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Azden FMX-42a 4-Channel Microphone Field Mixer with 10-Pin Camera Return

BH #AZFMX42A • MFR #FMX-42A
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Azden FMX-42a 4-Channel Microphone Field Mixer with 10-Pin Camera Return
Key Features
  • 4 XLR Inputs
  • Phantom Power
  • Input Limiter
  • 2 Balanced Mic/Line XLR Outputs
The Azden FMX-42a is a portable 4-channel audio mixer designed for professional and semi-professional field audio capturing. Equipped with both mini-jack and 10-pin camera returns, the FMX-42a also features 4 balanced 3-pin XLR microphone inputs with individually switched +48V phantom power. A pair of balanced XLR outputs provide line or mic level (switchable) signal to cameras, recorders, etc.
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Azden FMX-42a Overview

The Azden FMX-42a is a portable 4-channel audio mixer designed for professional and semi-professional field audio capturing. Equipped with both mini-jack and 10-pin camera returns, the FMX-42a also features 4 balanced 3-pin XLR microphone inputs with individually switched +48V phantom power. A pair of balanced XLR outputs provide line or mic level (switchable) signal to cameras, recorders, etc.

Additional features include a switchable input limiter to reduce the possibility of overload distortion, Left/Center/Right pan switches on all input channels, and enhanced circuitry for improved signal-to-noise ratio. The FMX-42a can be powered either by 6 AA batteries or an optional 12 VDC external power supply. A ballistic nylon carrying case is included.

The FMX-42a is an affordable field mixing solution for event videos, ENG/EFP applications, documentaries, and more.

Features:
  • On-board A/D converter and 2-channel mini-USB digital audio output
  • Mini-USB output connects to computer, smartphone, or tablet
  • Simultaneous use of both outputs allows the analog signal to be sent to the camera while a backup digital signal can be sent to a smartphone or tablet or computer via mini-USB
  • 4 balanced XLR line/mic inputs and pan controls
  • Switchable 48V phantom power and limiting
  • Professional-quality VU meters
  • 2 balanced XLR outputs (line/mic switchable)
  • Stereo mini-jack output for DV cameras
  • 6 x AA battery powered
  • Optional A/C adapter (sold separately)
UPC: 095528070062

Azden FMX-42a Specs

Input
Balanced Input
4 x XLR 3-pin female (CH 1, 2, 3 & 4)
Level
Line-
Standard: +4 dBu (electronically balanced)
Maximum: > +26 dBu
Impedance: 20 kOhms

MIC HI-
Standard: -38 dBu (electronically balanced)
Maximum: +4 dBu
Impedance: 2 kOhms

MIC LO-
Standard: -58 dBu (electronically balanced)
Maximum: -15 dBu
Impedance: 2 kOhms
High Pass Filter
100 Hz - 6 dB/oct
Input Level
-20 to +19 dBu (unbalanced)
Impedance
11 kOhms
Return Input
Hirose 10-pin female for Hirose plug part #RM15TD-10P
1/8" / 3.5 mm stereo mini-jack
Input level: -20 to +19 dBu (unbalanced)
Impedance: 11 kOhms
Output
Balanced Output
2 x XLR 3-pin male (output L & R)
Unbalanced Outputs
1/8" / 3.5 mm stereo mini-jack
Monitor Output
1/4" / 6.3 mm stereo jack
Balanced Output Level
LINE-
Standard: +4 dBu (electronically balanced, greater than 10 kOhms load)
Maximum: +20 dBu (electronically balanced, greater than 10 kOhms load)
Impedance: 600 ohms

MIC-
Standard: -36 dBu (electronically balanced, greater than 10 kOhms load)
Maximum: -20 dBu (electronically balanced, greater than 10 kOhms load)
Impedance: 600 ohms
Unbalanced Output Level
Standard: -36 dBu (electronically balanced, 10 kOhms load)
Maximum: -20 dBu (electronically balanced, 10 kOhms load)
Impedance: 120 ohms
Monitor Output
Max Output: +1 dBu (32 Ohm load at 9 V), 16 - 100 Ohm load recommended
Meters
Standard Output Level: 0 VU (+4 dBu)
Digital Output
No
General
Frequency Response
Balanced or Unbalanced Output: 20 Hz - 30 kHz (+0/-1.5 dB)
Monitor Output: 30 Hz - 30 kHz (+0/-2 dB)
Signal-to-Noise Ratio
Balanced Output: -120 dBu (A weighted, input equivalent level)
THD
Balanced Output: < 0.005% @ 1 kHz (at LINE position +19 dBu output)
Phantom Power
48 V (±1.5 V)
Sample Frequency
1 kHz
Battery Requirement
6 x alkaline AA
Current Drain
164 mA (Meter Illum & Phantom OFF @ 9 V)
192 mA (Meter Illum OFF, Phantom ON w/1 MIC @ 9 V)
125 mA (Meter Illum & Phantom OFF @ 15 V)
External Power
10.5 ~ 17 VDC @ 200 mA
Dimensions
9.0 x 6.5 x 2.3" / 220 x 160 x 56 mm (without protrusions)
Weight
3.0 lb / 1.35 kg (without batteries)
Packaging Info
Package Weight
3.645 lb
Box Dimensions (LxWxH)
10.4 x 6.85 x 3.75"

Azden FMX-42a Reviews

Great features at a greater price.

By Robert
Rated 5 out of 5
Date: 2021-05-19

This field mixer is packed with features at a price that can't be beat. You can use internal batteries or use a camera battery with a D-Tap and cable to supply long lasting power. There are two versions of this mixer, one with camera return and one with digital output. Make sure you get the version you want. I accidentally got the digital output version and had to return it. Recommended accesories for this mixer: 1) Sachtler Lightweight Audio Bag (Small) - BH# SALWABS 2) Breakaway Audio Cable - BH# RECABCFP33 3) CAMVATE D-Tap to 4-Pin Hirose Cable - BH# CAC2379 4) Core SWX Nano-U98 14.8V Battery with D-Tap - BH# CONU98

Great but not perfect

By Ramzi
Rated 4 out of 5
Date: 2014-01-19

I used this on a 30 day shoot where the production had their own equipment. Was connected to a zoom H4 for recording. the controls are great the master volume is amazing to use and makes things handy, the pan is easy and flexible. it really amazed me how feature filled with a great quality, one beyond what i expected. the problem which makes using this a nightmare is the level meter... they lack accuracy, are not relevant and are too fast to control your levels. We bypassed this problem by checking the levels on the zoom instead.

See any errors on this page?

Are li-ion batteries recommended? Any gotchas I ...

Are li-ion batteries recommended? Any gotchas I should worry about?
Asked by: James
Thanks, I should have been more specific! I've got some wonderful rechargeable li-ion AA batteries. I'm wondering if those would work or whether the circuitry in the battery compartment is adequate for them.
Answered by: James
Date published: 2025-05-19
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