MVC 121 xi New

Three Source Audio Mixer with DSP

Key Features

Mixes two microphone inputs and one stereo line input to two stereo outputs
Audio DSP on all inputs
Selectable front panel input and output level adjustment
DSP Configurator Pro provides an intuitive graphical user environment
Four digital input ports for remote mute triggering
Predictable, low latency hardware DSP

Model	Version Description	Part #
MVC 121 xi	Three Source Audio Mixer with DSP	60-2048-01

The Extron MVC 121 xi is a compact, three source audio mixer featuring audio DSP for mixing and signal processing. The MVC 121 xi provides 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, filters, bass and treble tone controls, along with parametric EQ. Quick and intuitive configuration of essential parameters is possible using the front panel controls or DSP Configurator Pro software. The MVC 121 xi is ideal for basic presentation applications that require line and microphone audio mixing with audio DSP in a small form factor.

Audio DSP

The audio DSP built into the MVC 121 xi 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 levels, filters, dynamics processing, bass and treble shelving filters, and parametric EQ.

Easy-to-Use DSP Configurator Pro Software

DSP Configurator Pro 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 xi 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 is a quick and effective audio mixing solution for adding microphone capability to a new or 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 xi can conveniently be controlled and configured via RS-232 serial control or USB. It also includes digital input ports, which allow for external muting control without a control system.

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 fixed and variable stereo line level outputs.

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, 6-pole captive screw connector

Outputs: Two balanced or unbalanced line level outputs on 3.5 mm, 6-pole captive screw connectors - one fixed, one variable

Audio DSP on all inputs — The MVC 121 xi provides gain, filter, and tone processing for quick and easy audio system configuration.

Selectable front panel input and output level adjustment — A large rotary encoder and three select buttons provide Group adjustment, which is displayed on an eight segment LED. When no input is selected, the encoder controls the variable output level and the display indicates the output level.

DSP Configurator Pro provides an intuitive graphical user environment — A powerful and user-friendly PC-based software tool for managing all audio operations of the MVC 121 xi. It enables complete setup and configuration of digital audio processing tools with a clear view of all inputs and outputs, audio processing blocks, routing, and mix points in a single window.

Four digital input ports for remote mute triggering — Four digital input ports are provided, so that each input and the variable output can be individually muted by remote trigger.

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

48 volt phantom power — The MVC 121 xi is equipped with selectable 48 volt phantom power for the mic inputs, enabling the use of condenser microphones.

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

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.

Multi-function LED level indicator — Displays the selected input gain adjustment or output volume setting and acts as an output level meter.

Front panel USB-C configuration port — Enables easy configuration via DSP Configurator Pro software without having to access the rear panel.

Deployable without software — Quick and intuitive configuration of essential parameters is possible using only the front panel controls.

RS-232 control port — Using SIS commands, the MVC 121 xi can be integrated into a control system.

Live and Emulate operating modes with configuration file saving — Live mode allows integrators to connect to the MVC 121 xi with DSP Configurator Pro to 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 DSP. Emulation mode allows settings to be configured offline, then uploaded to the MVC 121 xi. The software also downloads configuration files from the mixer for archiving.

Soft limits provide optimal group master adjustment range — Group master volume range 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. DSP Configurator Pro provides quick software control of soft limits from the Group Controls screen.

Front panel security lockout — The MVC 121 xi offers various levels of front panel security lockout to prevent unauthorized use in permanent installations.

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
	RSF 123	Rack Shelf Kit for 3.5" Deep Products
	RSB 123	Basic Rack Shelf for 3.5" Deep Products
	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
	RFF Series	Basic Rack False Faceplate Kits
	ZipClip 50	Mounting Kit for PS 1205 C Power Supply

OPTIONAL ACCESSORIES

RSF 123

Rack Shelf Kit for 3.5" Deep Products

RSB 123

Basic Rack Shelf for 3.5" Deep Products

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

RFF Series

Basic Rack False Faceplate Kits

ZipClip 50

Mounting Kit for PS 1205 C Power Supply

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	DMP 128 Plus	12x8 ProDSP Digital Matrix Processors
	DMP 44 xi	4x4 Digital Matrix Processor
	DMP 64	6x4 ProDSP™ Digital Matrix Processor
	DMP 128	12x8 ProDSP™ Digital Matrix Processors
	MPA 152 Plus	Stereo Amplifier - 15 Watts Per Channel

COMPATIBLE SOFTWARE
	DSP Configurator Pro	Audio DSP Control and Configuration Software

SIMILAR PRODUCTS
	MIX 301	Three Channel Line Level Mixer

SIMILAR PRODUCTS

MIX 301

Three Channel Line Level Mixer

Specifications

MVC 121 xi

Audio system

Gain

Balanced output

0 dB

Unbalanced output

-6 dB

Frequency response

20 Hz to 20 kHz, ±0.3 dB

THD + Noise

<0.02%, 20 Hz to 20 kHz
At maximum balanced output (unweighted)

S/N

Analog Input to Analog Out

>100 dB, 20 Hz to 20 kHz
At maximum balanced output (unweighted)

