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From a linage of successful microphone designs by David Royer, the MA-100SP's cathode follower circuitry provides ample headroom for high SPL applications such as drums and guitar amplifiers. It also excels at the more common applications for small diaphragm, vacuum tube condenser microphones such as acoustic instruments, cymbals, stereo pairs and pianos.
Featuring hand selected, 3-micron cardioid and omni capsules, high quality Jensen audio transformers and military-grade JAN 5840 vacuum tubes, the MA-100SP performs at a level reminiscent of some of the best loved classic small-diaphragm tube condenser microphones. The MA-100SP's power supply can be set for either 110-120 VAC or 220-240 VAC via an external switch. The complete MA-100SP system is burned in for 24 hours, carefully tested and evaluated, then packaged in a protective carrying case.
Small Diaphragm - Big Sound!
Why choose a small diaphragm microphone? Because small diaphragm microphones offer some distinct advantages over their larger brethren:
Why choose an MA-100SP?
TRANSDUCER TYPE: Externally excited capacitor type
DIAPHRAGM: .8" / 20.5 mm diameter
DIAPHRAGM THICKNESS: 3 microns
POLAR RESPONSE: Interchangeable Cardioid and Omnidirectional Capsules
FREQUENCY RESPONSE: 20 Hz - 20 kHz, +/-3dB
SENSITIVITY: -37dB re 1V/pa
MAXIMUM SPL: 130dB
DISTORTION: head amp only , not to exceed .4% @ 140 dB SPL
SELF NOISE: Not to exceed 16dB
IMPEDANCE: 450 ohms, transformer balanced
VACUUM TUBE: 5840 pentode wired as triode, operated as a unity-gain buffer stage (cathode follower)
POWER REQUIREMENTS: 100-120VAC; 220-240VAC, 50 or 60 Hz. Power consumption approx. 10 watts.
DIMENSIONS AND WEIGHT: Carrying case with microphone, power supply, shock mount and cables: 7 lbs.
Carrying Case: 19" x 12.5" x 5.5"
Microphone: 5.5" x .75", weight 4.5 oz each