Meyer Sound JM-1P-RMS-WP, JM-1P-WP, JM-1P-VEAM-WP, JM-1P-VEAM-RMS-WP, JM-1P-VEAM-RMS User Manual

DATASHEET JM SERIES

36.08

[916 mm]

16.79

[427 mm]

20°

7.32

[186 mm]

28.00

29.30

[744 mm]

13.04

[331 mm]

18.04

[458 mm]

JM-1P : Arrayable Loudspeaker

The JM-1P self-powered loudspeaker is a high-Q, arrayable
loudspeaker suited for a wide range of applications.
Utilizing Meyer Sound's patented REM™ technology and
trapezoidal cabinet design, the JM-1P can be deployed
in tightly-packed array clusters to deliver coverage that
is proportional to the number of units in the array.
While JM-1P point source arrays are optimized for
horizontal installations, they can also be used vertically
when necessary. With its scalable coverage and versatile
QuickFly® rigging options, the JM-1P loudspeaker can be
used for touring, rental, and fixed installations.

Boasting a wide operating frequency range of 53 Hz
to 18 kHz, the JM-1P delivers a remarkably smooth
sound with ample low-frequency headroom. Designed
and manufactured at Meyer Sound headquarters in
Berkeley, California, the JM-1P's drivers include one low­frequency 15-inch long excursion cone driver, and one
high-frequency 4-inch compression driver with an REM
manifold coupled to an extremely accurate horn. The JM-1P
is distinguished by its constant-Q horn that provides a
20-degree horizontal by 60-degree vertical coverage. The
unit's consistent polar response and trapezoidal enclosure
allow for tightly packed arrays with minimal overlap in
high frequencies.

Dimensions 16.79" w x 36.08" h x 29.30" d

(427 mm x 916 mm x 744 mm)
Weight 147 lbs (66.68 kg)
Enclosure Multi-ply hardwood
Finish Black textured
Protective Grille Hex-stamped steel with black mesh screen
Rigging Aluminum end plates with side links for arraying units;

threaded metric M10 points for rigging accessories; optional

pickup plate and vertical grid for suspending arrays with

uptilt or downtilt

The JM-1P's sophisticated onboard amplification and
processing produces consistent and predictable results
in any system design. A proprietary two-channel, class
AB/H power amplifier with complementary MOSFET output
stages yields a total power output of 1275 W (2550 W peak).
Built-in signal processing includes an electronic crossover,
driver protection, and correction filters for achieving flat
phase and frequency responses. Each amplifier channel has
peak and rms limiters that prevent driver overexcursion
and regulate voice coil temperatures. Limiting activity is
easily monitored with the rear panel limit LEDs.

The optional RMS™ remote monitoring system provides
comprehensive monitoring of system parameters on a
Windows®-based computer.

The JM-1P's end plates include captive GuideALinks™ and
quick-release pins that allow the unit to be easily linked to
other JM-1Ps in arrays. The optional MPA-JM1 pickup plate
suspends JM-1P horizontal arrays of up to four units with
uptilt or downtilt from a single hanging point; two pickup
plates can suspend arrays of up to six units from a single
hanging point or motor using the MTGSB-4B spreader bar.
For additional flexibility, the optional MTG-JM1 vertical
grid suspends vertical arrays of up to six units.

Constructed of premium birch plywood, the durable JM-1P
enclosure is coated with a black-textured, hard-shell finish.
A hex-stamped, steel grille with acoustical black mesh
protects the unit's drivers. Other options include weather
protection and custom color finishes for fixed installations
and applications with specific cosmetic requirements. The
optional MDB-JM1 dolly board transports the JM-1P safely
and securely; multiple dolly boards can be interlocked to
transport up to three linked JM-1Ps.

