Meyer Sound VLFC Very Low Frequency Self-Powered Loudspeaker System with 5-Pin XLR
The VLFC very low‑frequency control element is a self‑powered loudspeaker defined by its sonic linearity and unique ability to reproduce extremely low‑frequency signals at high continuous levels with very low distortion. This very low frequency response, coupled with exceptional headroom and optimized rigging options, makes the VLFC an incredible tool for applications requiring very low frequencies to enhance the audience experience. The VLFC is ideal for any application that would benefit from the impact of sub-sonic feeling—from large‑scale tours to special effects in cinema to theme parks.
Features:
- Sub-sonic frequency response and linearity bring new possibilities for enhanced impact system design
- Easily integrates with 1100-LFCs
- High peak power output yields excellent transient reproduction of very low frequencies and extreme operating levels
- Stackable and flyable with other VLFCs and 1100-LFCs in regular and cardioid arrays
Specifications:
- Acoustical:
- Operating Frequency Range: 13–35 Hz
- Frequency Response: 13–30 Hz ±4 dB
- Phase Response: 13–30 Hz ±30°
- Linear Peak SPL: 125.5 dB with crest factor >10.5 dB (M-noise), 125.5 dB (Pink noise)
- Coverage: 360° (single unit); varies with number of units and configuration
- Transducers:
- Low Frequency: Two 18-inch long-excursion low-resonance cone drivers; 8 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 5-pin female input with male loop output; XLR 3-pin female connectors available to accommodate only balanced audio (no RMS signals)
- Input Impedance: 10 kΩ differential between pins 2 and 3
- Wiring:
- Pin 1: Chassis/earth through 1 kΩ, 1000 pF, 15 V clamp 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: 0 dBV (1.0 V rms) continuous is typically the onset of limiting for noise and music
- Input Level: Audio source must be capable of producing of +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 complementary MOSFET output stages (Class AB/H bridged)
- Total Output Power: 5600 W peak
- THD, IM, TIM: < 0.02%
- Cooling: Three ultra high-speed primary fans; three ultra high-speed reserve fans
- AC Power:
- Connectors: powerCON 32 input
- Automatic Voltage Selection: 208–235 V AC, 50/60 Hz
- Safety Rated Voltage Range: 208–235 V AC, 50/60 Hz
- Turn-on and Turn-off Points: 165 V AC turn-on; 264 V AC turn-off
- Current Draw:
- Idle Current: 0.6 A rms (230 V AC)
- Maximum Long-Term Continuous Current (>10 sec): 10.5 A rms (230 V AC)
- Burst Current (<1 sec): 18 A rms (230 V AC)
- Maximum Instantaneous Peak Current: 53 A peak (230 V AC)
- Inrush Current: < 30 A peak
- RMS Network (Optional): Equipped with 2-conductor, twisted-pair network, reporting all amplifier operating parameters to host computer
- Physical:
- Dimensions without Rigging: W: 54.65 in (1388 mm) x H: 20.48 in (520 mm) x D: 33 in (838 mm)
- Dimensions with Rigging: W: 54.65 in (1388 mm) x H: 20.48 in (520 mm) x D: 33 in (838 mm)
- Weight without Rigging: 298 lb (135.2 kg)
- Weight with Rigging: 332 lb (150.7 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-1100 rigging kit with captive GuideALinks secured with 0.5 in x 1.25 in quick release pins. Rigging supports ground-stacked, flown, and cardioid configurations
