MVC 121 Plus

Three Input Stereo Mixer with DSP

Key Features

Mixes two microphone inputs and one stereo line input to two stereo outputs
DSP audio signal processing
24-bit/48 kHz analog-to-digital and digital-to-analog converters
Fixed, low latency DSP processing
DSP Configurator™ Software
Intuitive Graphical User Environment

Model	Version Description	Part #
MVC 121 Plus	Three Input Stereo Mixer with DSP	60-1096-01

The Extron MVC 121 Plus is a compact, three input stereo audio mixer featuring a digital signal processing platform for audio signal mixing and control. The MVC 121 Plus features a stereo line level input and two mic/line level inputs with 48 volt phantom power for condenser microphones, plus fixed and variable stereo line level outputs. It offers gain, filter, tone processing, and parametric EQ. Quick and intuitive configuration using the DSP Configurator™ Software allows the MVC 121 Plus to be installed in very little time. The MVC 121 Plus is ideal for presentation applications that require line and microphone audio mixing with DSP in a small form factor.

DSP

The DSP built into the MVC 121 Plus provides wide dynamic range and utilizes 24-bit audio converters with 48 kHz sampling to maintain audio signal transparency. Convenient, easy-to-configure tools are available to control level, high and low pass filters, and bass and treble shelving filters.

Easy-to-Use DSP Configurator Software

The DSP Configurator Software features an intuitive on-screen layout that offers fast access to digital audio signal processing tools as well as audio mixing. Designers can quickly get a snapshot view of the entire audio system, including processing blocks and mix points.

Flexible Mixer

The MVC 121 Plus features a stereo line level input and two mic/line level inputs, each of which are mixed into the fixed and variable stereo line level outputs. It provides a quick and effective solution for adding microphone capability to an existing system. The variable line level output can be sent to a PA system, while the fixed line level output can be routed to an assistive listening system.

Versatile Control Options

The MVC 121 Plus can conveniently be controlled and configured via RS-232 serial control or USB. It also includes digital input ports, which allow for muting.

Features

Mixes two microphone inputs and one stereo line input to two stereo outputs — Two mono microphone or line level inputs are mixed with a stereo line level input to dual stereo line level outputs for fixed and variable audio applications.

Inputs: Two balanced or unbalanced mic/line level on 3.5 mm, 6-pole captive screw connectors; balanced or unbalanced stereo line level on a 3.5 mm, 5-pole captive screw connector

Outputs: Two balanced or unbalanced line level outputs on 3.5 mm, 5-pole captive screw connectors - one fixed, one variable

DSP audio signal processing — The MVC 121 Plus provides gain, filter, and tone processing for quick and easy configuration, and provides unprecedented signal quality in a compact mixer.

48 volt phantom power — The MVC 121 Plus is equipped with selectable 48 volt phantom power for the mic/line level inputs, allowing the use of condenser microphones.

24-bit/48 kHz analog-to-digital and digital-to-analog converters — High performance converters preserve audio signal integrity in input and output signal conversion, while maintaining latency under 1 ms.

Fixed, low latency DSP processing — Input to output latency is fixed within the MVC 121 Plus, regardless of the number of active channels or processes. Fixed, low latency processing keeps audio in sync with video, and prevents distractions to the presenter resulting from delayed live audio.

DSP Configurator™ Software — A powerful yet user-friendly PC-based software tool for managing all audio operations of the MVC 121 Plus. It enables complete setup and configuration of digital audio processing tools as well as mixing.

Intuitive Graphical User Environment — The DSP Configurator Software features a Graphical User Environment that offers a clear view of all inputs and outputs, audio processing blocks, and mix points in a single window. This allows a designer or installer to quickly view an audio configuration without having to access multiple windows or menus.

Fixed and variable stereo line level outputs — The fixed output is ideal for recording devices or other equipment such as ALS - assistive listening systems, while the variable output is designed to drive a power amplifier.

Front panel USB configuration port — Enables easy configuration via the DSP Configurator Software without having to access the mixer's rear panel.

