Audix TM1 Test & Measurement Microphone
Overview
The Audix TM1 is a 6 mm pre-polarized condenser microphone designed for test and measurement applications. It is recognized for its linearity, accurate response, consistency, ease of use, and affordability.
Characterized by a uniformly controlled omni-directional polar pattern, the TM1 is engineered to capture acoustic measurements for room analysis software, real-time analyzers, and other sound control devices. Its flat frequency range of 20 Hz - 25 kHz makes the TM1 an excellent tool for sound engineers, sound companies, and recording enthusiasts.
Requiring 18-52 Volts phantom power for operation, the TM1 features a precision-machined 4-stage brass body and capsule housing with a nickel plate finish. It includes a Switchcraft® or Audix XLR connector, shock-absorbent O-rings, and a heavy-duty snap-to-fit mic clip.
Image: The Audix TM1 microphone, a slender, silver-colored condenser microphone with a black grille.
Supplied Accessories
- DCLIP - Heavy duty tension fit mic clip
- P1 - Carrying pouch
Images: DCLIP (black microphone clip), P1 (black carrying pouch).
Optional Accessories
- CBL20 - 20' XLR-XLR quad conductor mic cable
- SMT19 - Shock mount clip
- SMT25 - Shock mount system
- TM1CA4231 - Calibration adapter
- TRIPOD - Tripod mic stand
- WSTM1 - Threaded windscreen
Images: CBL20 (coiled black XLR cable), SMT19 (black shock mount clip), SMT25 (black suspension shock mount), TM1CA4231 (small black calibration adapter), TRIPOD (black tripod microphone stand), WSTM1 (black threaded windscreen).
Features
- 6mm pre-polarized condenser capsule
- High SPL response
- Precision machined brass housings
- Low noise electronics
- Replaceable electronics and capsule
- 3 year warranty
Applications
- Test and measurement
- Real time analyzers
- Room analysis software programs
- Ambient room miking
Specifications
| Transducer Type | Pre-polarized Condenser |
|---|---|
| Frequency Response | 20 Hz - 25 kHz +/-2 dB |
| Polar Pattern | Omni |
| Output Impedance | 200 ohms |
| Sensitivity | 6 mV/Pa @ 1k |
| Maximum SPL | 130 dB with distortion <1% |
| Signal to Noise Ratio | 140 dB Max |
| Equivalent Noise Level | 66 dB |
| Dynamic Range | 28 dB (A weighted) |
| Connector | male XLR |
| Power Requirements | 18-52 V phantom |
| Polarity | Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output XLR connector |
| Materials / Finish | 4 piece precision machined brass / Nickel Finish |
| Weight | 132 g / 4.7 oz |
| Length | 150 mm / 5.9 in |
Dimensions
The microphone has a length of 150 mm (5.9 in). Its body is approximately 19 mm in diameter at the base and tapers to 7.7 mm at the top.
Diagram: Line drawing illustrating the microphone's dimensions, showing length and diameter measurements.
Frequency Response
The frequency response graph shows a flat response curve from 20 Hz to 25 kHz, with deviations of only +/- 2 dB. This indicates accurate sound reproduction across the specified frequency range.
Graph: A line graph depicting the microphone's frequency response, demonstrating a flat curve from 20 Hz to 25 kHz.
Polar Patterns
The polar pattern plots for low ('Lo') and high ('Hi') frequencies illustrate the microphone's omni-directional characteristic. Sound is captured with consistent sensitivity from all directions, as shown by the circular plots.
Graphs: Two polar plots showing omni-directional pickup patterns for low and high frequencies.
Architect and Engineer Specifications
The microphone shall be a back plate pre-polarized condenser with an omni-directional polar pattern. It shall operate on 18-52 Volts phantom power and have a nominal output impedance of 200 ohms at 1 kHz. The microphone shall have a sensitivity of 6 mV ± 3 dB / Pa at 1 kHz and a maximum SPL level of 130 dB with a THD of 1%. The microphone shall be machined from brass with dimensions of 19 mm diameter at the base, 7.7 mm diameter at the top, and 150 mm in length. The microphone shall be the Audix TM1.
Operation and Maintenance
The TM1 is a low impedance microphone and should be connected to a "mic level" input on your console, mixer, or recording device. It requires 18 Volts minimum phantom power, which is available on most professional mic preamps and mixing devices. If phantom power is not available, a separate phantom power supply (e.g., Audix APS2) must be used.
To avoid loud "popping" noises that could damage speakers, avoid plugging or unplugging the microphone into a PA system unless the channel is muted or the system volume is turned down.
User Tips
Measurement: The TM1 is an excellent choice for room analysis programs and real-time analyzers. Ensure connection to a low impedance input and availability of phantom power.
Ambient Room Application: The TM1 can capture "room sound" for in-ear monitors. Typically, one microphone is placed on each side of a stage, facing the audience.
Recording: The TM1 offers an extremely flat and accurate sound. Its compact profile makes it suitable for use with portable recording devices for live stereo miking. It is also effective for miking acoustic instruments and capturing room ambience.
Further miking techniques may be found at www.audixusa.com.
Product Registration and Warranty
Product Registration: Please register your product online at www.audixusa.com/docs_12/about/product_registration.shtml.
Service and Warranty: This microphone is covered by a 3-year warranty against defects in material and workmanship. Audix will repair or replace defective products at no charge with proof of purchase. Shipping costs for warranty repairs or returns are not covered by Audix. The warranty excludes damage from normal wear, abuse, environmental factors, shipping, or failure to use or maintain the product per instructions. Implied warranties of merchantability and fitness for a particular purpose are excluded. Audix's liability is limited to the actual price paid for the product and does not include incidental or consequential damages.
For service, contact the Audix Service department at 503.682.6933. A Return Authorization is required before returning any product.