JM-1P horizontal array (six units) with two

MPA-JM1 pickup plates suspended from a single

point using the MTGSB-4B spreader bar

Features & Benefits

Tightly controlled coverage yields scalable
coverage proportional to the number of
arrayed units

Exceptional size to power ratio

QuickFly rigging offers the flexibility of
both horizontal and vertical arrays

Consistent and predictable array
performance ensures accurate system
design

Applications

Theatrical sound reinforcement

Houses of worship

Portable and installed AV systems

Centerfill and sidefill in large-scale systems

Theme parks, stadiums, concert halls, and
nightclubs

JM-1P Specifications

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Acoustical

Operating Frequency Range

Frequency Response

Phase Response

Maximum Peak SPL

Coverage

Crossover

4

Dynamic Range

Transducers

Low Frequency

High Frequency

Audio Input

Maximum Common Mode Range

Input Impedance

Nominal Input Sensitivity

Amplifier

Output Power

AC Power

Safety Agency Rated Operating Range

Turn-on and Turn-off Points

Maximum Long-Term Continuous Current (>10 sec)

Current Draw: Idle Current

Ultimate Short-Term Peak Current Draw

RMS Network (optional)

Voltage Selection

Burst Current (<1 sec)

Inrush Current

Type

Connectors

Wiring

DC Blocking

CMRR

RF Filter

TIM Filter

Input Level

Type

Total Output

THD, IM, TIM

Load

Cooling

Connector

1

53 Hz – 18 kHz

2

56 Hz – 16.5 kHz ±4 dB
580 Hz – 16 kHz ±45°

3

138 dB
>110 dB

20° horizontal x 60° vertical

520 Hz

High-power 15" cone driver with neodymium magnet

Nominal impedance: 2 Ω

Voice coil size: 4"
Power handling capability: 1200 W (AES)
4" compression driver

Nominal impedance: 8 Ω

Voice coil size: 4"
Diaphragm size: 4"
Exit size: 1.5"
Power handling capability: 250 W (AES)

Differential, electronically balanced
±15 V DC, clamped to earth for voltage transient protection

Female XLR input with male XLR loop output or VEAM all-in-one
connector (integrates AC, audio, and network)

10 kΩ differential between pins 2 and 3
Pin 1: Chassis/earth through 220 kΩ, 1000 pF, 15 V clamp network to

provide virtual ground lift at audio frequencies
Pin 2: Signal +
Pin 3: Signal –
Case: Earth ground and chassis
Differential DC blocking up to the maximum common mode voltage
>50 dB, typically 80 dB (50 Hz – 500 Hz)
Common mode: 425 kHz; Differential mode: 142 kHz
Integral to signal processing (<80 kHz)
0 dBV (1.0 V rms, 1.4 V peak) continuous is typically the onset of
limiting for noise and music
Audio source must be capable of producing +20 dBV (10 V rms,

14 V peak) into 600 Ω in order to produce maximum peak SPL over the

operating bandwidth of the loudspeaker

Two-channel complementary MOSFET output stages (class AB/H)

6

1275 W (1 x 1000 W, 1 x 275 W)

7

2550 W peak
<.02%

2 Ω low channel; 8 Ω high channel

8

QuietCool™ with convection cooling at low to mid audio levels; fan­assisted only at high audio levels

PowerCon® with loop output or VEAM
Automatic, two ranges, each with high-low voltage tap (uninterrupted)
95–125 V AC; 208–235 V AC, 50/60 Hz
85–134 V AC; 165–264 V AC

0.50 A rms (115 V AC); 0.28 A rms (230 V AC); 0.56 A rms (100 V AC)

4.55 A rms (115 V AC); 2.50 A rms (230 V AC); 5.25 A rms (100 V AC)

9

8.0 A rms (115 V AC); 4.1 A rms (230 V AC); 9.2 A rms (100 V AC)

20.8 A peak (115 V AC); 13.0 A peak (230 V AC); 21.6 A peak (100 V AC)

7.1 A peak (115 V AC); 8.4 A peak (230 V AC); 7.1 A peak (100 V AC)

Equipped with two-conductor twisted-pair network, reporting
all operating parameters of amplifiers to system operator’s host
computer

5

5

Notes:

1. Recommended maximum operating
frequency range. Response depends
on loading conditions and room
acoustics.

2. Free field measured with 1/3-octave
frequency resolution at 4 meters.

3. Measured with music, free field,
referred to 1 meter.

4. At this frequency, the transducers
produce equal sound pressure levels.

5. Power handling is measured under
AES standard conditions: transducers
driven continuously for two hours
with a band limited noise signal
having a 6 dB peak-average ratio.

