Bose F1 812 Service Manual

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TEST PROCEDURES
8.3 Measure the output gain and THD+N levels at the J4 (upper woofer) and J5 (lower woofer)
connectors. Ensure they are as specified in the below table.
9. Front LED Test
9.1 Verify front baffle LED operation by switching from OFF-LIMIT-POWER. The Blue LED
located at the lower right corner of the enclosure should be illuminated with the same intensity
in both the LIMIT and POWER settings.
9.2 Apply a balanced 100 Hz, +20 dBu signal to the Input 1 XLR connector. Slowly increase the
input signal level above +20 dBu. Verify that the Signal/Clip LED now turns RED.
9.3 Move the Front LED switch to the LIMIT position. After about 3 seconds, it should get brighter
and a little wider to indicate that the input limit has been reached. Remove the input signal. Verify
that the Front LED returns to the same intensity as when the switch is in the POWER position.
Input
Frequency
J4 (Upper Woofer)
Output Levels
J5 (Lower Woofer)
Output Levels
20 Hz Bass Out < 0 dBu Bass Out < 0 dBu
30 Hz Bass Out = 14.5dBu +/-1dB Bass Out = 14.5dBu +/-1dB
30 Hz THD+N < 0.5% THD+N < 0.5%
40 Hz Bass Out = 26.8dBu +/-1dB Bass Out = 26.8dBu +/-1dB
40 Hz THD+N < 0.1% THD+N < 0.1%
50 Hz Bass Out = 30.6dBu +/-1dB Bass Out = 30.6dBu +/-1dB
50 Hz THD+N < 0.1% THD+N < 0.1%
60 Hz Bass Out = 28.6dBu +/-1dB Bass Out = 28.6dBu +/-1dB
60 Hz THD+N < 0.1% THD+N < 0.1%
70 Hz Bass Out = 26.2dBu +/-1dB Bass Out = 26.2dBu +/-1dB
70 Hz THD+N < 0.1% THD+N < 0.1%
80 Hz Bass Out = 24.2dBu +/-1dB Bass Out = 24.2dBu +/-1dB
80 Hz THD+N < 0.1% THD+N < 0.1%
90 Hz Bass Out = 22.3dBu +/-1dB Bass Out = 22.3dBu +/-1dB
90 Hz THD+N < 0.5% THD+N < 0.5%
100 Hz Bass Out = 20.1dBu +/-1dB Bass Out = 20.1dBu +/-1dB
100 Hz THD+N < 0.5% THD+N < 0.5%
140 Hz Bass Out = 8.3dBu +/-1dB Bass Out = 8.3dBu +/-1dB
140 Hz THD+N < 0.5% THD+N < 0.5%
200 Hz Bass Out = 3.9dBu +/-1dB Bass Out = 3.9dBu +/-1dB
200 Hz THD+N < 0.5% THD+N < 0.5%
500 Hz Bass Out < 0 dBu Bass Out < 0 dBu
1 KHz Bass Out < 0 dBu Bass Out < 0 dBu
2 KHz Bass Out < 0 dBu Bass Out < 0 dBu
5 KHz Bass Out < 0 dBu Bass Out < 0 dBu
10 KHz Bass Out < 0 dBu Bass Out < 0 dBu
20 KHz Bass Out < 0 dBu Bass Out < 0 dBu

Bose F1 812 Specifications

General

Type	Powered Speaker
Power Rating	1000W
Maximum SPL	132 dB
Dimensions	664 x 334 x 372 mm
Weight	20.2 kg
LF Driver Size	12"
Enclosure Material	Composite
Inputs	2 x XLR-1/4" combo
Outputs	XLR
Mounting Options	Pole mount
HF Driver Size	8 x 2.25" high-output mid-high drivers