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

Model #FMX-42A

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Packaging Info

Package Weight 3.5 lb
Box Dimensions (LxWxH) 10.9 x 9.3 x 5.7"


Digital Output No
Balanced Output XLR 3-pin male x 2 (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 ohms load recommended
Meters Standard Output Level: 0 VU (+4 dBu)


High Pass Filter 100 Hz - 6 dB/oct
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
Input Level -20 to +19 dBu (unbalanced)
Balanced Input XLR 3-pin female x 4 (CH1, 2, 3 & 4)
Impedance 11 kOhms
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


Battery Requirement 6x 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
Weight 3.0 lb (1.35 kg), without batteries
Dimensions 9.0 x 6.5 x 2.3" (220 x 160 x 56.0 mm), without protrusions
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:
Phantom Power 48 V (±1.5 V)
Sample Frequency 1 kHz
User Reviews
B h photo.34921152
26 July 2012

I used this mixer for the better part of a season on an ocean focused natural history show. Complete run and gun. Its packed with features. No rust from salt water spray (yet). It's been banged up from a lot of travel (always in a checked in pelican) and didn't miss a beat.

B h photo.34921152
29 April 2015

Great for when I don't have an audio guy, or for my PA to run audio. The Meters are a bit finicky, but you can calibrate them and they are more than passable. Best if you can also see the camera's meters while operating for a little extra confidence if you want to ride the levels on the higher side.

B h photo.34921152
19 January 2014

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.

B h photo.34921152
17 November 2011

I use this mixer for location/eng sound for video production. The mixer is built solid and has all the functions needed for location sound. I like the VU meters and the limiters work well.For the low price...well worth it.

B h photo.34921152
5 March 2012

I use it for mixing during deposition recordings. It is quick to set up. Easy to manage the levels. Built in 1khz tone. The slate mic means I don't have to set up another mic just for announcements.

B h photo.34921152
13 May 2015

As an old field soundo sneaking back into the game, I was on the lookout for a field mixer that reminded me of the old Sony MXP42 I used to run. Without the first up cost! Found it. I think a lot of people would say the standard thing of, too cheap, Rubbish, and such, but for the price?

B h photo.34921152
23 December 2013

Got it on Tuesday used it for a 4 camera shoot on Wednesday. Very impressed with the sound quality.

B h photo.34921152
28 November 2011

This little mixer has a great set of features and is a lot of mixer for the money. The individual control over phantom power on each channel, as well as the individual gain adjustments on each input are extremely useful.

B h photo.34921152
19 November 2011

Great mixer and made in Japan. Very reliable and pro sound. You won't regret buying it.

B h photo.34921152
1 June 2011

I use this for doing production sound and for the price point, this unit works well and is quite quiet. I run this unit into a Sound Devices 702 and get consistently good results. It's easy to use and pretty rugged. I'm using it until I upgrade to an Sound Devices 788 or Zaxcom Deva.

Product Highlights
  • 4 XLR Inputs
  • Phantom Power
  • Input Limiter
  • 2 Balanced Mic/Line XLR Outputs
  • Make Backup Recordings Using 1/8" Output
  • Monitor Camera Using 10-Pin or 1/8" Return
In The Box
  • Azden FMX-42a 4-Channel Microphone Field Mixer with 10-Pin Camera Return
  • Nylon Carrying Case
  • Limited 2-Year Warranty
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