The Audix A133 Large Diaphragm Condenser Microphone delivers detailed, natural sound reproduction for studio recording, podcasting, voiceovers, and live sound applications. Featuring a precision-engineered 33mm condenser capsule, cardioid polar pattern, and low-noise electronics, the A133 is designed to capture vocals and instruments with clarity while minimizing unwanted background sound.
Built for professional audio environments, the A133 combines studio-quality performance with a compact, roadworthy design. Its precision-machined aluminum housing, internal shock-mount system, and protective steel mesh grille make it suitable for recording studios, production facilities, houses of worship, and live performance venues.
Unlike condenser microphones that require a bulky external shock mount, the Audix A133 incorporates a proprietary internal shock-mount system that isolates the capsule from mechanical vibration and handling noise. A switchable 10dB attenuation pad and bass roll-off filter provide additional flexibility when recording loud instruments or controlling unwanted low-frequency noise.
Whether capturing a solo vocalist, recording an acoustic guitar, miking a piano, or positioning microphones above a drum kit, the A133 provides a versatile solution for professional sound reproduction.
Features and Benefits
33mm Large Diaphragm Condenser Capsule
The Audix A133 features a 33mm fixed-charge condenser capsule with a 29mm gold-sputtered diaphragm.
This large diaphragm design delivers a natural, detailed frequency response from 40Hz to 20kHz, making it well suited for vocals, acoustic instruments, piano, and overhead recording.
Its open-air capsule mounting system helps preserve the natural character of the sound source without introducing unnecessary coloration.
Cardioid Polar Pattern for Focused Sound Pickup
The A133 uses a cardioid pickup pattern that emphasizes sound arriving from the front of the microphone while reducing sound pickup from the rear.
This directional response helps control room reflections, background noise, and unwanted sound from nearby instruments.
The cardioid design is particularly useful for vocal recording, podcasting, live performances, and multi-microphone setups where sound isolation is important.
Proprietary Internal Shock-Mount System
An integrated shock-mount system isolates the microphone capsule from mechanical vibration and touch noise.
By incorporating this protection inside the microphone body, the A133 reduces the need for a separate external suspension mount while maintaining a compact profile.
This makes the microphone easier to position in crowded recording setups, on stage, or around instruments.
Switchable 10dB Attenuation Pad
The A133 includes a selectable 10dB pad that increases its maximum sound pressure handling capability from 140dB SPL to 150dB SPL.
This feature is useful when recording high-volume sources such as drums, brass instruments, guitar amplifiers, and other loud acoustic sources.
Switchable Bass Roll-Off Filter
A built-in bass roll-off switch helps reduce unwanted low-frequency energy caused by vibration, rumble, and proximity effect.
This provides additional control when recording speech, vocals, or instruments without relying entirely on external signal processing.
Low-Noise Electronics for Detailed Recordings
The microphone incorporates low-noise preamplifier circuitry with an equivalent noise level of just 10dBA.
Its 84dB signal-to-noise ratio helps capture quiet musical passages, detailed acoustic performances, and spoken-word content with minimal microphone self-noise.
Double-Layer Steel Mesh Grille
The A133 features a double-woven steel mesh grille with ultra-thin acoustic foam.
This construction provides resistance to vocal plosives and air movement while protecting the sensitive condenser capsule.
For close vocal recording, an additional pop filter may still be beneficial.
Durable Machined Aluminum Construction
The precision-machined aluminum microphone body offers durability without excessive weight.
Designed, machined, and tested in the USA, the A133 combines professional recording performance with construction suitable for regular studio and live sound use.
Professional XLR Connectivity and Phantom Power
The Audix A133 uses a standard 3-pin male XLR output and requires 48V phantom power, with an operating range of approximately 44V to 52V.
It connects to compatible professional audio interfaces, mixing consoles, and microphone preamplifiers that provide phantom power.
Audix A133 Key Features
- Professional large diaphragm condenser microphone
- 33mm fixed-charge condenser capsule
- 29mm gold-sputtered diaphragm
- Cardioid polar pattern for directional sound pickup
- Wide 40Hz–20kHz frequency response
- Proprietary internal shock mount reduces vibration noise
- Switchable 10dB attenuation pad
- Switchable bass roll-off filter
- Maximum SPL of 140dB, or 150dB with pad engaged
- Low 10dBA equivalent noise level
- 84dB signal-to-noise ratio
- Double-woven steel mesh grille with acoustic foam
- Precision-machined aluminum body
- Standard 3-pin XLR output
- Requires 48V phantom power
- Includes protective zippered carrying case
- Designed, machined, and tested in the USA
Audix A133 Audio Specifications
| Specification | Details |
|---|
| Microphone Type | Large Diaphragm Condenser |
| Capsule | 33mm Fixed-Charge Condenser |
| Diaphragm | 29mm Gold-Sputtered, 3.4 Micron |
| Polar Pattern | Cardioid |
| Frequency Response | 40Hz–20kHz |
| Sensitivity | 23mV/Pa at 1kHz |
| Output Impedance | 150Ω |
| Maximum SPL | 140dB / 150dB with Pad |
| Signal-to-Noise Ratio | 84dB |
| Equivalent Noise Level | 10dBA |
| Dynamic Range | 130dB |
Audix A133 Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Audix |
| Model | A133 |
| Attenuation Pad | Switchable -10dB |
| Low-Frequency Filter | Switchable Bass Roll-Off |
| Shock Mount | Internal |
| Power Requirements | 48V ±4V Phantom Power |
| Connector | 3-Pin Male XLR |
| Body Material | Machined Aluminum |
| Grille Material | Steel Alloy |
| Weight | 280g / 10 oz |
| Included Accessory | Zippered Carrying Case |
Recommended Applications
Studio Vocal Recording: Captures lead vocals and backing vocals with detailed, natural sound reproduction.
Podcasting and Voiceovers: Provides focused cardioid pickup, low self-noise, and resistance to plosives for professional spoken-word recording.
Choir Recording: Suitable for capturing vocal ensembles when positioned appropriately for balanced coverage.
Piano Recording: Reproduces the detail and dynamic character of acoustic piano performances.
Acoustic Guitar and Instruments: Captures the tonal character and articulation of guitars, strings, and other acoustic instruments.
Drum Overheads: Handles high sound pressure levels while capturing cymbals and the overall drum kit.
Live Stage Performances: Offers durable construction, directional pickup, and flexible sound pressure handling for professional live sound reinforcement.
Houses of Worship: Suitable for choir, instrumental, and performance microphone applications.
Need a Compatible Microphone Cable or Audio Interface?
The Audix A133 requires a professional microphone input with 48V phantom power.
For proper operation, use a quality balanced XLR microphone cable connected to a compatible mixer, recording interface, or microphone preamplifier.
A microphone stand or boom stand can help position the A133 for vocals, piano, acoustic instruments, and drum overheads.
Why Buy the Audix A133 from Audio Supply?
Audio Supply offers professional Audix microphones and recording accessories for studios, houses of worship, and live sound systems. The Audix A133 is a versatile choice for users seeking detailed condenser microphone performance, flexible controls, and durable construction for recording and live applications.
