Bose FreeSpace Business E4 II Series Service Manual page 6

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