Bose ACOUSTIMASS PRO Manuale - Pagina 8
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Use for serial numbers 050121 and above
(later EQ)
Frequency
Output
30Hz
0.2dB
50Hz
17.1dB
90Hz
12.6dB
150Hz
11.2dB
350Hz
4.9dB
1kHz
Reference
4kHz
14.7dB
7kHz
13.0dB
13kHz
22.0dB
20kHz
14.8dB
Use for serial numbers 050120 below
(earlier EQ)
Frequency
Output
30Hz
-4.6dB
50Hz
13.5dB
90Hz
10.0dB
150Hz
11.2dB
350Hz
4.7dB
1kHz
Reference
4kHz
14.8db
7kHz
14.7dB
13kHz
25.4dB
20kHz
16.5dB
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.
Variation
Output
Power
100V
300W
120V
450W
240V
450W
TEST PROCEDURES
Tolerence
±
2.5dB
±
1.5dB
±
1.5dB
±
1.5dB
±
1.5dB
-
±2.7dB
±2.7dB
±5.0dB
±
3.0dB
Tolerence
±
4.0dB
±
1.8dB
±
1.8dB
±
1.8dB
±
2.0dB
-
±3.0dB
±3.0dB
±5.5dB
±
4.0dB
Reference
Load
Voltage
70Vrms
16Ω
85Vrms
16Ω
85Vrms
16Ω
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.
8