BeachTek DXA-ALEXA Low-Noise Preamplifier for ARRI ALEXA Mini
- Two XLR inputs with phantom power for the ARRI ALEXA Mini
- Balanced 5-pin XLR output
- Carbon fiber chassis under 1 lb
$700.00 USD
BeachTek DXA-ALEXA Low-Noise Preamplifier for ARRI ALEXA Mini
Made for the ARRI ALEXA Mini, the BeachTek DXA-ALEXA is a two-channel low-noise preamplifier whose balanced 5-pin XLR output connects to the camera’s 5-pin audio input.
Its two XLR inputs are transformer balanced for galvanic isolation and high common mode rejection and have phantom power and dual gain controls. It also has a stereo mini-jack input. Tri-color LEDs show the recording level, and a headphone output monitors the audio.
An unbalanced stereo mini-jack carries an auxiliary mic-level output to other cameras and recording gear. With a single mono mic, audio bracketing records a backup channel at a lower level, a safety track in case the main channel distorts from a hot input.
The carbon fiber chassis matches the look of the camera, weighs under 1 lb, and has weather-resistant switches on its top panel. Power comes from the rig through a 2-pin LEMO jack at 12 to 16 V, and the BeachTek BT-PWR cable connects that jack to a D-Tap.
The included bracket, with captive thumb screws, mounts the preamp to the ALEXA Mini’s cage under the handle or on a side bracket. Three threaded 1/4-20 holes in the preamp’s base also fit a rail bracket.
The BeachTek BT-LEMO cable connects the DXA-ALEXA to the ALEXA Mini, the BT-LF to the ALEXA Mini LF, and the BT-MINI to RED DSMC2 cameras.
Features
- Two transformer-balanced XLR inputs with phantom power
- Stereo mini-jack input
- Dual gain controls
- Tri-color LED level indicators
- Headphone monitoring
- Balanced 5-pin XLR output and auxiliary mic-level mini-jack output
- Audio bracketing for a backup channel
- Carbon fiber chassis with weather-resistant switches
- 2-pin LEMO power jack
- Mounting bracket included
What's Included
- DXA-ALEXA preamplifier
- Mounting bracket with captive thumb screws
Specifications
| Inputs | 2 × XLR (transformer balanced); 1 × 3.5 mm stereo mini-jack |
|---|---|
| Outputs | Balanced 5-pin XLR; unbalanced 3.5 mm stereo mini-jack (auxiliary, mic level) |
| Maximum input level | −15 dBu (LO gain), −35 dBu (HI gain) |
| Frequency response | 20 Hz – 20 kHz (±1.0 dB) |
| THD + N | 0.012% (LO gain), 0.06% (HI gain), +4 dBu output, 1 kHz |
| Gain | Line out: 40 dB (LO), 60 dB (HI); mic out: 10 dB (LO), 30 dB (HI) |
| Dynamic range | 100 dB |
| Channel separation | 85 dB (LO gain), 80 dB (HI gain), +4 dBu output, 1 kHz |
| Level indicators | Tri-color LED; red over +4 dBu |
| Output clipping level | Line out +25 dBu; mic out −5 dBu |
| Power | External DC input jack (2-pin LEMO), 12–16 V (pin 1 −, pin 2 +) |
| Dimensions (L × W × H) | 4.96 × 3.78 × 1.57 in (126 × 96 × 40 mm) |
| Weight | 374 g (0.82 lb) |