Front panel mix level adjustments for each input

Large front panel knob — Provides direct user access to output volume.

Multi-function LED level indicator — Automatically displays the input gain or output volume setting for the front panel controls, and also acts as an output level meter.

RS-232 control port — Using serial commands, the MVC 121 Plus can be integrated into a control system. Extron products use the SIS™ - Simple Instruction Set command protocol, a set of basic ASCII code commands that allow for quick and easy programming.

Three digital input ports for remote mute triggering — Three digital input ports are provided, so that each input on the MVC 121 Plus can be individually muted by remote trigger.

Live and Emulate operation modes with configuration file saving — Live mode allows integrators to connect to the MVC 121 Plus and make live parameter adjustments while hearing or metering them in real-time. This avoids the need to compile and upload a configuration file to the mixer. Emulation mode allows settings to be configured offline, then uploaded to the MVC 121 Plus. The software also downloads configuration files from the mixer for archiving.

Soft limits provide optimal adjustment range — The volume range for the variable output and the three mix points can be limited using soft limits to maintain optimal minimum and maximum levels when using external volume control. This prevents operators from over or under-adjusting levels when using RS-232 control. The DSP Configurator Software provides quick drag-and-drop adjustment of soft limits.

SpeedNav™ keyboard navigation — SpeedNav enables user-friendly, keyboard-based navigation of the DSP Configurator Software without the need for a mouse or touchpad. Using keyboard navigation keys and shortcuts, the user can access any input or output, mix point, and all audio DSP tools. Using only the keyboard for software access can help expedite audio system setup and optimization while on-site using laptop PCs.

Front panel security lockout — The MVC 121 Plus offers complete front panel security lockout to prevent unauthorized use or tampering.

Rack-mountable 1U, quarter rack width metal enclosure

External Extron Everlast™ power supply included, replacement part #70-1175-01 — Provides worldwide power compatibility with high‑demonstrated reliability and low power consumption. This power supply is compatible with the ZipClip 50 Mounting Kit.

Extron Everlast Power Supply is covered by a 7‑year parts and labor warranty

OPTIONAL ACCESSORIES
	RSB 123	Basic Rack Shelf for 3.5" Deep Products
	RSF 123	Rack Shelf Kit for 3.5" Deep Products
	RFF Series	Basic Rack False Faceplate Kits
	Half Rack Shelf System	Half-Rack Width Rack Shelf and Accessories
	UTS 100 Series	Under Table Shelf System
	MBU 123	Low-Profile Mount Kit for 1/8, 1/4, and 1/2 Rack Width Products
	MBD 129	Through-Desk Mount Kit for 1/4 or 1/2 Rack Width, Two-Piece Enclosures
	ZipClip 50	Mounting Kit for PS 1205 C Power Supply

OPTIONAL ACCESSORIES

RSB 123

Basic Rack Shelf for 3.5" Deep Products

RSF 123

Rack Shelf Kit for 3.5" Deep Products

RFF Series

Basic Rack False Faceplate Kits

Half Rack Shelf System

Half-Rack Width Rack Shelf and Accessories

UTS 100 Series

Under Table Shelf System

MBU 123

Low-Profile Mount Kit for 1/8, 1/4, and 1/2 Rack Width Products

MBD 129

Through-Desk Mount Kit for 1/4 or 1/2 Rack Width, Two-Piece Enclosures

ZipClip 50

Mounting Kit for PS 1205 C Power Supply

RELATED PRODUCTS
	DMP 128 Plus	12x8 ProDSP Digital Matrix Processors
	DMP 128	12x8 ProDSP™ Digital Matrix Processors
	DMP 64	6x4 ProDSP™ Digital Matrix Processor
	DMP 44 LC	4x4 Digital Matrix Processor
	DSP Configurator Software	DSP Application Software

