Extron electronic MVC 121 User Manual

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Extron
SW 6AV

Audio Switcher

Extron
MVC 121

Mixer/Volume
Controller

Audio
Recorder

RS-232
Control

Wireless
Microphone

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Extron
SI 26

Surface-Mount
Speaker

Extron
HPA 502

Half Rack Power
Amplifer

www.extron.com

© 2008 Extron Electronics. All rights reserved.
Pricing and specifications may change without notice.

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MVC 121

MVC - Microphone Volume Control and Line Level Mixer

m i xe r s

feAtures

• Mixes two microphone inputs and a stereo line level input

• Inputs: Captive screw connectors

• Outputs: Captive screw connectors

• Audio mixing and volume control via front panel or RS-232

• Two microphone inputs with mic/line level option - DIP switch-selectable

• 48 volt phantom power for condenser microphones

• Fixed and variable line level outputs

• Smooth, 0.5 dB volume transitions

• Front panel volume level LEDs

• Individual volume adjustmen

• Contact closure mute control

• Front panel security lockout

• Rack-mountable 1U, quarter rack width metal enclosure

• External universal power supply included, part # 70-055-01

descriPti on

The Extron MVC 121 is a high performance Microphone Volume Control and Line Level
Mixer. Equipped with RS-232 control capability, the MVC 121 is easy to integrate into existing
A/V systems where control needs to be simple and centralized, including such environments
as small classrooms and meeting rooms. The MVC 121 is designed for intuitive operation
with two microphone/line level inputs and a third, line level-only input, each with its own
volume control. The mixer also provides 48V microphone phantom power to enable the use of
condenser microphones.

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

Aud io out Put

Number / Signal type . .. .. . .. .. . 2 stereo, balanced/unbalanced

Connectors . .. .. . .. .. . .. .. . .. .. .. . (2) 3.5 mm captive screw connector, 5 pole

Impedance .. .. . .. .. . .. .. . .. .. . .. .. 50 ohms unbalanced, 100 ohms balanced

Nominal level . .. . .. .. . .. .. . .. .. . . +4 dBu (1.23 V), balanced output (when gain is set to +6 dB)

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

-10 dBV (0.316 V), unbalanced output

con tro l / re mot e — mi xer / Vol ume co ntr oll er

Serial control port . .. .. . .. .. . .. .. RS-232, 3.5 mm female captive screw connector (3 poles of a 6 pole connector)

Contact closure mute control . 1 = mic 1, 2 = mic 2, 3 = main input

Gen erA l

External power supply . .. . .. .. . 100 VAC to 240 VAC, 50/60 Hz, external, universal; to 12 VDC, 1 A, regulated

Power input requirements .. . .. 12 VDC, 0.5 A

Rack mount . .. . .. .. . .. .. . .. .. . .. . Yes, with optional rack shelves (See optional accessories.)

Enclosure type .. .. .. . .. .. . .. .. . .. Metal

Enclosure dimensions . .. .. . .. .. 1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide)

Product / Shipping weight . .. .. 0.6 lbs (0.3 kg) / 3 lbs (2 kg)

4.3 cm H x 10.9 cm W x 7.6 cm D (Depth excludes connectors and knobs.)

sPecificAt io ns

Aud io

Gain from mic input to both
fixed and variable outputs at
default settings

Mic DIP switch = line level .. . .. .. Unbalanced output: +20 dB; balanced output: +26 dB

Mic DIP switch = mic level .. .. . .. Unbalanced output: +50 dB; balanced output: +56 dB

Gain from main input to both
fixed and variable outputs at

default settings .. .. . .. .. .. . .. .. . . Unbalanced output: 0 dB; balanced output: +6 dB

Master volume range .. . .. .. . .. . 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

NOTE: All input gain default settings are at 80. The master volume default setting is 50 (-30 dB).

Aud io inP ut

Number / Signal type

Microphone inputs .. .. . .. .. . .. .. . . 2 mono, balanced/unbalanced

Main input . .. .. . .. .. . .. .. .. . .. .. . .. 1 stereo, balanced/unbalanced

model Version d escriPtion PArt #

MVC 121 Microphone & Line Level Mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-572-01

oPtionAl Accessorie s model des criPtion PAGe PArt #

RSU 129 1U 9.5" Deep Universal Rack Shelf Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 819 60-190-01

RSF 123 1U 3.5" Deep VersaTools® Rack Shelf Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 818 60-190-20

RSB 129 1U 9.5" Deep Basic Rack Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 820 60-604-01

RSB 123 1U 3.5" Deep Basic Rack Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 818 60-604-20

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