
| Supplied accessories | microphone clip; microphone bag; foam windscreen; tip protector"Your purchase includes": SR25, microphone clip, microphone bag, foam windscreen, tip protector. | p. 2 |
| Handling | The small tip that lets the mic capture the highest frequencies is delicate; a tip protector is included | p. 3 |
| From the manual (Recording Hacks copy) | ||
| ApplicationsEarthworks | Drum overheads and electric guitar amps (2020); in 2010 drums and percussion, the mic of the Earthworks DrumKit System, Leslie, guitar and bass, and kick drum with the KickPad | p. 2 |
| Patent | US Patent No. 6,091,829 | |
Documents
- SR25 Condenser Microphonedata sheet V1
- SR25 Cardioid Microphone for Guitaruser guide, May 2022
- SR25 — Condenser Guitar Microphone | Earthworks Audioproduct page
- SR25 Cardioid Microphone Owner's Manual2010
Copies kept by Mic Archive (manufacturers move and drop their documents), unchanged, with their original addresses. Each is © its publisher.