These supercardioid boundary mics are designed for use on the theater stage to pick up actors in drama or musicals. Other intended uses are capturing the footwork of dance groups, and picking up speech in boardrooms, conferences, pulpits, and altar tables.
Miniature capsule technology prevents phase cancellations due to sound reflections off the stage floor or table top. This results in a wide, smooth frequency response free of comb filtering, so speech sounds clear and natural.
With its thick steel housing and rugged construction, the TM-125 can withstand heavy footsteps that would destroy other microphones. All electronics are inside the housing. In the TM-125, a supplied A3M mic cable plugs into a connector in the side of the microphone. In the TM-125C, a 6-foot, permanently attached cable with A3M connector exits the side of the microphone.
The supercardioid polar pattern of the TM-125 helps gain-before-feedback, and provides excellent isolation from sounds behind the mic, such as a pit orchestra.
Features and Benefits
- Wide, smooth frequency response provides natural speech reproduction
- High-frequency rise keeps speech clear, even when actors face to the side
- Tight pickup pattern reduces feedback
- Extreme rear rejection isolates the mic from the pit orchestra
- Picks up sound but rejects mechanical vibrations
- High sensitivity and low-impedance balanced output provide a strong, hum-free signal
- Low-profile, rugged housing is inconspicuous and withstands heavy footsteps
- Asymmetrical mic-capsule placement reduces pickup of standing waves for a smoother frequency response
- No pin-1 problem: Cable shield is tied directly to the mic chassis, preventing hum and RFI
- One-piece compact circuit board assembly reduces noise interference
- Low-noise components
- Each unit is tuned and voiced to match others within +/- 1.5 dB
- Model TM-125C has permanently attached cable to prevent connector breakage
- 100% tested by the design engineers
- Tech support by the design engineers
- Made in Elkhart, Indiana, USA
Specifications
Type: Supercardioid condenser boundary microphone.
Transducer: Electret condenser.
Frequency response: 80 Hz to 18 kHz with sound source 30° above the boundary plane.

Polar pattern: Supercardioid in the horizontal plane; half-supercardioid in the vertical plane.

Impedance: 85 ohms. Recommended load impedance 1000 ohms or greater.
Sensitivity: 22 mV/Pa (-33 dBV/Pa). 1 Pa = 94 dB SPL.
Equivalent noise level (self noise): 22 dBA (0 dB = .0002 dyne/cm2).
Signal-to-noise ratio: 72 dB at 94 dB SPL.
Maximum SPL: 120 dB SPL produces 3% THD. The mic will not audibly distort in normal use.
Cable (TM-125): 15-foot black 2-conductor shielded cable with tiny XLR connector and XLR connector.
Cable (TM-125C): Permanently attached, 6-foot, black 2-conductor shielded cable with XLR connector.
Operating voltage: 12–48V phantom power.
Current draw: 4 mA.
Materials: Steel housing.
Finish: Black.
Net weight (TM-125, mic only): 8.3 oz (0.24 kg).
Net weight (TM-125C, mic and cable): 10.9 oz (0.31 kg).
Dimensions: 5.1” long x 3” wide x 0.92” high (13 cm long x 7.6 cm wide x 2.3 cm high).
Output connector (TM-125): TB3M (tiny XLR) in mic, XLR-type 3-pin male at end of cable.
(TM-125C): XLR-type 3-pin male at end of permanently attached cable.
Specifications subject to change without notice.