The Boya BY-MP4 2-Channel Audio Adapter is a camera mountable 2-channel audio adapter that can combine two mono inputs into a stereo output. The adapter has a locking cold shoe mount as well as three additional mounting points on the side and the top of the unit so you can easily attach wireless receivers, microphones, lights and more.

Two Channel Adapter

Boasting the flexibility to adjust two channels independently using the integrated control dials, the BY MP4 adapter also offers a choice of either stereo or mono output, making it a super versatile audio solution.

Robust Aluminium Build

Constructed with a die-cast aluminium chassis, the audio adapter is super-tough and best of all doesn’t require batteries or any external power source to operate.

Includes TRRS and TRS Cables

The BOYA BY MP4 dual channel Audio Adapter comes with a TRS cable which allows you to connect the adapter to either a DSLR, mirrorless camera or camcorder or alternatively you can use the included TRRS cable to connect and record with your smartphone.


1 x 1/8" (3.5 mm) stereo mini-jack input


2 x 1/8" (3.5 mm) mono mini-jack inputs


1 x 1/8" (3.5 mm) stereo mini-jack output

Input Level:

MIC setting: -35 dBu minimum



Frequency response:

20 Hz to 20 kHz(+/-0.5 dB)


105x 60 x 40 mm (4.1x 2.4 x 1.6”)


203g ( 6.44oz. )

* Specifications subject to change by the manufacturer without notice
  • Boya BY-MP4 2-Channel Audio Adapter
  • 3.5mm to TRS Audio Cable
  • 3.5mm to TRRS Audio Cable


* Dispatch timeframes are indications only and may vary for multiple quantities. Timeframes are updated regularly during normal business hours.