MLS 304MA Retired

Four Input Switcher with Mono Audio Amplifier

Key Features

Controllable via TouchLink^® Control System, MediaLink^® Controller, front panel buttons, or RS-232
Integrated mono audio amplifier provides 20 watts, rms, into 4 or 8 ohm speakers or 16 watts, rms, for 70/100 volt, distributed audio systems
Triple-Action Switching™ for RGB delay
Front panel security lockout

Model	Version Description	Part #
MLS 304MA	Mono Audio Amplifier	60-550-01	Retired

This product has been retired.

The Extron MLS 304MA is a simple-to-use, four input, multi-format switcher with an integrated mono amplifier. It provides computer video and composite video switching, along with stereo audio input switching. The switcher features mono 70/100 volt amplification for distributed audio applications. An additional input accepts balanced/unbalanced mono line level audio signals for mixing with any of the four switchable inputs. For enhanced operation, ease of room control, and simplified system integration, the MLS 304MA can be controlled with a TouchLink^® Control System or MediaLink^® Controller.

The MLS 304MA switcher features two configurable 15-pin HD inputs to support high resolution RGBHV or composite video sources and 15-pin HD local monitor loop-through. There are two additional dedicated inputs for composite video signals, and all inputs support stereo audio. A line level mono audio auxiliary/mix input is available for consumer and professional audio sources such as a wireless microphone receiver for mixing with the selected input. The MLS 304MA also features audio input gain and attenuation for each input, plus loudness control and master volume control on the front panel or via RS-232.

In addition to the 20-watt, rms, integrated mono amplifier for 4 or 8 ohm or 16 watts, rms, for 70/100 volt distributed audio systems the MLS 304MA includes two preamp balanced or unbalanced audio outputs, one fixed and one variable. All outputs can be configured via RS-232 for mono or stereo audio output.

Features

Video inputs: Two female RCA connectors for composite video; two female 15-pin HD connectors for computer video or composite video

Audio inputs: Two pairs of female RCA connectors and two female 3.5 mm stereo mini jacks

Video outputs: Dual RGB output on five female BNC connectors and one female 15-pin HD connector, and composite on one female BNC connector

Audio outputs: Captive screw connectors and insulated screw terminals

Controllable via TouchLink^® Control System, MediaLink^® Controller, front panel buttons, or RS-232 — The switchers can be controlled using the front panel backlit buttons or RS-232. An optional TouchLink Touchpanel Control System or MediaLink Controller may be connected to the RS-232 port to provide a simple and intuitive user interface for the MLS Switchers, and the entire room.

Local monitor output — 15-pin HD connector functions as additional RGB output or local monitor output to enable preview monitor capability without the need for a distribution amplifier.

Audio input gain and attenuation — Gain or attenuation can be adjusted for each input to eliminate noticeable differences when switching between sources.

Fixed and variable preamp line level audio outputs — Can be set for mono or stereo via RS-232.

Integrated mono audio amplifier provides 20 watts, rms, into 4 or 8 ohm speakers or 16 watts, rms, for 70/100 volt, distributed audio systems — Outputs amplified mono audio on insulated screw terminals.

Additional input accepts balanced/unbalanced mono line level audio signals for mixing with any of the four switchable inputs

Loudness control — Boosts low and high frequencies to compensate for the normal decreased hearing ability of the human ear at low volume levels.

Triple-Action Switching™ for RGB delay — Blanks the screen during switching of RGB signals to eliminate visible switching transitions.

Front panel security lockout — Allows security lockout of front panel setup and adjustment options.

Rack-mountable, 1U, full rack width metal enclosure

Highly reliable, energy-efficient internal universal power supply — The 100-240 VAC, 50/60 Hz, international power supply provides worldwide power compatibility with high demonstrated reliability.

INCLUDED ACCESSORIES
	MBD 149	1U, Full Rack Width, Rack Mount and Through-Desk Kit for Four-Piece Enclosure	70-077-03

INCLUDED ACCESSORIES

MBD 149

1U, Full Rack Width, Rack Mount and Through-Desk Kit for Four-Piece Enclosure

70-077-03

OPTIONAL ACCESSORIES
	MLC 226 IP	Enhanced MediaLink Controller with Ethernet Control
	VGA-A M-M MD	Male to Male VGA and Audio Cables - Molded Connectors
	SYM BNCM	15-pin HD Male to BNC Male Mini High Resolution Cables
	SYM BNCF	15-pin HD Male to BNC Female Mini High Resolution Cables

