Bose FREESPACE 4400, Service Manual

Page: 8 / 107

8
SPECIFICATIONS
Sense Mic inputs (continued)
Nominal Limits Conditions
Maximum input level: +10 dBV >/= 7 dBV THD+N </= 0.3%, 20-20 kHz, 0 dB gain
THD+N: -84 dB </= -80 dB At +10 dBV output, 1 kHz, 60 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB
Crossalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 20 Hz to +0/-0.5 dB Reference 1 kHz, measured at 60 dB
gain and 20 kHz with 0 dBV output
Direct Input
Nominal Limits Conditions
Source impedance: 200 Ohms 10 to 2k Ohm Frequency response specification maintained
with sources over this range
Input impedance
differential:
+/> 10kOhms +/-20% At 1 kHz
CMRR referred
to output:
92 dB >/= 60 dB At 1 kHz, 20 dB gain, 200 Ohm source
impedance
Input sensitivity -20 dBV to +/-1 dB At 1 kHz
for codec FS: +17 dBV
Gain: 0 dB +/-1 dB From input connector to amplifier input stage
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 Hz to +0/-0.5 dB Reference 1 kHz, measured at 20 dB gain and
20 kHz with 0 dBV output
Line Outputs
Nominal Limits Conditions
Output impedance: 200 Ohms +/-1% Impedance at 1 kHz, each output
terminal
Maximum output level: +17 dBV >/= +17 dBV 1 kHz, THD less than 0.1%, load 10 k Ohm,
differential