Meyer Sound UPJunior - Manual (Page 10)

UPJunior
SPECIFICATIONS
ACOUSTICAL
Operating frequency range 1 70 Hz - 20 kHz
Frequency response 2 76 Hz - 18 kHz ±4 dB
Phase response 250 Hz - 18 kHz ±45°
Maximum peak SPL 3 126 dB
Dynamic range >110 dB
Coverage 4 80° x 50°
Acoustical crossover 5 3.5 kHz
TRANSDUCERS
Low frequency One 8” cone driver with neodymium magnet
Nominal impedance: 4 Ω
Voice coil size: 1.5”
Power handling capability: 300 W (AES) 6
High frequency 7 One 2” compression driver
Nominal impedance: 12 Ω
Voice coil size: 2”
Diaphragm size: 2”
Exit size: 0.75”
Power handling capability: 100 W (AES) 6
AUDIO INPUT
Type Differential, electronically balanced
Max. 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 pins 2 and 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) 8
Case: Earth ground and chassis
DC Blocking Differential DC blocking on input 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 dB V (1 V rms, 1.4 V peak) continuous coverage is typically the onset of limiting for noise and music
Input level Audio source must be capable of producing +20 dBV (10 V rms, 14 V peak) into 600 Ω in order to produce maximum
peak SPL over the operating bandwidth of the loudspeaker
AMPLIFIERS
Amplifier type Two-channel complementary power MOSFET output stages (class AB/bridged)
Output power 9 300 W total
THD, IM TIM < .02%
Load capacity 4 Ω low channel; 12 Ω high channel
Cooling Forced air cooling over amplifier heatsink
1 Recommended maximum operating
frequency range. Response depends
upon loading conditions and room
acoustics.
2 Measured free field with 1/3-octave
frequency resolution at 4 meters.
3 Measured with music referred to 1 meter.
4 The UPJunior horn can be rotated to
provide an 80° x 50° coverage pattern in
either the horizontal or vertical plane.
5 At this frequency, the transducers
produce equal sound pressure levels.
6 Power handling measured using
AES standards: transducer driven
continuously for two hours with band
limited noise signal having a 6 dB peak-
average ratio.
7 High frequency driver is coupled to an
80° x 50° constant-directivity horn.
8 An optional input module is available
that includes a polarity reversal switch
and attenuator (0–18 dB).
9 Wattage rating is based on the maximum
unclipped burst sine-wave rms voltage
the amplifier will produce into the
nominal load impedance — low and high
channels 30 V rms (42 V peak) into load
impedance.