PRO 25ax
HYPERCARDIOID DYNAMIC
INSTRUMENT MICROPHONE
PRO 25ax SPECIFICATIONS†
• Ideal for kick drum, percussion, brass, and other highly dynamic
instruments
ELEMENT
Dynamic
POLAR PATTERN
Hypercardioid
FREQUENCY RESPONSE
30-12,000 Hz
OPEN CIRCUIT SENSITIVITY
– 54 dB (1.9 mV) re 1V at 1 Pa*
IMPEDANCE
600 ohms
WEIGHT (less accessories)
8.1 oz (230 g)
DIMENSIONS
4.45" (113.0 mm) long,
1.97" (50.0 mm) maximum diameter
OUTPUT CONNECTOR
Integral 3-pin XLRM-type
ACCESSORIES FURNISHED
AT8471 isolation clamp for 5/8"-27
threaded stands; 5/8"-27 to 3/8"-16
threaded adapter; soft protective pouch
†In the interest of standards development, A.T.U.S. offers full details on its test
methods to other industry professionals on request.
*1 Pascal = 10 dynes /cm 2 = 10 microbars = 94 dB SPL
Specifications are subject to change without notice.
• Excels in high-SPL applications
• Warm low-frequency response with excellent presence
Polar Pattern
Frequency Response
0
330
30
300
• Versatile mounting options and effective dampening of
mechanical noise thanks to included AT8471 isolation clamp
• Corrosion-resistant contacts from gold-plated XLRM-type
connector
60
10 dB
90
270
240
120
50
210
150
100
500
200
1k
2k
5k
10k
20k
Frequency in Hertz
180
• Rugged design and construction for reliable performance
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
12" or more on axis
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
• Hypercardioid polar pattern improves isolation of desired sound
source
Output from the microphone’s XLRM-type connector is low
impedance (Lo-Z) balanced. The signal appears across Pins 2 and
3; Pin 1 is ground (shield). Output phase is “Pin 2 hot”– positive
acoustic pressure produces positive voltage at Pin 2.
To avoid phase cancellation and poor sound, all mic cables must be
wired consistently: Pin 1-to-Pin 1, etc.
The PRO 25ax includes an AT8471 isolation clamp to provide
secure mounting, versatile positioning, and effective dampening of
unwanted mechanical noise.
Take care to keep foreign particles from entering the windscreen.
An accumulation of iron or steel filings on the diaphragm, and/or
foreign material in the windscreen’s mesh surface, can degrade
performance.
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P51676-EN
©2004 Audio-Technica U.S., Inc.
Printed in Japan
Response in dB
• Superior off-axis rejection for maximum gain before feedback