R22 158.34
(R25 482.09 incl VAT)
Short description:

MTH400 is a handheld transmitter especially designed for professional wireless microphone applications.


MTH400 is a handheld transmitter especially designed for professional wireless microphone applications. It is very easy and quick to use thanks to OLED display and 1 joggle selector and 2 buttons for straight setup of gain and channel.

MTH400 benefits also of the latest Wisycom RF technology, it has been especially designed for robustness against noise and self-interference thanks to a special “intermodulation cancellation” circuit (available also with the RF circulator option).


Switchable channels

2400 allocated by 40 groups of 60 channels (in specific frequency range), quickly selectable with dedicated buttons

Switching window

Up to 232 MHz, depending on band (see Variants below)


Quartz PLL  frequency synthesizer circuit (25 kHz step)

Frequency stability

± 2,5 ppm (in the rated temperature range)

Temperature range

-10 ÷ +55 °C


Max RF power

  • 10mW (ERP) (to respect some local norm)

  • 50 mW (ERP) (note: in some countries middle power can be disabled, for local norm!)

  • 100 mW (ERP) (note: in some countries high power can be disabled, for local norm!)

Spurious emissions

< 2 nW


wideband FM, with pre-emphasis

Nominal deviation

±40 kHz  (Peak deviation =  ±56 kHz)


Telemetry feature

MTH300 transmits also a digitally modulated sub-carrier, suitable for:

  • tone-squelch operating
  • remote battery monitoring
  • optional PTT (push to talk) operation

AF input connection

Directly interchangeable microphone-heads

AF input level

60 dBu adjustable range from -54 to +6 dBu at peak deviation (1 kHz), adjustable in 1 dB step

Max. input level

+6 dBu

Max sound pressure

150 dB SPL (0,5% THD), with MCM301/MCM302/MCM303/MCM304/MCM305 condenser-




ENR (Wisycom Extended-NR), with independent Attack- and Recovery-time, noise optimized

ENC (Wisycom Extended-NC), with independent Attack- and Recovery-time, voice optimized & with reduced pre-emphasys

AF bandwidth

45 Hz ÷ 21 KHz (3dB)

55 Hz ÷ 20 KHz (1dB)


< 0.3 %   (0.15 % typ.)

Signal-to-noise ratio

typ. 115 dB (A)rms with 40kHz deviation typ. 121 dB (A)rms  with 56kHz deviation



Led indication with bicolor led (red & green) on wireless power switch:

  • Wireless transmission status:
    • GREEN on/off
  • Battery lifetime status: GREEN
    • steady (> 25%)
    • slowly blinking (< 25%)
    • quickly blinking (<12%)
  • Modulation peek (if activated): RED ▪ Ptt status: RED if active



High contrast OLED (Organic light-emitting diode) white display (128 x 32 pixels)

8 step battery lifetime indication: 7 bars (100%-87%-75%-63-50%-38%-25%) and “empty bar” quickly blinking (12% remaining)

Power supply

2 AA size cell (Alkaline, rechargeable NiMH or Lithium)

Battery life (alkaline)

approx. 10 hours @ 50mW continuous working; up to 14 hours @ 10mW


Þ body max. diameter  33 mm  (without microphone-head)

Þ  total length 183 mm  (without microphone-head)


Approx. 300g, including battery and MCM3xx (condenser) mic-head ( approx. 260g batteries excluded)

Datasheet (MTH400_Wideband_handheld_TX.pdf, 777 Kb) [Download]

Manual (WisyCom_MTH400_UM_2013-05-16.pdf, 1,638 Kb) [Download]

Factory Lead time : 3 weeks

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