Meyer Sound UMS-1P

Acoustical
Operating Frequency Range: 25 Hz - 160 Hz
Frequency Response: 29 Hz - 135 Hz ±4 dB
Phase Response: 41 Hz - 155 Hz ±30°
Maximum Peak SPL: 127 dB
Dynamic Range: >110 dB

Coverage
360° single unit; varies for multiple units, depending on number and configuration

Transducers

• Low Frequency
  • Two 10" cone drivers
  • Nominal impedance: 4Ω
  • Voice coil size: 2"
  • Power-handling capability: 400 W

Audio Input

• Type: Differential, electronically balanced
• Maximum Common Mode Range: ±15 V DC, clamped to earth for voltage transient protection
• Connectors: Female XLR input with male XLR loop output
• Input Impedance: 10 kΩ differential between pin 2 & 3
• Wiring
  • Pin 1: Chassis/earth through 220 kΩ, 1000 pF, 15 V clamp network to provide virtual ground lift at audio frequencies
  • Pin 2: Signal +
  • Pin 3: Signal - (optional polarity reversal switch)
  • Case: Earth ground and chassis
• DC Blocking: Differential DC blocking up to max common mode voltage
• CMRR: >50 dB, Typically 80 dB (50 Hz - 500 Hz)
• RF Filter: Common Mode: 425 kHz; Differential Mode: 142 kHz
• TIM Filter: <80 kHz, integral to signal processing
• Nominal Input Sensitivity: 0 dBV (1 V rms, 1.4 V pk) continuous is typically the onset of limiting for pink noise and music
• Input Level: Audio source must be capable of producing a minimum of +20 dBV (10 V rms, 14 V pk) into 600Ω in order to produce maximum peak SPL over the operating bandwidth of the loudspeaker

Amplifier

• Type: Two-channel complementary MOSFET output stages (class AB/bridged)
• Output Power: 450 W total
• THD, IM, TIM: <.02 %
• Load Capacity: 4Ω both channels
• Cooling: Convection

AC Power

• Connector: PowerCon with looping output
• Voltage Selection: External 115/230 V AC switch (100 V AC version available)
• Operating Voltage Ranges: 105 V AC - 130 V AC (115 V AC); 210 V AC - 260 V AC (230 V AC)

Current Draw

• Idle Current: .0.13 A rms (115 V AC); 0.065 A rms (230 V AC); 0.15 A rms (100 V AC)
• Max Long-Term Continuous Current (>10 sec): 1 A rms (115 V AC); 0.5 A rms (230 V AC); 1.2 A rms (100 V AC)
• Burst Current (<1 sec): 1.3 A rms (115 V AC); 0.65 A rms (230 V AC); 1.5 A rms (100 V AC)
• Ultimate Short-Term Peak Current Draw: 2.9 A pk (115 V AC); 2 A pk (230 V AC); 3.3 A pk (100 V AC)
• Inrush Current: 18 A pk (115 V AC); 12 A pk (230 V AC); 15 A pk (100 V AC)