Meyer MSL-4 Specifications

protection, or other problems
that can compromise a
system’s performance. All that
is required is to hookup AC
power and run a good quality
signal source into it. What
could be simpler?

The MSL-4 literally does all
the work. The power system
utilizes the Intelligent AC
system, which provides for
automatic voltage selection,
EMI filtering, soft current turn­on, surge suppression, and
dual circuit breakers. It can
even provide uninterrupted
operation under limited
brownout conditions.

The forced-air cooling
system directs air over the

The MSL-4 is an arrayable,
high-Q long-throw

reinforcement
loudspeaker. It operates with a
very flat frequency response all
the way from 18kHz down to
an impressive 65Hz. To get an
even lower range, the unit
works well with mid-bass
loudspeakers and subwoofers.

The MSL-4 is unique; it is
the first high-power, high­performance, self-contained
reinforcement speaker. By
integrating the controllers,
amplifiers, and speaker
components into one unit,
sound designers are no longer
required to waste time fussing
with different amplifier gains,
rack wiring, loudspeaker

FEATURES

heatsink, not the electronics.
This allows fewer contaminants
into the amplifier, increasing
its reliability.

The MSL-4 is highly
arrayable, with a very precise
coverage pattern: 40°
horizontal by 35° vertical. The
unit can be tight-packed to get
high power over long
distances, or splayed to
increase the horizontal
coverage.

Self-Powered Reinforcement Loudspeaker

MSL-4

Integrated control
electronics and amplifiers

TruPower

™

Limiting (TPL)

Intelligent AC

™

System

Compatible with the
Remote Monitoring
System

™

(RMS)

Long-throw

High-Q

Ultra-low distortion

Meyer
Sound

Superior
engineering
for the art
and science
of sound.

PATENTED

Acoustical

each loudspeaker)

Coverage

Crossover

Transducers

Audio Input

Amplifiers

AC Power

Physical

Notes:

PHYSICAL DIMENSIONS

MSL-4 SPECIFICATIONS

Frequency Response

Phase Response

Maximum SPL

Dynamic Range

(-6 dB points)

Low Frequency

High Frequency

Type

Connector

Nominal Input Level

Type

Burst capability

2

THD, IM, TIM

Connector

Automatic voltage selection

Operational voltage range

Max.Continuous RMS Current (>10 sec)

Burst RMS Current (<1 sec)

Max Peak Current During Burst

Soft Current Turn-on

Dimensions

Weight

Enclosure

Finish

Protective Grill

Rigging

±4 dB from 65 Hz to 18 kHz

-6 dB at 60 Hz and 20 kHz
±30° from 450 Hz to 10 kHz
140 dB@1 meter
>110 dB

40° H ; 35° V

800 Hz

12" diameter MS-12 cone (3" voice coil)
2" throat (4" diaphragm) MS-2001A compression driver

10kΩ impedance, electronically balanced
XLR (A-3) male and female
+4 dBu

Complementary power MOSFET output stages (audio class AB/H)
1240 watts (620 watts/channel)
< .02 %

250V NEMA L6-20P (twistlock) inlet or IEC 309 male inlet

3

95-125 VAC and 208-235 VAC; 50/60 Hz

4

Turn on: 85 VAC; Turn off: 134 VAC; 50/60 Hz
Turn on: 165 VAC; Turn off: 264 VAC; 50/60 Hz
@115 V: 8A @230V: 4A @100V: 10A
@115 V: 15A @230V: 8A @100V: 18A
@115 V: 22Apk @230V: 11Apk @100V: 25Apk
Inrush current <12A@115V

21 1⁄4" W x 36" H x 30" D
180 lbs (82 kg)/Shipping: 213 lbs. (97kg)
Multi-ply hardwood
Black textured
Hex perforated metal screen, foam covering
Aircraft pan fittings, three on both top and bottom. Working load for
each fitting is 600 lbs, which is 1⁄5 the cabinet breaking strength
(with straight tensile pull).

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1. Subject to half space loading, measured with one-third octave frequency resolution in

fixed ISO bands.

2. Nominal 8Ω resistive load, pink noise, 100V peak.

3. Other connectors available. For European installations, an IEC 309 connector

(16A) can be installed.

4. The unit is rated at 88-125V and 182-235V, 50/60 Hz, to satisfy EC standards

for -10% to 6% AC line voltage.

ALL UNITS IN INCHES

Rear Panel Locations
(U.S. Version)

1

1

1

Meyer Sound Laboratories, Inc.

2832 San Pablo Avenue
Berkeley, CA 94702
tel: [phone]
fax: [phone]
e-mail: [e-mail]
http: www.meyersound.com

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LL

CC

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®®

LISTED

3K59

COMMERCIAL

AUDIO SYSTEM

MSL-4 - 04.031.009.01B

Meyer Sound Laboratories

has devoted itself to

designing, manufacturing,

and refining components

that deliver superb sonic

reproduction. Every part of

every component is

designed and built to

exacting specifications

and undergoes rigorous,

comprehensive testing

in the laboratories.

Research remains an

integral, driving force

behind all production.

Meyer strives for sound

quality that is predictable

and neutral over an

extended lifetime and

across an extended range.

Made by Meyer Sound, Berkeley, CA, USA

European Office:

Meyer Sound Germany
GmbH
Carl Zeiss Strasse 13
56751 Polch, Germany

© 1997 Meyer Sound Laboratories, Inc.

All rights reserved