OPTIONAL ACCESSORIES

MLC 226 IP

Enhanced MediaLink Controller with Ethernet Control

VGA-A M-M MD

Male to Male VGA and Audio Cables - Molded Connectors

SYM BNCM

15-pin HD Male to BNC Male Mini High Resolution Cables

SYM BNCF

15-pin HD Male to BNC Female Mini High Resolution Cables

SIMILAR PRODUCTS
	MLS 100 A	Four Input Stereo Audio Switcher

SIMILAR PRODUCTS

MLS 100 A

Four Input Stereo Audio Switcher

Specifications

MLS 304 Series

Video

Gain

Unity

Bandwidth

280 MHz (-3 dB)

Differential phase error

1.0° at 3.58 MHz and 4.43 MHz

Differential gain error

1.0% at 3.58 MHz and 4.43 MHz

Crosstalk

-68 dB @ 10 MHz, -39 dB @ 100MHz

Switching speed

5 ms (max.)

Video input and loop through

Number/signal type

2 RGBHV, RGBS, RGsB, RsGsBs
1 RGBHV, RGBS, RGsB, RsGsBs local monitor loop-through
2 composite video

Connectors

2 female 15-pin HD (RGB), 1 female 15-pin HD (RGB loop-through)
2 female RCA (composite video)

Nominal level

1 Vp-p for Y of S-video, and for composite video
0.7 Vp-p for RGB

Minimum/maximum levels

RGB

Analog: 0.3 V to 1.5 Vp-p with no offset

S-video, composite video

Analog: 0.4 V to 2.0 Vp-p with no offset

Impedance

75 ohms

Horizontal frequency

15 kHz to 145 kHz

Vertical frequency

30 Hz to 170 Hz

Return loss

RGB

<-40 dB @ 5 MHz

S-video

<-25 dB, 0 to 10 MHz

Composite video

<-40 dB, 0 to 10 MHz

DC offset (max. allowable)

1.5 V

Video output

Number/signal type

1 RGBHV, RGBS, RGsB, RsGsBs (follows input)
1 composite video

Connectors

5 female BNC (RGB)
1 female BNC (composite)

Nominal level

1 Vp-p for Y of S-video, and for composite video
0.7 Vp-p for RGB

Minimum/maximum levels

RGB

Analog: 0.3 V to 1.5 Vp-p (follows input)

Composite video

Analog: 0.4 V to 2.0 Vp-p (follows input)

Impedance

75 ohms

Return loss

<-40 dB @ 5 MHz

DC offset

±5 mV with input at 0 offset

Switching type

Triple-Action (RGB delay)

Sync

Input type

RGBHV, RGBS, RGsB, RsGsBs

Output type

RGBHV, RGBS, RGsB, RsGsBs (follows input)

Standards

NTSC 3.58, NTSC 4.43, PAL, SECAM

Input level

2.0 V to 5.0 Vp-p

Output level

TTL: 5.0 Vp-p, unterminated

Input impedance

10k ohms

Output impedance

75 ohms

Max. input voltage

5.0 Vp-p

Max. propagation delay

30 ns

Max. rise/fall time

4.0 ns

Polarity

Positive or negative (follows input)

Audio

Gain

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

Frequency response at 1 watt output

Preamp/Lineout

20 Hz to 20 kHz, ±0.5 dB

Direct (4/8 ohm)

20 Hz to 20 kHz, ±1.0 dB

Transformer (70 V or 100 V mono amplifier)

50 Hz to 20 kHz, +0 dB/-3 dB

THD + Noise

Power amp (mono or stereo)

0.037% @ 1 kHz at nominal level (1 watt, 8 ohm load)

Preamp

0.11% @ 1 kHz at nominal level

Lineout

0.018% @ 1 kHz at nominal level

S/N at maximum power output (unweighted)

Power amp

>75 dB @ 10 Hz to 22 kHz

Preamp

>80 dB @ 10 Hz to 22 kHz

Lineout

>80 dB @ 10 Hz to 22 kHz

Crosstalk

Power amp

<-75 dB @ 1 kHz, fully loaded

Preamp

<-75 dB @ 1 kHz, fully loaded

Lineout

<-80 dB @ 1 kHz, fully loaded

Stereo channel separation

>80 dB @ 1 kHz

CMRR

>85 dB @ 20 Hz to 200 Hz, >75 dB @ 20 Hz to 20 kHz

Bass

±10 dB @ 100 Hz

Treble

±10 dB @ 10 kHz

Loudness (contour)

