Meyer Sound 750-LFC-3, 750-LFC-3-RIGGING, 750-LFC-RMS-3, 750-LFC-RMS-5, 750-LFC-RMS-5-RIG Data Sheet

DATASHEET LF

750-LFC Compact Low-Frequency Control Element

21.55 in

[547 mm]

18.55 in

[471 mm]

20.43 in

[519 mm]

20.88 in

[530 mm]

10.90 in

[277 mm]

1 1/2 [ 38 mm] U.S.
1 3/8 [

35 mm] E.U.

M20 thread at the bottom

(Shown with optional QuickFly® rigging) (Dimensions shown for Rigging version)

Meyer Sound’s 750-LFC compact low-frequency control element
reproduces low frequencies at high, continuous output levels

monitoring of system parameters from a Mac

computer.
with extremely low distortion. The 750-LFC offers the same sonic
linearity as Meyer Sound’s 900-LFC low-frequency control element
in a smaller, lighter cabinet, making it ideal for building scalable
systems to suit portable applications or fixed installations of any
size.

The 750-LFC is available with or without Meyer Sound’s

QuickFly

®

 rigging. When equipped with the optional
MRK-750 rigging kit, the 750-LFC’s captive GuideALinks
it to be flown from the MG-MINA/LINA multipurpose grid in
LINA arrays without any transition frame between the 750-LFC

A newly-designed class D amplifier affords unprecedented

and LINA.

efficiency to the 750-LFC, significantly lowering distortion while
reducing power consumption and operating temperature. A single,
field-replaceable module contains the on board amplifier and
control circuitry.

Fly 750-LFCs separately as a subwoofer array with variable splay
angles of 0°, 1.5°, 3.25°, or 4.75°, or configure the 750-LFC in
cardioid arrays to reduce output behind the loudspeakers.

9.88 in

[251 mm]

®

or Windows®-based

0.25 in

[6 mm]

™

allow

In addition to pairing with LINA

™

systems, the 750-LFC integrates
easily with other Meyer Sound loudspeaker systems, including the
LEOPARD

Meyer Sound’s Galileo

™

and ULTRA Series loudspeakers.

®

GALAXY Network Platforms, which provide
matrix routing, alignment, and processing for array components,
can drive LINA and 750-LFC loudspeakers. To guarantee optimum
performance, use Meyer Sound’s MAPP™ System Design Tool to
design systems with the 750-LFC.

LINA and 750-LFC loudspeakers work with Meyer Sound’s

™

RMS

remote monitoring system, which provides comprehensive

Ground stack arrays without a transition frame between the
750-LFC and LINA by equipping the 750-LFC with the optional
MRK-750 rigging kit. Create a wider base for ground-stacks with
the optional MG-MINA/LINA grid.

The optional MCF-750 caster frame and protective covers allow
for the transportation of both versions of the 750-LFC in stacks.

The 750-LFC integral pole mount supports easy placement of
one or two LINAs on top using the available MUB-MINA/LINA
UBracket or the MYA-MINA/LINA yoke. Alternatively, use the pole
mount to pair the 750-LFC with ULTRA Series loudspeakers.

FEATURES AND BENEFITS

• Compact cabinet with small footprint and extraordinary power-to-size ratio

• High peak power output with extremely low distortion

• Exceptional linearity, transient reproduction, and low-frequency clarity

• Self-powered design for simplified setup and increased reliability

• Stackable and flyable in regular and cardioid arrays with splay options

• Integral pole-mount receptacle to facilitate pairing with LINA or ULTRA Series loudspeakers

APPLICATIONS

• Scalable low-frequency control for touring or corporate applications, or fixed installations

• Clubs, theaters, houses of worship, corporate AV, and theme parks

• Low-frequency complement for LINA, LEOPARD and ULTRA systems

ACCESSORIES AND ASSOCIATED PRODUCTS

MCF 750 Caster Frame: Heavy duty caster frame for safely transporting up to three 750-LFC cabinets. Available in two versions for cabinets fitted/not

fitted with MRK-750 rigging. Durable nylon covers for stacks of two and three units are also available to ensure the 750-LFC is completely road ready.

PBF-LINA Pull Back Frame: Attaches to the bottom cabinet of LINA and 750-LFC arrays and provides pull-back for extreme array downtilt.

MPK-POLE: Allows mounting of Meyer Sound loudspeakers on top of the 750-LFC using the heavy-duty integral pole mount. Constructed from steel

and available in two models:

MPK-POLE 35—adjustable: (32–55 in long) 35 mm pole; includes a 38 mm adapter

MPK-POLE 35MM/M20—fixed: (47 in long) 35 mm pole with M20 slug on one end; ideal pole for the EU version.

