Azden FMX-42U 4 Channel Portable Microphone/Line Mixer with USB Digital Audio Output

Azden’s FMX-42 portable mixer has been trusted by audio professionals in the field for over a decade. Its extensive set of features, handcrafted quality and affordability have made it one of the most popular portable mixers on the market. Now with the new FMX-42u, Azden has added a USB digital audio output for even more flexibility.

The USB Out on the FMX-42u is designed to connect to a computer, smartphone or tablet and acts as a secondary stereo audio output (necessary USB cables and adapters are not included but readily available from electronics suppliers). This flexible feature could now allow you to use a mobile device or laptop computer as a backup digital recorder, use up to 4 XLR microphones while shooting video with a smartphone or tablet, or even use the FMX-42u as an in-studio mixer for web streaming or podcasting.

Of course the FMX-42u still boasts the many features of its predecessor, which include 4 balanced XLR line/mic inputs with individual level and pan controls, switchable (per channel) 48V phantom power and limiting, professional quality VU meters for accurate level setting, master level control, 1k tone generator, 2 balanced XLR outputs (line/mic switchable), stereo mini-jack output for DV cameras and a headphone output with level control.

The FMX-42u can be powered by either 6 internal “AA” batteries or an optional 12V DC external power supply (Azden part #BC-27H). A ballistic nylon carrying case is included.

Key Features

• Handcrafted in Japan
• 2 Channel USB digital audio output
• USB out connects to computer, smartphone or tablet
• 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
• 6x AA battery powered
• Optional A/C adapter

Technical Specifications

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 Balanced Output
-120 dBu (A weighted, input equivalent level)
T.H.D. Balanced Output
< 0.005% @ 1 kHz (at LINE position +19 dBu output)
Phantom Power Voltage
48V (-1.5V)
Sample Tone Frequency
1 kHz
Battery Requirement
6 Alkaline "AA"
External Power
10.5 ~ 17V DC @ 200mA
Dimensions
220mmW x 160mmD x 56mmH (without protrusions)
9"W x 6 1/2" D x 2 1/4"H (without protrusions)
Weight
1.3 kg / 2.9 lbs (without batteries)

INPUT
Balanced Input
XLR 3-pin Female x 4 (CH1, 2, 3 & 4)

Level
Line: Standard: +4 dBu (electronically balanced)
Maximum: > +26 dBu
Impedance: 20k ohm

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

MIC LO Standard: -58 dBu (electronically balanced)
Maximum: -15 dBu
Impedance: 2k ohm

High Pass Filter (HPF)
100Hz - 6dB/oct
Return Inputs (FMX-42a)
Hirose 10-pin Female for Hirose Plug Part #RM15TD-10P
3.5mm (1/8") Stereo Mini-Jack
Input Level
-20 dBu - +19 dBu (unbalanced)
Impedance
11k ohm
OUTPUT
Balanced Outputs
XLR 3-pin Male x 2 (Output L & R)
Hirose 10-pin Female for Hirose Plug (FMX-42a only)
Unbalanced Output
3.5mm (1/8") Stereo Mini-Jack
Monitor Output
6.3mm (1/4") Stereo Jack
Digital Signal Output (FMX-42u only)
USB mini-B connector (female)

Balanced Level Output
+4 dBu: LINE: Standard: +4 dBu (electronically balanced, 5k ohm load)
Maximum: +20 dBu (electronically balanced, 5k ohm load)
Impedance: 600 ohm

-36 dBu: MIC: Standard: -36 dBu (electronically balanced, 5k ohm load)
Maximum: -20 dBu (electronically balanced, 5k ohm load)
Impedance: 600 ohm

Unbalanced Output Level: Standard: -36 dBu (electronically balanced, 2k ohm load)
Maximum: -20 dBu (electronically balanced, 2k ohm load)
Impedance: 120 ohm

Monitor Output: Max Output: +1 dBu (32 ohm load at 9V)
16-100 ohm load recommended

Meters: Standard Output Level: 0 VU (+4 dBu)

DIGITAL SIGNAL OUTPUT (FMX-42u Only)
Interface Format
USB 2.0 Full Speed
Audio Data Format
Isochronous Data Format
Sampling Frequencies
16 / 22.05 / 32 / 44.1 / 48 kHz Compatible
Bit Depth
8 / 16 bit Compatible
Channels
2
Device Name
USB AUDIO CODEC
In The Box
FMX-42u mixer
Nylon carrying case
Manual