Bose L1 Compact - Page 46

Test Procedures
3.6 Measure the output level at the
1/4” balanced line output jack. It should be
0dBV +/- 1dBV (1Vrms).
3.7 Measure the output level at the unbal-
anced RECORD output RCA jacks. It should
be -6dBV +/- 1dBV (0.5Vrms).
3.8 Repeat steps 3.5 to 3.7 for the channel
2 1/8” stereo input jack.
4. Channel 1 EQ Frequency Response
Test
4.1 Set the channel 1 volume control to
maximum (fully CW). Set the bass and treble
tone controls to 12 o’clock (straight up).
4.2 Apply a balanced 1kHz, -55dBV
(1.8mVrms) sine wave to the XLR micro-
phone input.
4.3 Measure the output level at the 1/4”
balanced Main output on the back of the
power stand. It should be -4.5dB +/- 1.5dB
(0.6Vrms).
4.4 Reference a dB meter to the output
level at 1 kHz. Ensure that the frequency
response is within the limits listed in the
following table.
5. Channel 2 ToneMatch Not Active EQ
Check
5.1 Set the channel 2 volume control to the
12 o’clock position. Set the ToneMatch
switch to the OFF position (down).
5.2 Using a balanced TRS cable, apply a
50HZ, -50dBV (3.16mVrms) sine wave to the
1/4” balanced TRS input jack.
5.3 Sweep the audio input from 50Hz to
15kHz. Measure the output level at the Main
output jack on the back of the power stand
using a balanced TRS cable. Verify that the
audio bandwidth is 50Hz to 15kHZ, +/- 1dB.
6. Channel 2 ToneMatch Active EQ Fre-
quency Response Test
6.1 Set the channel 2 volume control to the
MAXIMUM (fully CW) position. Set the
ToneMatch switch to the ON position (up).
6.2 Using a balanced TRS cable, apply a
1 kHZ, -40dBV (10mVrms) sine wave to the
1/4” balanced TRS input jack.
6.3 Measure the output level at the 1/4”
balanced Main output on the back of the
power stand. It should be -2.8dB +/- 1.5dB
(0.72Vrms).
6.4 Reference a dB meter to the output level
at 1 kHz. Ensure that the frequency re-
sponse is within the limits listed in the follow-
ing table.
Frequency Output Level
74 Hz -3.9 dBr +/- 1.5 dB
120 Hz +1.2 dBr +/- 1.5 dB
250 Hz +2.3 dBr +/- 1.5 dB
515 Hz -4.0 dBr +/- 1.5 dB
725 Hz -5.0 dBr +/- 1.5 dB
1 kHz REFERENCE
2 kHz +3.1 dBr +/- 1.5 dB
4 kHz +4.0 dBr +/- 1.5 dB
7 kHz +3.8 dBr +/- 1.5 dB
14 kHz -3.9 dBr +/- 1.5 dB
Frequency Output Level
50 Hz -11.1 dBr +/- 2.0 dB
65 Hz -5.4 dBr +/- 1.5 dB
100 Hz +0.9 dBr +/- 1.5 dB
150 Hz -1.0 dBr +/- 1.5 dB
300 Hz -4.4 dBr +/- 1.5 dB
550 Hz -6.6 dBr +/- 1.5 dB
1 kHz REFERENCE
1.5 kHz +2.5 dBr +/- 1.5 dB
3 kHz +5.5 dBr +/- 1.5 dB
10 kHz +2.6 dBr +/- 1.5 dB
18 kHz +0.2 dBr +/- 2.0 dB
46