Crosstalk

<-90 dB @ 20 Hz to 20 kHz, fully loaded

Calibration reference

A/D

1 kHz, +4.0 dBu sine (1.228 Vrms) = -17 dBFS

D/A

1 kHz, -17 dBFS sine = +4.0 dBu (1.228 Vrms)

Audio input

Mic/Line Inputs (1-2)

Microphone inputs

2 mono, mic/line, balanced/unbalanced

Connectors

(1) 6-pole, 3.5 mm captive screw, dual-mono, balanced/unbalanced

Impedance

>10k ohms balanced or unbalanced

Nominal level

+4 dBu when level is set to 0 dB gain; adjustable from −60 dBu to +4

Maximum level

+21 dBu (at rated THD + N) when input gain is set to 0 dB

Equivalent input noise

<-120 dBV (1 µVrms) (at 40 dB input gain)

CMRR

>65 dB typical

Input gain adjustment

-18 dB to +60 dB in 0.1 dB steps, adjustable per input

Phantom power

+48 VDC, (enabled or disabled via software and the front panel)

Line Level Input

Number/signal type

1 stereo, line-level, balanced/unbalanced

Connectors

(1) 6-pole, 3.5 mm captive screw, stereo, balanced/unbalanced

Impedance

>10k ohms balanced/unbalanced

Nominal level

+4 dBu when level is set to 0 dB gain; adjustable from −60 dBu to +4 dBu

Maximum level

+21 dBu (at rated THD + N) when input gain is set to 0 dB

Equivalent input noise

<-120 dBV (1 µVrms) at 40 dB input gain

CMRR

>60 dB typical

Input gain adjustment

-18 dB to +24 dB in 0.1 dB steps, adjustable per input

Audio Output (Variable L/R, Fixed L/R)

Number/signal type

2 stereo, line-level, balanced/unbalanced

Connectors

(2) 6-pole, 3.5 mm captive screw, stereo, balanced/unbalanced

Impedance

100 ohms with balanced lines (or 50 ohms with unbalanced lines)

Gain error

±0.1 dB channel to channel

Maximum level (Hi-Z)

>+21 dBu balanced, >+15 dBu unbalanced

Output Attenuation (VARIABLE)

-100 dB to 0 dB (controlled in 0.1 dB steps)

Output Gain (FIXED)

-24 dB to +12 dB (controlled in 0.1 dB steps)

Audio processing

A/D, D/A conversion

24-bit / 48 kHz PCM

NOTE	0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu; All nominal levels are at ±10 %.

External Control (RS-232)

Serial control port

(1) 3-pole, 3.5 mm captive screw

Protocol and baud rate

Bidirectional RS-232: 38400 baud, 8 data bits, 1 stop bit, no parity

Pin configuration

Pin-1 = “Tx”, Pin-2 = “Rx”, Pin-3 = “G”

USB control port

1 front panel USB-C (female)

Protocol

USB 2.0, low speed

Control/Configuration program

Extron DSP Configurator Pro for Microsoft Windows 10/11^®

API

Extron Simple Instruction Set (SIS™)

Digital Logic Inputs

Digital I/O ports

(1) 6-pole, 3.5mm captive screw

Pin configuration

Pin-1 = Read, Pin-2 = Read, Pin-3 = Read, Pin-4 = Read, Pin-5 = +5 VDC @ <= 150mA, Pin-6 = GND

Programmable pullup resistor

3k ohm

Over-Current protection

Pin-5 voltage output provides over-current and short circuit protection which resets after power-cycling

General

External power supply

Part number

70-1175-01

Model

PS 1205 C

Input (AC)

100-240 VAC, 50-60 Hz 0.25 A

Output (DC)

12 VDC, 0.5 A, 6 Watts

Power input requirement

12 VDC / 0.46 A

Power consumption

Device

4.2 watts

Device and power supply

5.2 watts

Thermal dissipation

Device

13.0 BTU/hr

Device and power supply

16.6 BTU/hr

Cooling method

Passive, unventilated

Environmental

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)

Mounting options

Rack mount

Yes, with optional 1U rack shelf

Furniture mount

Yes, with optional mini under-desk mounting kit

Physical properties

Enclosure type

Metal

Enclosure dimensions

1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide)
(43 mm H x 109 mm W x 76 mm D)
(Depth excludes connectors and knobs)

Product weight

0.5 lbs (0.2 kg)

Regulatory compliance

Safety

CE, c-UL, UL

EMI/EMC

CE, C-Tick, FCC Class A, ICES, VCCI

Environmental

Complies with the appropriate requirements of RoHS, WEEE

Warranty

Device

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.

(6257-D2)

Shipping Dimensions and Weights
Part #	Height	Width	Depth	Weight
60-2048-01	2.0" (5.1 cm)	2.75" (7.0 cm)	10.25" (26.0 cm)	2.0 lbs (0.91 kg)

MVC 121 xi New

Audio DSP

Easy-to-Use DSP Configurator Pro Software

Flexible Mixer

Versatile Control Options

Features

Specifications

Diagram

Panel Drawing