MG-MINA/LINA/750-LFC Multipurpose Grid: Supports arrays of 750-LFCs or mixed arrays of 750-LFCs and LINAs without transition hardware;

accommodates a variety of pickup configurations with four corner and 11 center pickup points (includes the two rear links from the GLK-750-LFC Grid
Link Upgrade Kit); can also use for ground stacking. Always use MAPP to verify rigging load ratings.

Galileo GALAXY Network Platform: The Galileo GALAXY Network Platform provides state-of-the-art loudspeaker management control technology
for loudspeaker systems with multiple zones. With immaculate sonic performance, it provides a powerful tool set for corrective room equalization and
creative fine-tuning for a full range of applications. In addition, GALAXY devices’ improved Delay Integration allows the user to combine LINA and
750-LFC with different Meyer Sound loudspeakers.

MDM-832 Distribution Module: MDM-832 units conveniently power LINA/750-LFC array systems, routing up to eight channels of AC power,
balanced audio and RMS signals to the loudspeakers. For bigger systems, the MDM-5000 Distribution Module is also available.

GLK-750-LFC Grid Link Upgrade Kit: Includes the two rear links and installation hardware. Using the rear links instead of the middle links on the
MG-MINA/LINA grid effectively increases the load rating for the grid when attached to 750-LFCs.

MCF 750 Caster Frame—Rigging MCF 750 Caster Frame—No

MPK Pole MG-MINA/LINA Multipurpose

Grid (with GLK-750-LFC grid link
upgrade kit)

Rigging

PBF-LINA Pull Back Frame

GALAXY Network Platform MDM-832 Distribution Module

SPECIFICATIONS

ACOUSTICAL

1

COVERAGE

TRANSDUCERS

AUDIO INPUT

Operating Frequency Range235 Hz – 125 Hz

Frequency Response

3

37 Hz – 110 Hz ±4 dB

Phase Response 43 Hz – 110 Hz ±30°

Linear Peak SPL

4

130.5 dB with crest factor >9 dB (M-noise), 130.5 dB (pink noise), 132 dB (B-noise)

360° (single unit); varies with number of units and configuration

Low Frequency One 15-inch, dual-coil, long-excursion cone driver; 2 Ω nominal impedance

Type Differential, electronically balanced

Maximum Common Mode Range ±15 V DC, clamped to earth for voltage transient protection

Connectors

XLR 3-pin female with male loop. Optional 5-pin connectors to accommodate both balanced audio
and RMS signals

Input Impedance 10 kΩ differential between pins 2 and 3

Pin 1: Chassis/earth through 1 kΩ, 1000 pF, 15 V clamped network to provide virtual ground lift at
audio frequencies

Pin 2: Signal (+)

5

Wiring

Pin 3: Signal (–)

Pin 4: RMS

Pin 5: RMS

Case: Earth ground and chassis

AMPLIFIER

AC POWER

CURRENT DRAW

Nominal Input Sensitivity 6.0 dBV (2.0 V rms) continuous is typically the onset of limiting for noise and music

Input Level

Audio source must be capable of producing +20 dBV (10 V rms) into

600 Ω to produce the maximum peak SPL over the operating bandwidth of the loudspeaker

Type 2-channel, open-loop, class D

Total Output Power

6

3100 W peak

THD, IM, TIM < 0.02%

Cooling Convection

Connectors powerCON 20 input with loop output

Automatic Voltage

Selection 90–265 V AC; 50–60 Hz

Safety Agency Rated Voltage Range 100–240 V AC, 50–60 Hz

Turn-on and Turn-off points Turn-on: 90 V AC; Turn-off: none; internal fuse protection above 265 V AC

Idle 0.39 A rms (115 V AC), 0.38 A rms (230 V AC), 0.42 A rms (100 V AC)

Maximum Long-Term Continuous 5.3 A rms (115 V AC), 2.7 A rms (230 V AC), 6.2 A rms (100 V AC)

Burst (<1 sec)

7

9.2 A rms (115 V AC), 4.4 A rms (230 V AC), 10.7 A rms (100 V AC)

Maximum Instantaneous Peak 15.3 A peak (115 V AC), 7.8 A peak (230 V AC), 18 A peak (100 V AC)

RMS NETWORK (OPTIONAL)

Inrush Current < 20.0 A peak

Two-conductor, twisted-pair network, capable of reporting all operating parameters of amplifiers to
system operator’s host computer.

SPECIFICATIONS, CONT’D.

