Bose ACOUSTIMASS PRO, Руководство пользователя

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8
Use for serial numbers 050121 and above
(later EQ)
Use for serial numbers 050120 below
(earlier EQ)
7. Amplifier Distortion
7.1 Apply a 50Hz, 1kHz and 10kHz signal
to the input of the amplifier at a level to
obtain an output according to the following
table. The distortion measured at the output
should be less than 0.4% at 50Hz and
1kHz and less than 1.0% at 10kHz.
TEST PROCEDURES
8. Hum
8.1 Short all inputs to input ground. The
hum measured at the output should be less
than 4mVrms, "C" weighted.
9. Noise
9.1 Short all inputs to input ground. The
noise measured at the output should be
less than 3mVrms, "A" weighted.
10. Common Mode Rejection Ratio
(CMRR)
10.1 Connect the positive side of a signal
generator to the positive and negative side
of the XLR amplifier input. Apply a 3.0Vrms
60Hz and then a 1kHz signal. Reference a
dB meter to the applied signal.
10.2 The output should be less than
-40dB.
Frequency Output Tolerence
30Hz 0.2dB
±
2.5dB
50Hz 17.1dB
±
1.5dB
90Hz 12.6dB
±
1.5dB
150Hz 11.2dB
±
1.5dB
350Hz 4.9dB
±
1.5dB
1kHz Reference -
4kHz 14.7dB
±
2.7dB
7kHz 13.0dB
±
2.7dB
13kHz 22.0dB
±
5.0dB
20kHz 14.8dB
±
3.0dB
Frequency Output Tolerence
30Hz -4.6dB
±
4.0dB
50Hz 13.5dB
±
1.8dB
90Hz 10.0dB
±
1.8dB
150Hz 11.2dB
±
1.8dB
350Hz 4.7dB
±
2.0dB
1kHz Reference -
4kHz 14.8db
±
3.0dB
7kHz 14.7dB
±
3.0dB
13kHz 25.4dB
±
5.5dB
20kHz 16.5dB
±
4.0dB
Variation Output
Power
Reference
Voltage
Load
100V 300W 70Vrms 16
Ω
120V 450W 85Vrms 16
Ω
240V 450W 85Vrms 16
Ω