Antenna Combiner


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  • Broadband UHF operation (440-865 MHz range)
  • Combines the signals of up to four wireless in-ear monitor transmitters into one antenna
  • Centralized power supply with ability to power four individual transmitters
  • Maintains clean signals with low distortion
  • Includes hardware for front-mounting the antenna for improved performance
  • Includes adapters to allow the unit to be mounted into a single rack space


The MCB4 has been discontinued. Please see the COMBINE4™ IEM Transmitter Combiner. Audio-Technica MCB4 Antenna Combiner allows the signals of up to four M3 Wireless In-Ear Monitor stereo transmitters to be combined onto a single transmitting antenna, reducing rack clutter. A wide-band unit that operates over the 440-865 MHz range, the MCB4 is designed to complement Audio-Technica M3 Wireless In-Ear Monitor Systems. It is also suitable for many other in-ear wireless systems (with external BNC antenna connections) operating within the 440 to 865 MHz range. The MCB4 provides one output and four isolated transmitter inputs. All RF connectors are BNC-type. Four jacks on the rear panel (controlled by the unit's power switch) provide 12V DC (center positive) to power as many as four transmitters operating on 12 volts at up to 600 mA each. Included with the unit are four DC cables appropriate for use with M3T (or like-powered) transmitters. The 12-volt supplies for powering transmitters are short-circuit protected. The unit features all-metal construction for extreme durability and protection from radio frequency interference.


Antenna & Distribution
Connections BNC Female (5 total)
Power Supply Desktop switching power supply rated at 5A @ 12V DC or 60 Watts. Input Voltage 100-240V AC via detachable IEC 320/ C14 cable. Output is provided on an over- molded 3-pin Molex-style termination
Dimensions 210.0 mm (8.27") W x 46 mm (1.80") H x 176.0 mm (6.93") D (one rack space)
Weight 1.0 kg (2.2 lbs.)
Accessories IEC 320/C14 power cable (for power supply); 5 – 22" RF (BNC to BNC) cables;
4-DC power cables; Rack kit for front- mounting antennas and adaptation to a 19" rack
Bandwidth 440 – 865 MHz



MCB4 Declaration of Conformity
MBC4 Owners Manual