The Beachtek DXA-BMD is a two-channel, passive audio adapter for connecting professional audio gear from boom mics, wireless mic and mixing boards to the Blackmagic Cinema Camera.
The DXA-BMD uses exceptionally low noise, wide bandwidth, balancing transformers for pure, clean audio with no electronics to get in the way. This allows you to record high quality audio directly to the camera which will always be in sync with the video. Direct audio recording eliminates the need to have a separate audio recording device and syncing the audio in post editing.
The transformer balanced inputs provide electrical isolation for the camera and also to reduce the possibility of ground loop noise. Built-in VU meters makes it easy to verify the proper signal levels at a glance, while the level controls allow you to adjust the output signal for optimum recording. The built-in phantom power feature powers professional boom mics requiring 48 volts to operate.
The adapter mounts to the bottom of the camera and can also be mounted to any standard tripod.
DXA-BMD with Blackmagic Cinema Camera
Recording quality audio on the Blackmagic Cinema Camera can be a challenge. The non standard 1/4″ balanced inputs, no phantom power, finicky touch screen level controls and until recently, no VU meters have made it difficult to attach, control and monitor levels from normal audio gear to this camera.
Our DXA-BMD adapter was designed years ago to solve many of these issues by providing standard balanced XLR inputs, phantom power, real trim controls and VU meters. Since the adapter uses simple passive circuitry, the gain is unity which means that the output level is only as strong as the input level. The beauty of passive circuitry is that it provides pure clean audio to the camera without any electronics to get in the way.
However, the constant changes to the input sensitivity of the camera by each new firmware release is playing havoc with the recording levels. For some inexplicable reason known only to Blackmagic, they have added varying amounts of digital attenuation to the audio signals with each firmware upgrade. This often results in very low recording levels and excessive hiss. To eliminate this issue, the best solution is to use a preamplifier when using wired mics with this camera. Therefore, we now recommend that our passive DXA-BMD adapter be only used for amplified signals from mixing boards or wireless mics. These audio sources continue to work well with this adapter.
For those of you wishing to use a wired mic with the Blackmagic Cinema Camera it is recommended you use the BeachTek DXA-SLR ULTRA or BeachTek DXA-CONNECT.