Bose FREESPACE 4400, Service Manual

Page: 6 / 107

6
SPECIFICATIONS
Line Input Source 1 and 2
Nominal Limits Conditions
Source impedance: 200 Ohms 10 to 2k Ohm Frequency response specification maintained
with sources over this range
Input impedance
differential:
+/> 50k Ohm +/-20% At 1 kHz
CMRR referred to 80 dB >/= 74 dB At 1 kHz, 20 dB gain, 200 Ohm source
output: impedance
Input sensitivity for -20 dBV to +/-1 dB At 1 kHz
codec FS: +17 dBV
Gain, all settings: 20 dB to +/-1 dB 1 kHz, 50 Ohm source
-20 dB
Maximum input level: +17 dBV >/= +17 dBV THD+N </= 0.3%, 30-20 kHz, 0 dB gain
THD+N: .001% .01% At +10 dBV output, 1 kHz, 20 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB
Crosstalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 30 to 20 kHz +/-1.5 dB Reference 1 kHz, measured at 20 dB gain
and with 0 dBV output
Page and Aux/Mic Inputs
Nominal Limits Conditions
Source impedance: 200 Ohms 10 to 2k Ohm Frequency response specification maintained
with sources over this range
Input impedance
differential:
20k Ohm +/-5% At 1 kHz
Equivalent input noise at 60 dB, at 60 dB, A-weighted RMS, 200 Ohm source
at INA129 gains of 60 -130 dBV -127 dBV termination
dB, 40 dB, 20 dB and at 40 dB, at 40 dB,
0 dB: -127 dBV -125 dBV
at 20 dB, at 20 dB,
-115 dBV -113 dBV
at 0 dB, at 0 dB,
-96 dBV -93 dBV