Products Lineup

Data Library

Here, TOA’s Data Library equipped with a search engine offers its CAD drawings made out in pdf and dwg forms, EASE data, specification sheets, brochures, instruction and installation manuals, and a wealth of other product data for your downloading.


M-51F Microphone Input with Voice Gate


The M-51F is a microphone input module to be used in conjunction with the 900 series components and other TOA's equipment. It has a transformer balanced microphone input with female XLR type connector, phantom power supply function, voice-gate function, and gain and tone controls.

* 0 dB=1 V
Power Source 24 V DC (supplied from the main frame)
Current Consumption 27 mA
Input Sensitivity -60 dB* (rated output: -20 dB*), adjustable: -72 to -52 dB*
Input Impedance 600 Ω, balanced transformer-isolated
Distortion 0.05 % or less (1 kHz, output: 0 dB*)
Noise Level -86 dB* (20 Hz - 20 kHz BPF), input equivalent noise: -126 dB*
Gain 32 - 52 dB
Phantom Power +22 V DC (for condenser-type)
Tone Control 100 Hz: 0 to -10 dB
Signal Muting Level 40 dB (at 1 kHz)
Connector Female XLR connector (XLR-3-31 equivalent)
Dimensions 35 (W) × 78 (H) × 88 (D) mm (1.38 × 3.07" × 3.46")"
Weight Max. 110 g (0.24 lb)
  • Contact Us
  • A&E Specification Download
  • TOA UHF Wireless Microphone System
  • SounDoh WIKISound tips: text version
  • SounDoh VIDSound tips: video or animation version

Top of the Page