Audio Extension Module AEM-1

Roll sound, roll camera

The Audio Extension Module AEM-1 for ALEXA 35 delivers two channels of studio-quality microphone pre-amplification within a slimline, integrated form factor. Developed by SONOSAX, a leading audio engineering company with a long history of providing high-quality sound equipment for the motion picture industry, the AEM-1 is the perfect companion for shoots where robust in-camera audio is required.

Two incredibly clean microphone pre-amp channels for high-quality onboard audio recording

ALEXA 35 Body + LPL Mount - right - back - AEM-1

Integrated form factor and better workflow thanks to easy mounting

I have worked with the AEM-1 on several shoots now and am completely blown away by the quality and integration. It drastically reduces time in post by not having to sync sound from external recording devices.

Daniel Green

Director l cinematographer

The pre-amps are great! Nice and clean, no major color - just solid tone and level!

Stephen "Koz" Kozmeniuk

Record producer, songwriter, engineer, and instrumentalist

Excellent pre-amps and sound quality. It integrates perfectly with the camera body and B-mount. It’s on the back, not the side, so good for balance.

Noah Stout

Founder of Stout Film, Inc.

Inputs & outputs

1   MIC/LINE-IN 1 input for TA3F (Mini XLR) connector
2   MIC/LINE-IN 2 input for TA3F (Mini XLR) connector
3   AES input for TA3F (Mini XLR) connector
4   24 V 3-pin Fischer connector (max. 4.0 A)
5   12 V 2-pin Lemo connector (max. 2.0 A)
6   Headphone output 3.5 mm jack
7   User display
8   Rotary encoder for phones level and menu navigation
9   Menu button
10 Back button
11 Rotary encoder for gain MIC/LINE-IN 1
12 Rotary encoder for gain MIC/LINE-IN 2
13 USB-C port (used for firmware update)

Technical data

Model	Audio Extension Module AEM-1
Measurements (HxWxL)	132.50 x 119.45 x 34.72 mm
Weight	504 g / 1,111 lbs
Operating Temperature	-20°C - +45°C
Power Outputs	1x 24 V 3-pin Fischer connector (max. 4.0 A) 1x 12 V 2-pin Lemo connector (max. 2.0 A)
Analog Audio Inputs	2x balanced MIC/LINE inputs on TA3 connectors with 48 V phantom power (max. 10 mA) switchable on each channel, +20 dB pre-gain, analog first order low frequency cut filter, dual-ADC, phase reversal, adjustable second order digital low frequency cut filter, gain and limiter
Maximum Input Level	+18 Bu (with Primary Gain 0 B) -2 dBu (with Primary Gain +20 dB)
Frequency Response	20 Hz - 90 kHz
Low Frequency Cut Filter	3rd order hybrid (1st order analog) adjustable Low Frequency Cut filter, 60 to 320 Hz, 20 Hz steps
Dynamic Range	135 dB (with Primary Gain 0 dB) 129 dB (with Primary Gain +20 dB)
Noise LIN 22-22 kHz	-133 dBFS (with Primary Gain 0 dB) -127 dBFS (with Primary Gain +20 dB)
Noise ASA A	-135 dBFS (with Primary Gain 0 dB) -129 dBFS (with Primary Gain +20 dB)
Equivalent Input Noise 22-22 kHz 150 ohm	-112 dBu (with Primary Gain 0 dB) -126 dBu (with Primary Gain +20 dB)
THD	< 0.001%
Digital Audio Input	1x AES3 input on TA3 connector with Asynchronous Sample Rate converter (ASRC) with input sampling rate from 6 to 192kHz
ASRC Dynamic Range	139 dB (A-weighted)
Headphone Output	1x stereo mini jack unbalanced output for headphones with full monitoring