Beachtek DXA-ALEXA Low-Noise Preamplifier for ARRI ALEXA Mini Camera

Beachtek DXA-ALEXA Preamplifier and DXA-CINE Adapter Kit

Beachtek DXA-ALEXA Preamplifier and DXA-CINE Adapter Kit

B&H # BEDXAALEXAK (B&H Kit)
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Product Highlights

  • For the ARRI ALEXA Mini Camera
  • DXA-ALEXA Low-Noise Preamplifier
  • DXA-CINE Hi-Def Audio Adapter
  • Includes Mounting Bracket
  • 3.5mm to 3.5mm SC35 Cable
  • Mounting Foot, Wheel, and Attachment Bolt
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Beachtek DXA-ALEXA overview

  • 1Description

The Beachtek DXA-ALEXA Preamplifier and DXA-CINE Adapter Kit from B&H includes the DXA-ALEXA and DXA-CINE adapters, a mounting bracket, 3.5mm to 3.5mm SC35 cable, a mounting foot with knurled wheel and attachment bolt, and an Allen key. The kit is designed for the ALEXA Mini camera, but is compatible with cameras like the RED DSMC2. Both preamps capture audio through their transformer-balanced inputs and avoid the need for external syncing. They offer up to 60 dB of gain and over 100 dB of dynamic range, as well as low-noise operation.

The DXA-ALEXA provides dual gain controls which are detented for precise settings, as well as high/low switches for microphone matching, switchable 48V phantom power for condenser mics, and easy-to-read LED level indicators, which give you a good picture of your overall sound. For outputs, the DXA-ALEXA gives you a balanced 5-pin XLR output that can connect directly to 5-pin LEMO inputs. You can also route signal to other recorders by means of an unbalanced 3.5mm jack. Connections are provided for headphones and loopback monitoring as well.

The Beachtek DXA-CINE is equipped with a plethora of inputs and outputs, including two mono 3.5mm inputs, one stereo 3.5mm input, one 5-pin balanced XLR output, and one unbalanced 3.5mm output. The inputs all provide plug-in power, and with multiple outputs on hand, you have options to feed either of the previously mentioned cameras. If your camera has a headphones output jack, you can loop it back into the device and monitor sound from that path to make doubly sure what you're hearing is what you're getting "on tape."

  • Beachtek DXA-ALEXA Low-Noise Preamplifier for ARRI ALEXA Mini Camera

    Designed primarily for the ALEXA Mini, but compatible with cameras such as the RED DSMC2, the Beachtek DXA-ALEXA is a low-noise preamplifier which connects directly to your camera, capturing audio through its transformer-balanced inputs and obviates the need for external syncing. The preamp itself sports a 100 dB dynamic range, and the construction of its inputs ensure galvanic isolation, as well as high common mode rejection in the face of common obstacles, such as electromagnetic interference.

    The DXA-ALEXA provides dual gain controls which are detented for precise settings, as well as high/low switches for microphone matching, switchable 48V phantom power for condenser mics, and easy-to-read LED level indicators which give you a good picture of your overall sound; green signifies a level between -40 and +16 dBu, yellow takes you all the way to +4, and red gives you an indication of overs.

    A carbon fiber chassis is relatively lightweight at under a pound, while weather-resistant top-panel switches ensure reliability in wide variety of conditions. For outputs, the DXA-ALEXA gives you a balanced 5-pin XLR output that can connect directly to 5-pin LEMO inputs. You can also route signal to other recorders by means of an unbalanced 3.5mm jack. Connections are provided for headphone and loopback monitoring as well. The preamp itself draws power from your existing rig by means of a 2-pin LEMO connection. Thanks to the preamp’s three threaded 1/4"-20 holes, you can mount this unit on the rails of third-party brackets, though a bracket has been included for mounting to camera cages, such as the ARRI ALEXA Mini camera cage. 

    Key Performance Features
    • Records audio directly to camera, obviating the need for syncing
    • 100 dB dynamic range, low-noise operation
    • Headphone monitoring and loopback monitor for external devices
    • Green, yellow, and red level indicators built-in for quick, overall level monitoring
    • 48V phantom power offered on both inputs
    • Transformer-balanced inputs provide galvanic isolation and high common mode rejection
    • Dual mono recording or stereo recording
    • Audio bracketing feature for backup
    • 5-pin XLR 4 dBu line-level output matched to line-level input of camera
    • High and Low switches for gain to match microphones
    • Auxiliary unbalanced microphone output for attaching an audio recorder (suitable for MP3 transcription or backup)
    Key Physical Features
    • Rugged chassis, easy operation
    • Locking Neutrik XLR connectors
    • Water-resistant top-panel switches
    • Detented level controls for precise adjustments and recall
    • Power switch provided on operator side, other controls situated on top and assistant side when situated in rear-rod mount position
    • Multiple mounting options, with mounting bracket included
  • Beachtek DXA-CINE Mini-Plug Audio Adapter for Cinema Cameras

    Designed for cinema cameras, the Beachtek DXA-CINE is an active adapter with built-in preamplifiers that allow you to record high-quality audio directly to camera, no syncing necessary. These preamps provide 60 dB of gain and over 100 dB of dynamic range, as well as low-noise operation. You can use this adapter with cameras such as the RED DSMC2 or ARRI ALEXA Mini, alongside most self-powered filmic microphones, as well as wireless mic receivers.

