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0 to 92 ("off", and -79 dB to +12 dB in 0.5 dB steps) Mic 1, 2, and Main 3 gain range .. -79 dB to +12 dB in 0.5 dB steps Frequency response...................... 20 Hz to 20 kHz, ±0.05 dB THD + Noise.................................. 0.03% @ 1 kHz at nominal level S/N.................................................. >90 dB, balanced, at maximum output Crosstalk......................................... <-80 dB @ 1 kHz, <-60 dB @ 20 kHz, fully loaded Stereo channel separation............ >80 dB @ 1 kHz, >60 dB @ 20 kHz CMRR.............................................. >75 dB @ 20 Hz to 20 kHz All input gain default settings are at 80. The master volume default setting is 50 (-30 dB). Audio input Number/signal type Microphone inputs............ 2 mono, balanced/unbalanced Main input.......................... 1 stereo, balanced/unbalanced Connectors Microphone inputs............ (1) 3.5 mm captive screw connector, 5 pole Main input.......................... (1) 3.5 mm captive screw connector, 5 pole Impedance...................................... >10k ohms, DC coupled Nominal level (mic inputs) DIP switch = line level...... -30 dBV (32 mV) for a wireless microphone DIP switch = mic level...... -60 dBV (1 mV) for a wired microphone Nominal level (main input)......... -10 dBV (316 mV) Maximum level.............................. +20 dB above nominal level, (balanced or unbalanced) at 1% THD+N Input gain adjustment.................. -79 dB to +12 dB, adjustable per input Input level sensitivity (mic inputs) DIP switch = line level...... -42 dBV (8 mV) for nominal output DIP switch = mic level...... -72 dBV (0.25 mV) for nominal output Input level sensitivity (main input) -22 dBV (79 mV) for nominal output 0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV « 2 dBu Audio output Number/signal type..........................................2 stereo, balanced/unbalanced Connectors..........................................................................(2) 3.5 mm captive screw connector, 5 pole Impedance............................................................................50 ohms unbalanced, 100 ohms balanced Gain error..............................................................................±0.1 dB channel to channel Nominal level................................................................+4 dBu (1.23 V), balanced output (when gain is set to +6 dB) -10 dBV (0.316 V), unbalanced output Maximum level (Hi-Z)..................................>+24 dBu, balanced; >+18 dBu, unbalanced at 1% THD+N Maximum level (600 ohm)......................>+15 dBm, balanced at 1% THD+N Control/remote— mixer/volume controller Serial control port.......................... RS-232, 3.5 mm female captive screw connector (3 poles of a 6 pole connector) Baud rate and protocol................. 9600, 8-bit, 1 stop bit, no parity Serial control pin configurations. 1 = TX, 2 = RX, 3 = GND NOTE Extron MVC 121 Mic/Line Mixer and Volume Controller • Specifications 1 Specifications — MVC 121, cont'd Contact closure mute control....... 1 = mic 1, 2 = mic 2, 3 = main input Program control............................. Extron's control program for Windows® Extron's Simple Instruction Set (SIS™) General External power supply................. 100 VAC to 240 VAC, 50/60 Hz, external; to 12 VDC, 1 A, regulated Power input requirements........... 12 VDC, 0.5 A. Temperature/humidity................ Storage -40° to +158°F (-40° to +70°C) / 10% to 90%, noncondensing Operating +32° to +122°F (0° to +50°C) / 10% to 90%, noncondensing Cooling........................................... Convection, no vents Mounting Rack mount........................ Yes, with optional 1U, 9.5" deep rack shelf (RSU 129, #60-190-01; RSB 129, 60604-01); 1U, 6" deep rack shelf (RSU 126, #60-190-10; RSB 126, 60-604-10); or VersaTools® 1U, 3.5" deep rack shelf (RSF 123, #60-190-20; RSB 123, 60-604-20) Furniture mount................ Yes, with optional VersaTools mini under-desk mounting kit, part #70-212-01 (MBU 123) Pole mount......................... Yes, with VersaTools mini pole mount kit, part #70-217-01 (PMK 100) Enclosure type............................... Metal Enclosure dimensions................... 1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide) (4.3 cm H x 10.9 cm W x 7.6 cm D) (Depth excludes connectors and knobs.) Product weight.............................. 0.6 lbs (0.3 kg) Shipping weight............................ 3 lbs (2 kg) Vibration......................................... ISTA 1A in carton (International Safe Transit Association) Regulatory compliance Safety................................... CE, CUL, UL EMI/EMC.......................... CE, C-tick, FCC Class A, ICES, VCCI MTBF............................................... 30,000 hours Warranty......................................... 3 years parts and labor All nominal levels are at ±10%. Specifications are subject to change without not...