Electro-Voice CONTRACTOR PRECISION SERIES, Руководство по обслуживанию

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F. FREQUENCY RESPONSE
• -3 dB level drop, referenced to the level at the standard frequency of 1 kHz
• the power amplifier's border frequencies are at 13 Hz and 40 kHz respectively, referenced to -1 dB
Amplification frequency response
Input
Output f (u) f (o) Remarks
INPUT A/B SPEAKER A/B <10 Hz 75 kHz HI-LO-CUT Off
INPUT A/B SPEAKER A/B 20 Hz 35 kHz HI-LO-CUT On
Distortion-limited transmission range (performance bandwidth)
• THD = 0.1 %, 1/2 nominal power at 4 ohms, MBW = 500 kHz
Input Output f (u) f (o) Remarks
INPUT A/B SPEAKER A/B <10 Hz 48 kHz HI-LO-CUT Off
G. PHASE RESPONSE ±30° (20 Hz - 20 kHz, HI/LO-CUT off)
H. INPUT IMPEDANCE 20 k
Ω
(20 Hz … 20 kHz)
I. AMPLITUDE NON-LINEARITY
Amplitude non-linearity Remarks
nominal overall distortion
<0.05 % MBW = 80 kHz, f = 1 kHz
standard overall distortion <0.02 % MBW = 80 kHz, f = 1 kHz
IMD-SMPTE <0.01 % 60 Hz, 7 kHz
DIM 30
<0.01 % 3.15 kHz, 15 kHz
DIM 100
<0.01 % 3.15 kHz, 15 kHz
J. CROSSTALK - at f = 1 kHz less than <-70 dB
K. DAMPING FACTOR - internal at f = 1 kHz >300
at f = 100 Hz >400
L. SLEW RATE - internal >40 V/µs
M. NOISE INTERFERENCE
- U(F) = external voltage un-weighted with B = 22 Hz … 22 kHz, effective value (IEC 268-1)
- U(G) = noise voltage, frequency-weighting filter according to CCIR-468-3, quasi peak weighted (IEC 268-1)
- U(A) = interference voltage A-weighted, dB(A), effective value (IEC 268-1)
- Signal-to-noise ratio referenced to a nominal output voltage of 69.3 V (1200W/4ohms)
- HI/LO-CUT ON, GND LIFT = GROUNDED
Interference
output voltage
S/N ratio Equivalent input
interference
voltage
Equivalent input
interference level
Residual
interference
output voltage
U(F) < 615µV > 101 dB < 6.9µV < -101 dBu < 435µV
U(G)
< 3.65 mV > 85.5 dB < 41µV < -85.5 dBu < 1.55mV
U(A)
i.s.=0dBu
< 490µV > 103 dB < 5.5µV < -103 dBu < 345µV
U(A)
i.s.=6dBu
< 245µV > 109 dB < 5.5µV < -103 dBu < 170µV
U(A)
Gain=26dB
< 110µV > 116 dB < 5.5µV < -103 dBu < 90µV
The S/N ratio (A-weighted) at max. output voltage at 4
Ω
is >103 dB.
N. DIMENSIONS
Height : 132.5 mm (3 HU)
Width : 483 mm
Depth : 426 mm
O. WEIGHT m = 29 kg
P. EXTENSIONS optionally available 2 x input transformer NRS 90176
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