Bose FreeSpace 4400 Service Manual page 10

Power Amplifier
Power bandwidth:
Frequency response:
THD+N at 70.7 Vrms,
200W:
THD+N at 70.7 Vrms,
400W:
THD+N at 100 Vrms,
200W:
THD+N at 100 Vrms,
400W:
Sensitivity at 70V:
Sensitivity at 100V:
Gain:
Output noise:
Crosstalk at 1 kHz:
Crosstalk at 10 kHz:
Turn on/off pop:
SPECIFICATIONS
Nominal Limits
30 Hz to 1% THD
20 kHz
30 Hz to +/-3 dB
20 kHz
.05% .1%
.5% 1%
.05% .1%
.5% 1%
11 dBV +/-1 dBV
14 dBV +/-1 dBV
26 dB +/-0.5 dB
-70 dBV -65 dBV
-90 dB </= -80 dB
-70 dB </= -60 dB
10 mV peak </= 50 mVpk As monitored by a listener, must be inaudible at
Conditions
Loaded at 25 Ohms
Output voltage of 10 Vrms over a load
impedance of 12.5 Ohms to 1000 Ohms
30 Hz to 20 kHz, 25 Ohm load, A weighted
7 kHz, 12.5 Ohm load, A weighted
30 Hz to 20 kHz, 25 Ohm load, A weighted
7 kHz, 12.5 Ohm load, A weighted
A-weighted with a 20 kHz filter
Set for 0 dB gain, no limiting, terminate the
unused input with a 50 Ohm resistor
full gain using a Model 32 loudspeaker tapped
at 32W, with the unit set for no EQ and the
loudspeaker 3 feet from listener
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