A133
LARGE DIAPHRAGM CONDENSER MICROPHONE
WITH PAD AND ROLL OFF
OVERVIEW
The A133 is a large diaphragm condenser microphone ideal for vocals, choir,
piano, acoustic instruments and overheads. Featuring a contemporary,
compact design, the A133 is the perfect choice for podcasting, professional
audio production, studios and live stage performances.
Housed in a precision-machined aluminum body, the 33 mm fixed-charge
capsule features a gold-sputtered diaphragm for wide, natural frequency
response. With its well-behaved cardioid polar pattern, the A133 faithfully
captures the detail of the performance while rejecting room noises and other
unwanted, o-axis sounds.
A double woven steel mesh grille and ultra-thin acoustic foam oers
exceptional pop resistance for podcasting and vocals. Behind the grille, the
open-air design of the capsule mounting system allows the A133 to deliver
transparent, uncolored sound.
Proprietary impedance control between the capsule and circuitry ensures
consistent and reliable performance across a wide range of environments.
A unique and highly eective internal shock mount isolates the capsule from
mechanical vibrations and touch noise, eliminating the need for a bulky
external shock mount.
The switchable 10 dB pad and bass roll-o ensures you’re ready for any
recording or live performance situation.
Oering studio performance in a road-worthy package, the A133 also comes
with a protective zippered carrying case.
Requires 48-52 V phantom power. For best results, the A133 should be used
with a high-quality mic preamplifier and microphone cable.
MODEL VARIATIONS
A131 – Large diaphragm condenser microphone without pad and roll o
SUPPLIED ACCESSORIES
POUCHAXMED – Protective zippered carrying case
DCLIP – Heavy duty nylon molded snap on clip
OPTIONAL ACCESSORIES
APS2 – Two-channel 48 V phantom power supply with 110 V switchable to
240 V and detachable power cord
TRIPOD – Metal tripod desktop mic stand
STANDKD – Short pedestal stand with telescoping boom arm
DFLEX – Dual pivot rim mounted clip with extra wide butterfly jaws
CBL20 – 20’ premium XLR-XLR balanced mic cable. Quad conductor, twisted
pair with braided shield for conductivity. 6 mm PVC jacketed
CBL25 – 25’ premium right angle XLR balanced mic cable. Quad conductor,
twisted pair with braided shield for conductivity. 6 mm PVC jacketed
PD133 – Pop diuser to control plosives
FEATURES
• Large 33 mm condenser capsule
• Cardioid polar pattern
• Proprietary internal shock mount
• Low noise preamp circuitry
• Switchable 10 dB pad and bass roll o
• Designed, machined & tested in the USA
APPLICATIONS
• Vocals
• Choir
• Voiceover
• Podcasting
• Piano
• Acoustic instruments
• Drum overheads
A133 Spec Sheet v1.0
OPERATION AND MAINTENANCE
20 50 100 200 500 1K 2K 5K 10K 20K
The A133 is a low impedance microphone and should be plugged into a “mic
level” input on your console, mixer, or recording device. The A133 requires
phantom power and will NOT operate without phantom power voltage (48
Volts recommended) which is available on most professional mic preamps and
mixing devices. If phantom power is not available on your equipment, use a
phantom power supply such as the Audix APS2.
Avoid plugging or unplugging the microphone from a PA system unless the
channel is muted, or the volume of the system is turned down. Failure to do
so may result in a loud “popping” noise which could seriously damage the
speakers in the PA system or studio monitors.
The A133 is manufactured to exacting specs with road worthy construction.
However, the capsule is highly sensitive and should be handled with care.
Avoid extreme temperatures and be sure to store your microphone in the case
provided when not in use. Moisture of any kind can adversely aect the sound
and performance of your microphone.
USER TIPS
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 toward the
sound source.
When using at close range or on instruments with high SPL, apply the 10 dB
pad. If there is a need to reduce lower frequency vibrations, apply the low
frequency roll-o.
Further miking techniques may be found at www.audixusa.com.
SPECIFICATIONS & DIAGRAMS
Transducer / Capsule
Technology
Frequency Response 40 Hz - 20 kHz
Polar Pattern Cardioid
Output Impedance 150 ohms
Sensitivity 23 mV / Pa @ 1 kHz
Signal to Noise Ratio 84 dB
Maximum SPL 140 dB (150 dB with pad)
Dynamic Range 130 dB
Equivalent Noise Level 10 dBA
Operating Voltage 48 V (± 4 V) Phantom
Roll-o Filter @ 150 Hz
Connector 3-pin XLR m
Materials / Finish
Weight 280 g / 10 oz
dB
10
0
-10
-20
-30
33 mm fixed-charge
condenser / 29 mm
3.4 micron gold-sputtered
diaphragm
Body: Machined aluminum
Grille: Steel alloy
-3
-6
-9
-12
-15
-18
-21
-24
136 mm
0
dB
250
125
500
1 K
2 K
4 K
8 K
16 K
54.5 mm
© 2020 Audix Corporation. Audix is a registered trademark of the Audix corporation.
Specifications subject to change without notice.
For service and warranty information, visit AudixUSA.com/service
A133 Spec Sheet v1.0
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