    A plethora of inputs and outputs are provided, including two mono 3.5mm inputs, one stereo 3.5mm input, one 5-pin balanced XLR output, and one unbalanced 3.5mm output. The DXA-CINE’s aforementioned inputs all provide plug-in power, and with multiple outputs on hand, you have options to feed either of the previously mentioned cameras. If your particular camera has a headphone output jack, you can loop it back into the device and monitor sound from that path to make doubly sure what you’re hearing is what you’re getting “on tape.”

    While a high/low gain switch lets you dictate a basic starting point for level, the DXA-CINE’s detented trim controls ensure that you always make precise and consistent adjustments; this comes in handy when you need to match audio between takes performed hours or days apart (or on either side of a completely different setup/location—reshoots come to mind). Built-in green/yellow/red indicators give you a quick overview of your levels at any time. Dual-mono and stereo recording are both possible, while bracketing audio is also a cinch. Thus, you can always record a lower-level track when using a mono microphone.

    Flexible mounting options abound, including a built-in thumbscrew with a 1/4"-20 mounting bolt and a separate, included brass mounting foot for hot-shoe mounting. Multiple accessories can be attached to the DXA-CINE via three 1/4”-20 threaded inserts as well. For power, a 2-pin LEMO jack is on hand, and configurations are possible for D-tap.

    Physical Features at a Glance
    • Two mono 3.5mm inputs with plug-in power
    • One stereo 3.5mm input with plug-in power
    • 5-pin balanced XLR output for connection to the ARRI ALEXA Mini
    • Auxiliary, unbalanced 3.5mm output for connection to the RED DSMC2
    • Detented level controls for precise adjustments
    • LEMO and D-tap powering options
    • Multiple mounting options
    • Three built-in 1/4"-20 threaded holes
    • Includes brass mounting foot
    • Includes 3.5mm to 3.5mm output cable
    Performance Features at a Glance
    • Records audio directly to the camera; no syncing required
    • 100 dB of dynamic range for low-noise operation
    • Headphone monitoring
    • Loopback monitoring for devices with headphone outputs (for instance, the RED DSMC2 module)
    • Easy-to-monitor green, yellow, and red level indicators
    • Capable of stereo and dual-mono recording
    • Audio bracketing feature for backup
    • Pre-calibrated +4 dBu line level output matched to camera’s line-level input
    • High (60 dB) and low (40 dB) switches for mic gain to match any microphone
In the Box
Table of Contents
  • 1Description
  • Beachtek DXA-ALEXA Low-Noise Preamplifier for ARRI ALEXA Mini Camera
    Connectors Phones: 3.5 mm stereo headphone connector
    RTN: 3.5 mm stereo input for loopback from camera
    Mic In Channel 1: XLR balanced mic-level input for channel 1
    Mic In Channel 2: XLR balanced mic-level input for channel 2
    Line Out: 5-pin balanced output at +4 dBu
    Mic Out: 3.5 mm unbalanced auxiliary stereo output
    2-pin LEMO 12 to 16 VDC power
    Frequency Response 20 Hz to 20 kHz (±1 dB)
    Gain Line Out:
    Low: 40 dB, High: 60 dB

    Mic Out:
    Low: 10 dB, High: 30 dB
    Maximum Input Level Low Gain: -15 dBu
    High Gain: -35 dBu
    Output Clipping Level Line Output: +25 dBu
    Mic Output: -5 dBu
    Dynamic Range 100 dB
    THD+N Low Gain: 0.012% (+4 dBu output, 1 kHz)
    High Gain: 0.06% (+4 dBu output, 1 kHz)
    Channel Separation Low Gain: 85 dB (+4 dBu output, 1 kHz)
    High Gain: 80 dB (+4 dBu output, 1 kHz)
    Metering Tri-Color LED:
    Green: -40 to 16 dBu
    Yellow: -16 to +4 dBu
    Red: Over +4 dBu
    Powering External DC input jack (12 to 16 V)
    Pin 1 = (-), Pin 2 = (+)
    Dimensions 5.0 x 3.8 x 1.6" / 126 x 96 x 40 mm
    Weight 0.8 lb / 374 g
    Packaging Info
    Box Dimensions (LxWxH) 9.9 x 7.8 x 3.9"
  • Beachtek DXA-CINE Mini-Plug Audio Adapter for Cinema Cameras
    Maximum Input Levels Low Gain: -15 dBu
    High Gain: -35 dBu
    Output Level +4 dBu when level indicators change to red
    Output Clipping Level XLR: +25 dBu
    3.5 mm: +21 dBu
    Frequency Response 20 Hz to 20 kHz (±0.5 dB)
    THD+N Low Gain: 0.013% (+4 dBu output, 1 kHz)
    High Gain: 0.08% (+4 dBu output, 1 kHz)
    Dynamic Range 100 dB
    Gain Low: +40 dB
    High: +60 dB
    Plug-in power 3.5 V on all mini-jack mic inputs
    Indicators Level
    Green: -40 to -16 dBu (low)
    Yellow: -16 to +4 dBu (normal)
    Red: +4 dBu (over)
    External Power 11 to 18 V via 2-pin LEMO; Pin 1 = (-), Pin 2 = (+)
    Dimensions (L x W x H) 3.5 x 3.0 x 1.6" / 9.0 x 7.6 x 4.0 cm
    Weight 10.2 oz / 0.3 kg
    Packaging Info
    Box Dimensions (LxWxH) 6.8 x 5.5 x 3.3"

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