Meyer Sound UPJunior - UPJunior Specifications; Acoustical Specifications; Transducer Specifications; Audio Input Specifications

UPJ u n ior
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.