SCALE IS 5 DECIBELS PER DIVISION
Polar Pattern
200 Hz
LEGEND
5 kHz
1 kHz
8 kHz
240
180
210
270
300
330
0
150
120
90
30
60
12" or more on axis
100
50 200
LEGEND
10k
5k
1k
500 2k 20k
Frequency in Hertz
Frequency Response
Response in dB
10 dB
• Ideal for kick drum, percussion, brass, and other highly dynamic
instruments
• Excels in high-SPL applications
• Warm low-frequency response with excellent presence
• Superior off-axis rejection for maximum gain before feedback
• Versatile mounting options and effective dampening of
mechanical noise thanks to included AT8471 isolation clamp
• Corrosion-resistant contacts from gold-plated XLRM-type
connector
• Rugged design and construction for reliable performance
• 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.
PRO 25ax SPECIFICATIONS†
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/cm2= 10 microbars = 94 dB SPL
Specifications are subject to change without notice.
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
PRO 25ax HYPERCARDIOID DYNAMIC
INSTRUMENT MICROPHONE
