Denon DN-312X

Features

Overview: The Denon DN-312X is an ultra slim 1U rack mounted 12-channel mixer that's flexible enough for a variety of applications. It features 6 XLR inputs, that can accept either line or microphone level signals, and 3 pairs of RCA inputs. Outputs consist of 2 XLR line outs along with a single Mono output and a Microphone Monitor output. The mixer can be powered from a standard AC outlet as well as from a 24 VDC source, making it ideal for mobile installations and tour busses, as well as fixed installations like restaurants, education centers, and houses of worship.

Connections: All of the DN-312X's inputs and outputs are located on the rear panel and include the following:

• Channels 1-6: These mono inputs consist of balanced XLR / 1/4" combo jacks, featuring Denon-Marantz's proprietary HDHQ mic preamps, that can accept either mic or line level signals. Each input has a 3-position slide switch for Line, Mic, and PH. The latter setting provides 18 - 21 volts of phantom power for powering a condenser microphone.
• Mic 1 Priority: This level knob determines how loud the volume level of all other inputs will be when Channel 1 Mic/Line input receives an incoming signal. At it's lowest setting, a signal received on Channel 1 will mute all other input signals, while at the highest setting, all other input signals will remain unaffected by a signal on Channel 1. This feature is convenient for paging applications.
• Channels 7-12: These inputs are made up of 3 pairs of unbalanced RCA line inputs for consumer level audio signals.
• Line Out: Balanced Left and Right XLR Line Outs provide the main mixed output signal to an amplifier or PA system.
• Mono Out: This unbalanced 1/4" TS jack provides a summed mono mix of the Line Out signals, for sending to a recording device, remote mixer, or an additional playback system.
• Mic Monitor: When the front-panel Mic On/Off button is pressed (On), signals from the mic/line inputs (channels 1-6) are sent to this output and the main Line Outs are disabled. When the Mic On/Off button is out (Off), all channel signals will be sent to the main Line Outs.
• Rec Out: This pair of RCA jacks provides an unbalanced version of the main Line Out signal, for running to a remote recording device or remote mixer.
• Power Input: Along with the standard AC power input, the mixer also includes 2 set-screw terminals for running it from a 24 VDC (500 mA) power source, such as in a mobile recording unit or a tour bus.

Controls and Indicators: All controls and indicators are located on the front panel and include the following:

• Mic In: This section includes individual rotary level controls for Channels 1-6, along with a Signal LED that lights green when an incoming audio signal is within an optimal range.
• Stereo In: This section includes rotary level controls for each of the 3 RCA stereo inputs, along with a Signal LED for each.
• Mic: This rotary knob works in conjunction with the Mic Monitor output. When the corresponding On/Off button is pressed, inputs 1-6 signals are sent out the Mic Monitor jack with the level controlled by the front-panel Mic knob.
• EQ: Three recessed rotary dials are provided for adjusting the equalization of the output signal.
  • Low: +/- 10 dB @ 80Hz
  • Mid: +/- 10 dB @ 2.5 kHz
  • High: +/- 10 dB @ 80 Hz
• Mono: This rotary knob controls the output level from the rear-panel Mono output jack.
• Master Output: This controls the output level from the Line Output jacks. A corresponding 4-segment LED stereo level meter displays the signal level with indications for Signal, 0 dB, +10 dB, and Clip.
• Power Switch: Also has a corresponding LED indicating if power is On or Off.

Specifications

Input Channels:

• Balanced XLR Microphone Inputs (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:
    • Mic Input to Line Out, Mic Out, and Mono Out: 60 dB
    • Mic Input to Rec Out: 50 dB
  • Signal to Noise Ratio: > 103 dB
  • Phantom Power: 18 - 21 V
• 1/4" Line Inputs (Channels 1-6):
  • Frequency Response: 20 Hz - 22 kHz
  • THD+N: < 0.03% @ 1 kHz
  • Sensitivity: 0 dBu
  • Maximum Input: +21 dBu
  • Maximum Voltage Gain:
    • Line Input to Line Out, Mic Out, and Mono Out: 20 dB
    • Line Input to Rec Out: 10 dB
  • Signal to Noise Ratio: > 103 dB
• Stereo RCA Inputs (Channels 7/8 - 11/12):
  • Frequency Response: 20 Hz - 22 kHz
  • THD+N: < 0.03% @ 1 kHz
  • Sensitivity: +10 dBu
  • Maximum Input: +21 dBu
  • Maximum Voltage Gain:
    • RCA Input to Line Out: 10 dB
    • RCA Input to Rec Out: 0 dB
    • RCA Input to Mono Out: 4 dB
  • Signal to Noise Ratio: > 103 dB
• Impedance:
  • Mic/Line Input: 1.4 kΩ
  • RCA Input: > 10 kΩ
  • All Outputs: 120 Ω

Outputs:

• Balanced Line Output: 0 dBu (+2 dBu)
• Unbalanced Mic Output, Mono Output: 0 dBu (+2 dBu)
• Maximum Output: +21 dBu balanced/unbalanced 1/4" jacks
• Noise (Bus): < -83 dB @ 20 Hz - 22 kHz

Equalizer:

• High: +/- 10 dB @ 12 kHz
• Mid: +/- 10 dB @ 2.5 kHz
• Low: +/- 10 dB @ 80 Hz

Crosstalk:

• Adjacent Inputs:
  • Channels 1-6: < -70 dB @ 1 kHz
  • Channels 7/8 - 11/12: < -68 dB @ 1 kHz
• Input to Output: < -82 dB @ 1 kHz

General:

• Power Connection: IEC 3-pin
• Input Voltage: 100 - 240 VAC, 50/60 Hz or 24 VDC
• Dimensions: Width - 19.0", Height - 1.75", Depth - 11.50" (incl. power cord)
• Weight: 6.4 lbs.