DN-312X

12-Channel Line Mixer with Priority


The DN-312X is a 1U rack-mounted 12-channel mixer that can solve countless audio challenges. It features 6 mic/line combination inputs (HDHQ™ Denon-Marantz proprietary mic pre’s) each with switchable phantom power and 6 additional line-level inputs. It has balanced XLR outputs, a 1/4-inch (6.3mm) mono output that can be used to connect the DN-312X to a remote mixer, a pair of RCA stereo outputs to connect to a remote recording device, and 1/4-inch (6.3mm) mic monitoring port that can be used to monitor the mics’ signals. The DN-312X provides individual level control for all inputs in addition to level control for the mono output port and a master level control. Rounding off the feature set, It has a 3-level equalizer and a controlled priority for Mic/Line 1. It can be powered from standard AC or a 24V DC power source, inviting it to be used in a variey of applications; everything from a classtroom to a tour bus.

  • 6 HDHQ™ Combination inputs with MIC, Phantom and Line selector switches
  • 6 mono (3 stereo) RCA Inputs
  • Mic monitor 1/4” output for private listening of all mic inputs
  • Balanced XLR line outputs
  • Mono 1/4” line output can be used to feed audio to external recording device
  • AC or 24V DC power inputs
  • Mic 1 Priority Control
  • Master and Individual level controls
  • 1U rack mountable
  • Input Channels
    • Microphone Input:
      • 6 Balanced XLR Connectors (Channels 1–6)
      • Frequency Response:
        • 20 Hz - 22 kHz

      • THD+N:
        • < 0.03% @ 1 kHz

      • Sensitivity:
        • -40 dBu

      • Maximum Input:
        • -19 dBu

      • Maximum Voltage Gain:
        • 60 dB (Mic Input to Line Out, Mic Out & Mono Out)
        • 50 dB (Mic Input to Rec Out)

      • Signal-to-Noise Ratio:
        • > 103 dB

      • Phantom Power:
        • 18–21 V, switch control


    • Line Inputs:
      • 6 Balanced XLR Connectors (Channels 1–6)
      • Frequency Response:
        • 20 Hz - 22 kHz
        • 20 Hz - 22 kHz

      • THD+N:
        • < 0.03% @ 1 kHz

      • Sensitivity:
        • 0 dBu

      • Maximum Input:
        • +21 dBu
        • +21 dBu

      • Maximum Voltage Gain:
        • 20 dB (Mic Input to Line Out, Mic Out & Mono Out)
        • 10 dB (Mic Input to Rec Out)
        • 10 dB (Line Input to Line Out)
        • 0 dB (Line Input to Rec Out)
        • 4 dB (Line Input to Mono Out)

      • Signal-to-Noise Ratio:
        • > 103 dB

      • Stereo Balanced RCA Connectors (Channels 7/8-11/12)
      • THD+N:
        • < 0.03% @ 1 kHz

      • Sensitivity:
        • +10 dBu

      • Signal-to-Noise Ratio:
        • > 103 dB


    • Impedance:
      • Mic/Line Input:
        • 1.4 kΩ

      • Line Input:
        • > 10 kΩ

      • All Outputs:
        • 120 Ω



  • Equalizer
    • High:
      • +15 dB @ 12 kHz

    • Mid:
      • +12 dB @ 2.5 kHz

    • Low:
      • +15 dB @ 80 Hz


  • Crosstalk
    • Adjacent Inputs:
      • < -70 dB @ 1 kHz (Channels 1–6)
      • < -68 dB @ 1 kHz (Channels 7/8–11/12)

    • Input to Output:
      • < -82 dB @ 1 kHz


  • Main MixOutput
    • Line Output:
      • 0 dBu (+2 dBu), balanced

    • Mic Output, Mono Output:
      • 0 dBu (+2 dBu), unbalanced

    • Maximum Output:
      • +21 dBu balanced/unbalanced, 1/4” (6.35 mm) jacks

    • Noise (Bus):
      • < -83 dB @ 20 Hz – 22 kHz


  • General
    • Power connection:
      • IEC

    • Input Voltage:
      • 100V~, 110-120V~, 50/60Hz; 220-240V~, 50/60Hz or DC24V

    • Dimensions (width x depth x height):
      • 19.0” x 7.7” x 1.7” (483 x 195 x 44 mm)

    • Weight:
      • 6.4 lbs (2.9 kg)


  • DN-312X mixer
  • IEC Cable
  • User Guide
  • Safety and Warranty Manual