Denon DN-312X Rack Mount 12-Channel Line MixerDenon's DN-312X is a 1U rack-mounted 12-channel mixer that can solve countless audio challenges. It features 6 mic/line combination inputs (with 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 variety of applications; everything from a classroom to a tour bus.
Mic/Line Input Specifications (CH 1-6): • Frequency response: 20 - 22,000 Hz (±2 dBu) • Mic/line input jacks: XLR + 1/4" combination, electronically balanced, discrete input configuration • THD+N: < 0.03% (@ 1 kHz) • Sensitivity: -40 dBu • Maximum input level: -19 dBu • Maximum voltage gain: 60 dB (mic input to line, mic, and mono out); 50 dB (mic input to record out) • SN ratio: > 103 dB • Phantom power: +18 - 21V, switchable.
Line Input Specifications (CH 1-6): • Same as above, except: Sensitivity: 0 dBu • Maximum input level: +21 dBu • Maximum voltage gain: 20 dB (mic input to line, mic, and mono out); 10 dB (mic input to record out)
Line Input Specifications (CH 7/8 - 11/12): • Line input jacks: Stereo RCA pairs, electronically balanced • Sensitivity: +10 dBu • Maximum input level: +21 dBu • Maximum voltage gain: 10 dB (line input to line out); 0 dB (line input to record out); 4 dB (line input to mono out) • SN ratio: > 103 dB.
General Specifications: • Impedance: Mic/line input: 1,400 ohms; line input: > 10,000 ohms; all outputs: 120 ohms • Supply voltage: 120 VAC, 60 Hz • Weight: 6.4 lbs. (2.9 kg) • Dimensions (with rack ears): 19.00" x 7.7" x 1.73" (483 x 195 x 44 mm).
Denon DN-312X Rack Mount 12-Channel Line Mixer Manual 
California Prop 65