Overview
Meyer Sound’s 750-LFC compact low-frequency control element reproduces low frequencies at high, continuous output levels 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.
A newly designed class D amplifier affords unprecedented 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.
In addition to pairing with LINA™ systems, the 750-LFC integrates easily with other Meyer Sound loudspeaker systems, including the LEOPARD™ and ULTRA Series loudspeakers.
Meyer Sound’s Galileo® 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 monitoring of system parameters from a Mac® or Windows®-based computer.
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™ allow it to be flown from the MG-MINA/LINA multipurpose grid in LINA arrays without any transition frame between the 750-LFC and LINA.
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.
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
Specifications
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ACOUSTICAL1 |
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Operating Frequency Range2 |
35 Hz – 125 Hz |
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Frequency Response3 |
37 Hz – 110 Hz ±4 dB |
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Phase Response |
43 Hz – 110 Hz ±30° |
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Linear Peak SPL4 |
130.5 dB with crest factor >9 dB (M-noise), 130.5 dB (pink noise), 132 dB (B-noise) |
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COVERAGE |
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360° (single unit); varies with number of units and configuration |
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TRANSDUCERS |
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Low Frequency |
One 15-inch, dual-coil, long-excursion cone driver; 2 Ω nominal impedance |
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AUDIO INPUT |
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Type |
Differential, electronically balanced |
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Maximum Common Mode Range |
±15 V DC, clamped to earth for voltage transient protection |
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Connectors |
XLR 3-pin female with male loop. Optional 5-pin connectors to accommodate both balanced audio and RMS signals |
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Input Impedance |
10 kΩ differential between pins 2 and 3 |
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Wiring5 |
Pin 1: Chassis/earth through 1 kΩ, 1000 pF, 15 V clamped network to provide virtual ground lift at audio frequencies Pin 2: Signal (+) Pin 3: Signal (–) Pin 4: RMS Pin 5: RMS Case: Earth ground and chassis |
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Nominal Input Sensitivity |
6.0 dBV (2.0 V rms) continuous is typically the onset of limiting for noise and music |
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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 |
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AMPLIFIER |
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Type |
2-channel, open-loop, class D |
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Total Output Power6 |
3100 W peak |
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THD, IM, TIM |
< 0.02% |
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Cooling |
Convection |
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AC POWER |
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Connectors |
powerCON 20 input with loop output |
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Automatic Voltage Selection |
90–265 V AC; 50–60 Hz |
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Safety Agency Rated Voltage Range |
100–240 V AC, 50–60 Hz |
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Turn-on and Turn-off points |
Turn-on: 90 V AC; Turn-off: none; internal fuse protection above 265 V AC |
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CURRENT DRAW |
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Idle |
0.39 A rms (115 V AC), 0.38 A rms (230 V AC), 0.42 A rms (100 V AC) |
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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) |
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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) |
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Maximum Instantaneous Peak |
15.3 A peak (115 V AC), 7.8 A peak (230 V AC), 18 A peak (100 V AC) |
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Inrush Current |
< 20.0 A peak |
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RMS NETWORK (OPTIONAL) |
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Two-conductor, twisted-pair network, capable of reporting all operating parameters of amplifiers to system operator’s host computer. |
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PHYSICAL |
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Dimensions without Rigging |
W: 21.80 in (554 mm) x H: 20.30 in (515 mm) x D: 20.88 in (530 mm) |
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Dimensions with Rigging |
W: 21.55 in (547 mm) x H: 20.43 in (519 mm) x D: 20.88 in (530 mm) |
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Weight without Rigging |
89 lbs (40.3 kg) |
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Weight with Rigging |
105 lbs (47.6 kg) |
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Enclosure |
Premium multi-ply birch with slightly textured black finish |
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Protective Grille |
Powder-coated, hex-stamped steel with acoustical black mesh |
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Rigging |
Optional MRK-750 rigging kit with end frames and captive GuideALinks secured 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 |
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Pole Mount |
U.S. version: 1.5 in (38 mm) E.U. version: 1.375 in (35 mm and M20 thread at the bottom) |
