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

±2.7dB

±5.0dB

3.0dB

Tolerence

4.0dB

1.8dB

2.0dB

±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.