Meyer Sound MSL-4 Powered Loudspeaker

The MSL-4 is an arrayable, high-Q long-throw reinforcement loudspeaker. It operates with a very flat frequency response all the way from 18kHz down to an impressive 65Hz. To get an even lower range, the unit works well with mid-bass loudspeakers and subwoofers. The MSL-4 is unique; it is the first high-power, high performance, self-contained reinforcement speaker. By integrating the controllers, amplifiers, and speaker components into one unit, sound designers are no longer required to waste time fussing with different amplifier gains, rack wiring, loudspeaker protection, or other problems that can compromise a system’s performance. All that is required is to hookup AC power and run a good quality signal source into it. What could be simpler? The MSL-4 literally does all the work. The power system utilizes the Intelligent AC system, which provides for automatic voltage selection, EMI filtering, soft current turn on, surge suppression, and dual circuit breakers. The MSL-4 is highly arrayable, with a very precise coverage pattern: 40° horizontal by 35° vertical. The unit can be tight-packed to get high power over long distances, or splayed to increase the horizontal coverage.

Specifications:

• Acoustical(each loudspeaker)
  • Frequency Response¹:
  • ±4 dB from 65 Hz to 18 kHz
  • -6 dB at 60 Hz and 20 kHz
  • Phase Response¹: ±30˚ from 450 Hz to 10 kHz
  • Maximum SPL¹: 140 dB@1 meter
  • Dynamic Range: >110 dB
• Cover age
  • (-6 dB points): 4030˚ H ; 3530˚ V
• Crossover
  • 800 Hz
• Transducers
  • Low Frequency: 12" diameter MS-12 cone (3" voice coil)
  • High Frequency: 2" throat (4" diaphragm) MS-2001A compression drive
• Audio Input
  • Type: 10kΩ impedance, electronically balanced
  • Connector: XLR (A-3) male and female
  • Nominal Input Level: +4 dBu
• Amplifiers
  • Type: Complementary power MOSFET output stages (audio class AB/H)
  • Burst capability²: 1240 watts (620 watts/channel)
  • THD, IM, TIM: < .02 %
• AC Power
  • Connector: 250V NEMA L6-20P (twistlock) inlet or IEC 309 male inlet³
  • Automatic voltage selection: 95-125 VAC and 208-235 VAC; 50/60 Hz⁴
  • 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 sec): @115 V: 15A @230V: 8A @100V: 18A
  • Max Peak Current During Burst: @115 V: 22Apk @230V: 11Apk @100V: 25Apk
  • Soft Current Turn-on: Inrush current <12A@115V
• Physical
  • Dimensions: 21 1/4" W x 36" H x 30" D
  • Weight: 180 lbs (82 kg)/Shipping: 213 lbs. (97kg)
  • Enclosure: Multi-ply hardwood
  • Finish: Black textured
  • Protective Grill: Hex perforated metal screen, foam covering
  • Rigging: Aircraft pan fittings, three on both top and bottom. Working load for each fitting is 600 lbs, which is 1Ú5 the cabinet breaking strength (with straight tensile pull).