Meyer Sound 750-LFC Compact Low-Frequency Control Element with Rigging

About: Meyer Sound 750-LFC Compact Low-Frequency Control Element with Rigging

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.

Features

• 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

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.

Big-System Sound in a Small Subwoofer Package

• LOW-PROFILE LOW-END ENHANCEMENT - The 750-LFC low-frequency-control element’s impressive power-to-size-ratio and versatile features make it the right choice for any application demanding superior low-frequency performance in low-profile systems. It pairs perfectly with ULTRA‑X40 and LINA systems, extending response down to 36 Hz for deeper, richer bass with total control.
• LARGE-SYSTEM LINEARITY, LIGHTWEIGHT DESIGN - The 750-LFC offers the same linearity as its larger siblings, the 900‑LFC and 1100‑LFC in our smallest, lightest arrayable subwoofer. Its 15-inch, dual-voice coil, long-excursion driver faithfully reproduces source material across the entire low-frequency spectrum, offering extremely low distortion and optimized phase response.
• UNPRECEDENTED POWER FOR ITS SIZE - The 750-LFC is driven by a two-channel, open-loop Class D amplifier that provides discrete, precisely synchronized power to each voice coil. This efficient, lightweight design, coupled with sophisticated signal processing, means you can count on the 750-LFC to reproduce low frequencies at high continuous levels with clarity and punch.

More Bass, for More Applications

• EXTENDED LOW END, INSTALLED OR ON THE ROAD - The 750-LFC’s compact footprint gives you the flexibility to bring superior low-frequency performance to situations where space is at a premium—whether you’re on tour or designing fixed installations for venues ranging from theatres and houses of worship to corporate spaces and theme parks.
• TAKE YOUR SYSTEM TO THE NEXT LEVEL - The 750-LFC lets you bring your existing system to its fullest sonic potential. It pairs seamlessly with both LINA and ULTRA series systems, and with an optional rigging frame, can be flown with LINA arrays without a transition grid. And its integral pole mount supports one or two speakers, for streamlined rigs.
• SOPHISTICATED SOFTWARE GIVES YOU COMPLETE CONTROL - Tailor 750-LFC’s performance with pinpoint accuracy, using Meyer Sound’s software tools: Optimize system configuration with the MAPP 3D system design and prediction tool, apply corrective EQ and fine-tune with the Galileo GALAXY loudspeaker management system, and monitor system performance in real time with optional RMS remote monitoring.
• EFFORTLESS RIGGING, WHEN EVERY MINUTE COUNTS - The 750-LFC’s active design means no amp racks, no long cable runs, and no gain and crossover calibration to worry about. And its light weight and hassle-free hardware make it easy for anyone on your crew to get the system up and running, fast.

Why Self-Powered?

Self-powered loudspeakers offer several advantages over their passive counterparts when it comes to fidelity, reliability, and simplicity. The great part is, you’ll start to reap the benefits of a self-powered system before you even power up.

Ease of Deployment

System set-up is so much easier when you have fewer components and fewer cables to worry about being miswired. Since self-powered loudspeakers incorporate amplification, you’ll never have to deal with matching speakers to amplifiers or connecting components. You don’t have to worry about calibration of gain and crossover setting which means more time focusing on the show. Eliminating amp racks doesn’t just streamline system deployment, it streamlines your inventory whether you’re a rental house or a road warrior. And when you consider that the average amp rack weighs nearly 300 pounds and takes up four feet of truck space, the efficiencies get even clearer. Let alone when you want to fly the amplifier racks to get closer to the speakers, often requiring more rigging points and more motors.

Predictable, Reliable Operation

Internal amplification is closely matched to drivers. Because individual components have been optimized during manufacturing, you can expect consistent sound from show to show. Built-in, factory-optimized protection circuitry provides extra assurance without degrading signal quality. And, when you have less equipment, you have less risk of failure.

Better Frequency and Phase Response

Because self-powered loudspeakers incorporate sophisticated processing, they are calibrated to exhibit optimal response curves in key performance parameters. Active crossovers are more precise, sophisticated designs, and bi-amped systems are time aligned, eliminating phase issues. The result? Accurate sound throughout the speaker’s range, at any volume level.

Unparalleled Clarity

In powered monitors, internal amplifiers are precision-matched to drivers, delivering optimal power at all times for cleaner sound. And because amps are built into loudspeaker cabinets, there’s no need for long lengths of connecting cable, which can become prone to distortion and signal loss.

Tighter Transients

Since self-powered loudspeakers have very short internal cables, amps inside can more effectively dampen driver mechanical motion, which leads to better sonic accuracy and tighter, crisper transients. (And, there’s none of the loss in levels and signal quality inherent over long cable distances.)

Specifications

• ACOUSTICAL
  • Operating Frequency Range -  35 Hz – 125 Hz
  • Frequency Response -  37 Hz – 110 Hz ±4 dB
  • Phase Response -  43 Hz – 110 Hz ±30°
  • Linear Peak SPL
    • 130.5 dB with crest factor >9 dB (M-noise),
    • 130.5 dB (pink noise), 132 dB (B-noise)
• COVERAGE
  • 360° (single unit); varies with number of units and configuration
• TRANSDUCERS
  • Low Frequency -  One 15-inch, dual-coil, long-excursion cone driver; 2 Ω nominal impedance
• AUDIO INPUT
  • 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
  • Wiring
    • 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
  • 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
• AMPLIFIER
  • Type -  2-channel, open-loop, class D
  • Total Output Power -  3100 W peak
  • THD, IM, TIM -  < 0.02%
  • Cooling -  Convection
• AC POWER
  • 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
• CURRENT DRAW
  • 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) -  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)
  • Inrush Current -  < 20.0 A peak
• RMS NETWORK (OPTIONAL)
  • Two-conductor, twisted-pair network, capable of reporting all operating parameters of amplifiers to system operator’s host computer.
• PHYSICAL
  • Dimensions without Rigging (WxHxD) -  21.80 x 20.30 x 20.88 inch (554 x 515 x 530mm)
  • Dimensions with Rigging (WxHxD) -  21.55 x 20.43 x 20.88 inch (547 x 519 x 530mm)
  • 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
  • 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 
  • Pole Mount -  U.S. version: 1.5 in (38 mm)