PHYSICAL

Dimensions without Rigging W: 21.80 in (554 mm) x H: 20.30 in (515 mm) x D: 20.88 in (530 mm)

Dimensions with Rigging W: 21.55 in (547 mm) x H: 20.43 in (519 mm) x D: 20.88 in (530 mm)

Weight without Rigging 89 lbs (40.3 kg)

Weight with Rigging 105 lbs (47.6 kg)

Enclosure Premium multi-ply birch with slightly textured black finish

Protective Grille Powder-coated, hex-stamped steel with acoustical black mesh

Optional MRK-750 rigging kit with end frames and captive GuideALinks secured

Rigging

Pole Mount

with 0.25 in x 0.53 in quick release pins that allow 0°, 1.5°, 3.25°, or 4.75° splay
angles; detachable side handles. Rigging allows ground-stacked, flown, and
cardioid configurations

U.S. version: 1.5 in (38 mm)

E.U. version: 1.375 in (35 mm and M20 thread at the bottom)

NOTES

1. Loudspeaker system predictions for coverage and SPL are available in Meyer Sound's MAPP System Design Tool.

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

3. Measured in half-space with pink noise at 4 m, 1/3-octave frequency resolution.

4. Linear Peak SPL is measured in half-space at 4 m referred to 1 m. Loudspeaker SPL compression measured with M-noise at the onset of
limiting, 2-hour duration, and 50-degree C ambient temperature is <2 dB.

M-noise is a full bandwidth, (10Hz–22.5kHz) test signal developed by Meyer Sound to better measure the loudspeaker’s music performance.
It has a constant instantaneous peak level in octave bands, a crest factor that increases with frequency, and a full bandwidth Peak to RMS
ratio of 18 dB. The presence of a greater-than (>) symbol with regard to crest factor indicates it may be higher depending on EQ and boundary
loading.

Pink noise is a full bandwidth test signal with Peak to RMS ratio of 12.5 dB.

B-noise is a Meyer Sound test signal used to ensure measurements reflect system behavior when reproducing the most common input spectrum,

and to verify there is still headroom over pink noise.

5. Pins 4 and 5 (RMS) only included with XLR 5-pin connector that accommodates both balanced audio and RMS signals.

6. Peak power based on the maximum unclipped voltage the amplifier will produce into the nominal load impedance.

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

ARCHITECTURAL SPECIFICATIONS

The loudspeaker shall be a compact, self-powered, linear, low-distortion,
low-frequency control element and shall be capable of flown,
ground-stacked, and cardioid configurations. Its transducer shall be one
15-inch, dual-coil, long-excursion cone driver with 2 Ω nominal impedance.

The loudspeaker shall incorporate internal processing and a 2-channel,
open-loop, class D amplifier. Processing shall include equalization, phase
correction, and driver protection. Performance specifications for a typical
production unit shall be as follows: operating frequency range shall be 35–
125Hz; frequency range shall be 37–110 Hz ±4 dB (measured in half-space
with pink noise at 4 m, 1/3-octave frequency resolution); phase response
shall be 43Hz–110 Hz ±30°; linear peak SPL shall be 130.5 dB with crest
factor >9 dB, measured in half-space with M-noise at 4 m referred to 1 m.

Audio connectors shall be XLR 3-pin, female with male loop, accommodating
balanced audio, or XLR 5-pin, accommodating both balanced audio and
RMS.

The internal power supply shall perform EMI filtering, soft current turn-on,
and surge suppression. Power requirements shall be nominal 100, 110, or
230 V AC line current at 50–60 Hz. UL and CE operating voltage range shall
be 100–240 V AC at 50–60 Hz. AC power connectors for input and loop

Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702

+1 510 486.1166
www.meyersound.com/contact
www.meyersound.com

output shall be powerCON 20.

Maximum long-term continuous current draw shall be 5.3 A rms at
115VAC, 2.7 A rms at 230 V AC, and 6.2 A rms at 100 V AC.

The loudspeaker shall accommodate an optional RMS remote monitoring
system module.

Components shall be mounted in an optimally tuned, vented enclosure
constructed of premium multi-ply birch with a slightly textured black finish.
Optional rigging for the enclosure shall include end frames with captive
GuideALinks for linking units in vertical arrays with 0°, 1.5°, 3.25°, or 4.75°
splay angles. The front protective grille shall be powder-coated, hex­stamped steel with acoustical black mesh.

Dimensions shall be 21.80 inches (554 mm) wide x 20.30 inches (515 mm)
high x 20.88 inches (530 mm) deep. Dimensions with optional rigging
shall be 21.55 inches (547 mm) wide x 20.43 inches (519 mm) high x

20.88inches (530 mm) deep. Weight shall be 89 lbs (40.3 kg). Weight with
optional rigging shall be 105 lbs (47.6 kg).

The loudspeaker shall be the Meyer Sound 750-LFC

750-LFC

04.271.004.02 A2
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