Audix SCX25-A Condenser Piano Microphone

Audix SCX25-A Condenser Piano Microphone

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Audix SCX25-A Condenser Piano Microphone

Weight 4.00 lbs

This for 1-New Audix SCX25A condenser microphone for piano.  The Audix SCX25A is a professional studio condenser microphone with an elegant design and a patented capsule suspension system. Uniquely shockmounted within an intricate machined brass ring, the SCX25A capsule is completely isolated from the mic body and electronics. By successfully minimizing acoustic reflections and diffractions, the SCX25A delivers a pure, open-air sound with exceptional detail and realism.

With a smooth uniform frequency response from 20 Hz - 20 kHz, the SCX25A is very consistent when responding to on and off-axis signals, exhibiting excellent phase coherence and minimal proximity effect. The SCX25A is characterized with a wide cardioid polar pattern which enables the sound engineer the opportunity to blend the sound of the instrument or vocal with the sound of the room. Other features include a one-inch (25 mm) gold vapor capsule, miniaturized electronics, and an extremely small footprint. The SCX25A will handle sound pressure levels in excess of 135 dB and will provide up to 20 dB of ambient noise rejection.

In addition to vocals, the SCX25A is ideally suited to capture acoustic instruments such as piano, guitar, vibes, woodwinds, brass, percussion toys, drum overheads, orchestra and symphony sectionals.

The SCX25A, which is manufactured to exacting standards and tight tolerances, features a precision machined brass body, innovative capsule suspension system, steel mesh grill, black e-coat finish, laser etched model and serial number, Switchcraft® XLR connector, and heavy duty nylon clip.



1-  Audix SCX25A microphone1-  Foam lined wooden carrying case (CC5)

1-  High quality nylon mic clip 180º with a standard 5/8 inch -27 thread (Note: metal adapter also supplied to accommodate European standard threads) (MC1)

1-  Cordura carrying pouch (P1) 



  • Innovative design

  • Isolated capsule suspension system

  • Low noise electronics

  • Extremely small footprint

  • brass body only 4 inches long





Transducer Type



Frequency Response

20 Hz - 20 kHz


Polar Pattern



Output Impedance

200 ohms


Sensitivity at 1k

28 mV / Pa


Equivalent Noise Level

14 dB (A weighted)


Signal to Noise Ratio

80 dB


Maximum SPL

≥135 dB


Dynamic Range

121 dB


Power Requirements

48-52 volts phantom



Switchcraft® male XLR connector



Positive pressure on diaphragm produces positive voltage on pin 2 relative to

pin 3 of output XLR connector


Housing / Finish

Machined Brass /

Multi-layer Class ‘A’ liquid



244 g / 8.6 ounces



148 mm / 5.8 inches





Studio vocals, lead and backing

Voice over


Ambient room mic

Drum overheads


Acoustic instruments

piano, sax, strings, guitar, flute

Bells, chimes, marimba, vibes



OPERATION AND MAINTENANCE:  Condenser microphones as a general rule are much more sensitive and reactive than dynamic microphones and should be handled with care. Avoid extreme temperatures wherever possible. Moisture and high humidity can adversely effect the performance of the microphone and cause permanent damage. When not in use, please store your mic in the pouch or case provided at room temperature.


Live Sound & Recording: The SCX-25 can be used successfully to record any acoustic instrument, which, of course, includes the human voice. It is an outstanding choice for symphonic recordings, bluegrass instruments, orchestral instruments, zone miking, and room miking. We are constantly receiving new miking ideas and applications from live sound and recording engineers.  Please consult the Audix web site for updates or call us if you have questions regarding specific instruments or applications.  The correct side: Note that the front of the microphone element is on the same side as the printing.  This side of the microphone should be facing towards the sound source.


Vocals:  The SCX-25 is a stunning vocal microphone with an extreme accuracy and detail. Since the SCX-25 is not prone to proximity effect, the vocalist can be positioned just about anywhere within a 2 foot range. The microphone can be in just about any position as long as the element is directly facing the artist's voice. A pop-screen of some type should be employed. 


Piano:  The SCX-25 is the ideal piano microphone and is being used successfully for both studio and live applications.  A conventional stereo pair set up is the most popular method. Typically one mic placed mid-way over the upper register towards the keyboard, and one mic placed mid-way over the lower register towards the rear of the strings. The SCX-25 can be placed very close to the strings (and hammers ) for a more percussive sound. For classical piano, the pair of microphones is usually placed outside the piano facing the lid at a distance of anywhere between 4-8 feet from the strings.


Closed lid:  For live sound and live recording, the biggest problem is that piano mics are prone to picking up sound from the rest of the instruments on stage. For this reason, most live sound engineers like to get the lid either closed or somewhat closed. This usually results in a “boxy” or harsh sound.  The SCX-25 can provide a beautiful and realistic sound even with the lid completely closed. By using the optional D-flex mic clip, inside miking is made easy. These clips will attach to the dividing bars of the piano and can be placed in a wide variety of positions. This method allows for the piano lid to be completely closed if necessary.


Acoustic guitar:   One microphone—The SCX-25 provides a huge soundfield, so you will want to experiment in order to find the “sweet spot” of the guitar. The trick is to find the perfect blend between the bass overtones which eminate from the body, the picking of the strings, and the clarity of the fretboard.  A good starting point is 12 inches out, 4-6 inches above the soundhole, the mic placed between the soundhole and the end of the fretboard.  Stereo miking—One mic near the fretboard and the other 18 inches above the body of the guitar.


WARNING: The SCX-25 requires 48-52 Volts of phantom power to polarized the back plate and to fully charge the element.  For this reason, DO NOT PLUG OR UNPLUG THE MICROPHONE INTO OR OUT OF THE PA SYSTEM UNLESS THE VOLUME OF THE SYSTEM IS TURNED DOWN. Failure to do so may result in a loud “popping” noise sensation which could seriously damage the speakers in the PA system.  Power requirements are 48-52 Volts Phantom Power. Most current mixing boards are equipped with phantom power, however, if phantom power is not available please use the Audix APS-2 power supply to interface between the microphone and the mixing board.


OUTPUT:  The SCX-25 output is balanced across Pin 2 (positive) with respect to Pin 3. The shield is connected to Pin 1.  It is recommended to use a high quality microphone cable with 3 pin XLR connectors.


SERVICE AND WARRANTY:  This microphone is warranted for a period of 1 year from anyand all manufacturing defects.  Should your microphone failin any way, please contact the Audix Service department at 503-682-6933.  A Return Authorization number is required before sending back any products.





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