Meyer Sound DF-4 Powered Loudspeaker
The Meyer Sound DF-4 is a medium-throw down fill self-powered loudspeaker system designed for supplementing coverage in systems employing suspended loudspeaker arrays. It provides even coverage to the areas below and to the front of the arrayed loudspeakers above, with frequency and phase response similar to Meyer Sound loudspeaker components typically used in medium-to-large loudspeaker systems. The self-powered DF-4 produces a maximum peak output of 138 dB SPL (@ 1 meter) within its operating frequency range of 60 Hz to 18 kHz.
Features:
- Integrated control electronics and amplifiers
- TruPower™ Limiting (TPL)
- Intelligent AC™ System
- Compatible with RMS™ (Remote Monitoring System)
- High power, flat frequency response
- Extremely low distortion
- L-Track rigging system
- Arrayable and Flyable
Specifications:
- ACOUSTICAL (each loudspeaker)
- Operating Frequency Range: 60 Hz - 18 kHz
- Free Field: 65 Hz - 18 kHz ± 4 dB
- Half-Space: 55 Hz - 18 kHz ± 4 dB
- Phase Response: ± 60° from 200 Hz to 14 kHz
- Maximum Peak SPL: >138 dB
- Signal to Noise Ratio: >110
- COVERAGE
- 50° symmetrical on 40° cabinet angle
- CROSSOVER
- TRANSDUCERS
- Low Frequency: MS-815 15-inch cone driver
- High Frequency: MS-2010C 4-inch diaphram 2-inch throat compression driver
- AUDIO INPUT
- Type: 10k impedance, electronically balance
- Connectors: XLR (A-3) male and female
- Nominal Input Level: +4 dBu (1.23 Vrms)
- AMPLIFIER
- Type: Complementary power MOSFET output stages (class AB/H)
- Burst capability: 1240 Watts (620 Wrms/channel)
- THD, IM TIM: <.02%
- AC POWER
- Connectors: 250V NEMA L6-20P (twistlock) inlet or IEC 309 male
- Automatic voltage selection: 95-125 VAC and 208-235 VAC; 50/60 Hz
- Operational Voltage Range:
- Turn on: 85 VAC; Turn off: 134 VAC; 50/60 Hz
- Turn on: 165 VAC; Turn off: 264 VAC; 50/60 Hz
- Max Continuous RMS Current (>10 sec): @115 V: 8A @230V: 4A @100V: 10A
- Burst RMS Current (< 1 s): @115 V: 15A @230V: 8A @100V: 18A
- Max Peak Current During Burst: @115 V: 22Apk @230V: 11Apk @100V: 25Apk
- Soft Start Turn-on: Inrush current <12A@115V
- PHYSICAL
- Dimensions: Height: 21.625” (549.275 mm); Width: 21.125” (536.575 mm); Depth: 26.375” (669.925 mm)
- Weight: 120 lb (55 kg)
- Enclosure/Finish: Multi-ply Finnish Birch
- Protective Grill: Powder-coated Hex stamped steel
- Rigging:
- L-Track is provided at four corners
- Three aircraft pan fittings (ring & stud) or nut plates (m-10 or 3/8") can be provided as an option