+6 dB @ 100 Hz to 10 kHz

Audio input

Number/signal type

4 stereo, unbalanced
1 Aux/Mix balanced/unbalanced mono (nonswitchable)

Connectors

2 pairs of female RCA connectors (inputs 1-2)
2 female 3.5 mm mini stereo jacks (unbalanced only) (inputs 3-4);
tip (L), ring (R), sleeve (GND)
(1) 3.5 mm captive screw connector, 3 pole (Aux/Mix input)

Impedance

Aux/Mix input

>18k ohms unbalanced, DC coupled

All other inputs

>10k ohms unbalanced, DC coupled

Nominal level

-10 dBV (316 mVrms)

Input gain adjustment

-42 dB to +24 dB, adjustable per input

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

Audio output — Lineout and Preamp

Number/signal type

2 (1 Lineout/fixed and 1 Preamp/variable) stereo/mono, balanced/unbalanced

Connectors

(2) 3.5 mm captive screw connectors, 5 pole

Impedance

50 ohms unbalanced, 100 ohms balanced

Gain error

±0.8 dB channel to channel

Nominal level

Configurable: -10 dBV (316 mVrms, default), +4 dBu (1.23 Vrms)

Maximum level (600 ohm)

Preamp

>+19 dBu, balanced <0.1% THD+N

Lineout

>+16 dBu, balanced <0.1% THD+N

NOTE	Unbalanced wired outputs produce 6 dB of attenuation. Balanced outputs have unity gain/attenuation.

Audio output — mono power amp (MLS 304MA only)

Number/signal type

(1) mono

Connector

(1) 5-position screw terminal

Sensitivity

-20 dBV (-17.8 dBu; 100 mVrms) (adjustable) for maximum power output

Power bandwidth

Direct (4 ohm)

1 kHz at 4 ohms

Direct (8 ohm)

20 Hz to 20 kHz, 0.15% THD

Transformer (70 V)

50 Hz to 20 kHz, 1% THD

Transformer (100 V)

50 Hz to 20 kHz, 0.5% THD

Maximum power output

Direct (4/8 ohm)

20 watts max. (continuous)

Transformer (70/100 V)

16 watts max. (continuous), transformer coupled

Protection

Input limiting, thermal, short circuit

Audio output — stereo power amp (MLS 304SA only)

Number/signal type

(1) stereo (default) or dual mono (configured via software)

Connector

(1) 5-position screw terminal

Sensitivity

-20 dBV (-17.8 dBu; 100 mVrms) (adjustable) for maximum power output

Power bandwidth

Direct (4 ohm)

1 kHz at 4 ohms

Direct (8 ohm)

20 Hz to 20 kHz, 0.8% THD

Maximum power output

Direct (4 ohm)

24 watts max. (continuous), 12 watts (rms) per channel

Direct (8 ohm)

16 watts max. (continuous), 8 watts (rms) per channel

Protection

Input limiting, thermal, short circuit

Control/remote — switcher

Serial control port

RS-232, 3.5 mm captive screw connector, 5 pole (uses 3 poles)

Baud rate and protocol

9600, 8-bit, 1 stop bit, no parity

Serial control pin configuration

1 = Tx, 2 = Rx, 4 = GND

Program control

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

General

Power

Internal
Input: 100-240 VAC, 50-60 Hz, 48 watt power supply

Ambient temperature/humidity

Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +32 to +113 °F (0 to +45 °C) / 10% to 90%, noncondensing

Cooling

Convection, no vents

Mounting

Rack mount

Yes, with included brackets

Enclosure type

Metal

Enclosure dimensions

1.75" H x 17.5" W x 8.5" D (1U high, full rack wide)
4.4 cm H x 44.4 cm W x 21.6 cm D
(Depth excludes connectors and knob. Width excludes rack ears.)

Product weight

6.0 lbs (2.7 kg)

Shipping weight

11 lbs (5 kg)

Vibration

ISTA 1A in carton (International Safe Transit Association)

Regulatory compliance

Safety

CE, c-UL, UL

EMI/EMC

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

Product warranty

3 years parts and labor

NOTE	All nominal levels are at ±10%.

NOTE	Specifications are subject to change without notice.

(8.0-041311-D11)

MLS 304MA Retired

Features

Specifications

Diagram

Panel Drawing