6. Amplifier wattage rating based on
the maximum unclipped burst sine­wave rms voltage the amplifier will
produce for at least 0.5 seconds into
the nominal load impedance.

7. Peak power based on the maximum
unclipped peak voltage the
amplifier will produce for at least
100 milliseconds into the nominal
load impedance.

8. Fan controlled by audio level,
remaining off at turn-on and at low
to mid audio levels and operating
only at high audio levels, making it
virtually inaudible.

9. AC power cabling must be of
sufficient gauge so that under
burst current rms conditions, cable
transmission losses do not cause the
voltage to drop below the specified
operating range at the loudspeaker.

JM-1P — 04.202.004.02 A

Copyright © 2009
Meyer Sound Laboratories Inc.
All rights reserved

meyer sound laboratories inc.

2832 San Pablo Avenue
Berkeley, CA 94702

T: +1 510 486.1166
F: +1 510 486.8356

[e-mail]
www.meyersound.com

Architect Specifications

The loudspeaker shall be a self-powered, full-range system;
the transducers shall consist of a 15-inch diameter cone driver
and a 4-inch diaphragm compression driver on a 20-degree
horizontal by 60-degree vertical horn. The loudspeaker system
shall incorporate internal processing electronics and a two­channel amplifier, one channel for each driver. Processing
functions shall include equalization, phase correction, signal
division, and protection for the high- and low-frequency
sections. The crossover point shall be 520 Hz.

Each amplifier channel shall be class AB/H with complementary
MOSFET output stages. Burst capability for the low-frequency
channel shall be 1000 watts total with nominal 2-ohm resistive
load and 275 watts for the high-frequency channel with nominal
8-ohm resistive load. Peak power shall be 2550 watts. Distortion
(THD, IM, TIM) shall not exceed 0.02%.

Performance specifications for a typical production unit shall
be as follows, measured at 1/3-octave resolution: operating

frequency range shall be 53 Hz to 18 kHz; phase response shall
be ±45° from 580 Hz to 16 kHz; maximum peak SPL shall be
138 dB at 1 meter, free field.

The audio input shall be electronically balanced with a 10 kOhm
impedance and accept a nominal 0 dBV (1.0 V rms, 1.4 V peak)
signal. Connector shall be XLR (A-3) type female with parallel
looping male or VEAM all-in-one multipin connector. RF filtering
shall be provided, and CMRR shall be greater than 80 dB from
50 Hz to 500 Hz.

The internal power supply shall perform automatic voltage
selection, EMI filtering, soft current turn-on, and surge
suppression. Power requirements shall be nominal 100, 110, or
230 V AC line at 50 or 60 Hz. UL and CE operating voltage range
shall be 100 to 240 V AC. Maximum peak current draw during
burst shall be 8.0 A at 115 V AC, 4.1 A at 230 V AC, and 9.2 A at
100 V AC. Current inrush during soft turn-on shall not exceed

7.1 A at 115 V AC, 8.4 A at 230 V AC, and 7.1 A at 100 V AC. AC

power connectors shall be either a PowerCon with loop output
or VEAM all-in-one multipin connector.

The loudspeaker system shall provide facilities for installing
Meyer Sound’s optional RMS remote monitoring system.

All components shall be mounted in an acoustically vented
trapezoidal enclosure constructed of multi-ply hardwood with
a black textured, hard-shell finish. The enclosure shall include
end plates with GuideALinks for linking units in horizontal and
vertical arrays; threaded metric M10 points accommodate Meyer
Sound proprietary rigging hardware. The front protective grille
shall be powder-coated, hex-stamped steel with black mesh
screen.

Dimensions shall be 16.79" wide x 36.08" high x 29.30" deep
(427 mm x 916 mm x 744 mm). Weight shall be 147 lbs (66.68 kg).

The loudspeaker shall be the Meyer Sound JM-1P.