COMPATIBLE SOFTWARE
	DSP Configurator Software	DSP Application Software

SIMILAR PRODUCTS
	MIX 301	Three Channel Line Level Mixer

SIMILAR PRODUCTS

MIX 301

Three Channel Line Level Mixer

Specifications

MVC 121 Plus

Audio

Gain

Unbalanced output: -6 dB; balanced output: 0 dB

Frequency response

20 Hz to 20 kHz, ±0.3 dB

THD + Noise

<0.03% @ 1 kHz, at maximum output level

S/N

>100 dB, 20 Hz to 20 kHz, at maximum output, unweighted

Crosstalk

<-90 dB @ 1 kHz, fully loaded

CMRR

>60 dB @ 1 kHz

Audio input

Number/signal type

Microphone inputs

2 mono, mic/line, balanced/unbalanced

Line input

1 stereo, line, balanced/unbalanced

Connectors

Microphone inputs

(1) 3.5 mm captive screw connector, 6 pole

Line input

(1) 3.5 mm captive screw connector, 5 pole

Impedance

>10k ohms, balanced/unbalanced, DC coupled

Nominal level

+4 dBu when level is set to 0 dB gain; adjustable from -60 dBu to +4 dBu (line input)

Maximum level

+21 dBu, balanced, when input gain is set to 0 dB

Volume range

Line input

-18 dB to +24 dB, adjustable per input

Mic input

-18 dB to +60 dB, adjustable per input

Mic noise level

<-120 dBV (1 µVrms) at 40 dB gain

Mic phantom power

+48 VDC, which can be switched on or off

NOTE	0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu

Audio processing

D/A conversion

24 bit, 48 kHz sampling

Audio output

Number/signal type

2 stereo, line, balanced/unbalanced

Connectors

(2) 3.5 mm captive screw connector, 5 pole

Impedance

50 ohms unbalanced, 100 ohms balanced

Gain error

±0.2 dB channel to channel

Maximum level (Hi-Z)

>+21 dBu, balanced; >+15 dBu, unbalanced

Control/remote — mixer/volume controller

Serial control port

1 bidirectional RS-232: 3.5 mm captive screw connector, 6 pole (uses 3 poles) (shared with digital input)

Baud rate and protocol

9600 to 115200 baud, 38400 baud (default), 8 data bits, 1 stop bit, no parity, no flow control

Serial control pin configuration

1 = Tx, 2 = Rx, 3 = GND

USB control port

1 front panel female mini USB B

USB standards

USB 2.0, low speed

Program control

Extron control/configuration program for Windows^®Extron Simple Instruction Set (SIS^™)

Control — digital input ports

Number/type

3 digital input (configurable)

Connector

(1) 3.5 mm captive screw connector, 6 pole (shared with RS-232 port, uses 4 poles)

Pin configuration

3 = GND; 4, 5, 6 = digital inputs 1, 2, 3

Digital inputs

Input voltage range

0-24 VDC

Input impedance

10k ohms

Threshold low to high

>2.0 VDC

Threshold high to low

<0.8 VDC

General

Power

External
Input: 100-240 VAC, 50-60 Hz
Output: 12 VDC, 0.5 A

Power consumption

Device

3.5 watts

Device and power supply

4.9 watts

Thermal dissipation

Device

9.4 BTU/hr

Device and power supply

14.7 BTU/hr

Ambient 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 rack shelf

Furniture mount

Yes, with optional mini under-desk mounting kit

Pole mount

Yes, with mini pole mount kit

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)

Regulatory compliance

CE, C-tick, c-UL, UL, FCC Class A, ICES, VCCI

Product warranty

3 years parts and labor

Everlast power supply warranty

7 years parts and labor

NOTE	All nominal levels are at ±10%.

NOTE	Specifications are subject to change without notice.

(5793-D6)

Shipping Dimensions and Weights
Part #	Height	Width	Depth	Weight
60-1096-01	2.75" (7.0 cm)	10.12" (25.7 cm)	7.43" (18.9 cm)	1.86 lbs (0.84 kg)

MVC 121 Plus

DSP

Easy-to-Use DSP Configurator Software

Flexible Mixer

Versatile Control Options

Features

Specifications

Diagram

Panel Drawing