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APPENDIX B
AUDIO INPUT — UPM-1P/UPM-2P
Type Differential, electronically balanced
Max. common mode range ±15 V DC, clamped to earth for voltage transient protection
Connectors Female XLR input and male XLR loop output
Input impedance 10 kΩ differential between pins 2 and 3
Wiring Pin 1: Chassis/earth through 220 kΩ, 1000pF,
15V clamp network to provide virtual ground lift at audio frequencies;
Pin 2: Signal +
Pin 3: Signal -
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 low-pass; Differential mode: 142 kHz
TIM filter Integral to signal processing (<80 kHz)
Nominal input sensitivity 0 dBV (1 V rms, 1.4 V pk). 0 dBV continuous average 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 600 Ω in order to produce maximum peak SPL over the operating bandwidth of the
loudspeaker.
AMPLIFIERS — UPM-1P/UPM-2P
Note: The specific functions for each model such as crossover points, frequency and phase response, and driver
protection are determined by the control card installed inside the amplifier.
Amplifier type Two-channel complementary MOSFET output stages class AB/bridged
Output power 350 W total
Note: Amplifier wattage rating is based on the maximum unclipped burst sine-wave rms
voltage the amplifier will produce in to the nominal load impedance low and high channels
30 V rms (42 V pk) into load impedance.
THD, IM TIM < .02%
Load capacity 4 Ω low-frequency channel, 8 Ω high-frequency channel
Cooling Convection
AC POWER — UPM-1P/UPM-2P
AC power connector PowerCon with looping output
Voltage selection External 115/230 V AC switch (100 V option available)
Safety agency rated
operating voltage
115 V AC - 240 V AC
Turn on/turn off points Recommended voltage: 105 V AC - 130 V AC (115 V AC); 210 V AC - 260 V AC (230 V AC);
no turn-off, only fuse protected above 135 V AC and 265 V AC
(For 100 V AC version 90 V AC - 100 V AC recommended, 115 V AC max)
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); at 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)
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