Azden FMX-42u 4-Channel USB Portable Audio Mixer

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 white 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.

Azden FMX-42u Features

• 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 (not included)

• FMX-42u 4-Channel USB Portable Audio Mixer1
• Two Year Warranty1

• 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 (WxDxH) without protrusions: 9x3.5x2.25" (220x160x56mm)
  • Weight (without batteries): 2.9 lbs (1.3 kg)
• INPUT
  • Balanced Input: XLR 3-pin Female x 4 (CH1, 2, 3 & 4)
  • Level
    • LINE
      • Standard: +4 dBu (electronically balanced)
      • Maximum: > +26 dBu
      • Impedance: 20kΩ
    • MIC HI
      • Standard: -38 dBu (electronically balanced)
      • Maximum: +4 dBu
      • Impedance: 2Kω
    • MIC LO
      • Standard: -58 dBu (electronically balanced)
      • Maximum: -15 dBu
      • Impedance: 2kΩ
  • 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: 11kΩ
• 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): USB mini-B connector (female)
  • Balanced Level Output
    • +4 dBu
      • LINE
        • Standard: +4 dBu (electronically balanced, 5kΩ load)
        • Maximum: +20 dBu (electronically balanced, 5kΩ load)
    • -36 dBu
      • MIC
        • Standard: -36 dBu (electronically balanced, 5kΩ load)
        • Maximum: -20 dBu (electronically balanced, 5kΩ load)
        • Impedance: 600 Ω
        • Standard: -36 dBu (electronically balanced, 2kΩ load)
        • Maximum: -20 dBu (electronically balanced, 2kΩ load)
        • Impedance: 120Ω
  • Monitor Output
    Max Output:
    • +1 dBu (32Ω load at 9V)
    • 16-100Ω 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: Isocronas 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