Appendix C: Upjunior Specifications - Meyer Sound UPJunior UltraCompact VariO Operating Instructions Manual

APPENDIX C: UPJUNIOR SPECIFICATIONS

ACOUSTICAL
Operating Frequency 70 Hz – 20 kHz
Range Note: Recommended maximum operating frequency range. Response depends on
loading conditions and room acoustics.
Frequency Response 76 Hz – 18 kHz ±4 dB
Note: Measured free field with 1/3 octave frequency resolution at 4 meters.
Phase Response 250 Hz – 18 kHz ±45°
Maximum Peak SPL 126 dB
Note: Measured with music referred to 1 meter.
Dynamic Range >110 dB
Coverage 80° x 50°
Note: The UPJunior horn can be rotated to provide an 80° x 50° coverage pattern in
either the horizontal or vertical plane.
Crossover 3.5 kHz
Note: At this frequency, the transducers produce equal sound pressure levels.
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)
Note: Power handling measured using AES standards: transducer driven continuously
for two hours with band limited noise signal having a 6 dB peak-average ratio.
High Frequency 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)
Note: Power handling measured using AES standards: transducer driven continuously
for two hours with band limited noise signal having a 6 dB peak-average ratio.
Note: High frequency driver is coupled to an 80° x 50° constant-directivity horn.
AUDIO INPUT
Type Differential, electronically balanced
Maximum Common ±15 V DC, clamped to earth for voltage transient protection
Mode Range
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)
Case: Earth ground and chassis
Note: An optional input module is available that includes a polarity reversal switch and
attenuator (0–18 dB).
DC Blocking Differential DC blocking on input up to maximum common mode voltage
CMRR >50 dB, typically 80 dB (50–500 Hz)
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