Test Procedures; Amplifier Test Procedures - Bose 1800-V Manual

1. Full Power Distortion
Use the following test conditions for measuring distortion in Sections 1.1 and 1.2:
• Connect the signal source to the CH1 or CH2 inputs
• Set the signal source to output 1.5
Sensitivity
• Set the CH1 and CH2 Level Controls to the full on position (full clockwise)
• The voltage at the amplifier's outputs shall be a least: 60 Vrms into 8
• Connect a 30 kHz low-pass filter to the measurement equipment
1.1 Full Power Distortion: While following the test conditions outlined above, the total harmonic
≤
distortion should be
1.2 Low Level Distortion: Set the CH1 and CH2 Level Controls to obtain 6.25 Vrms
the speaker outputs. The total harmonic distortion for all outputs should be
2. Frequency Response
2.1 Apply a 1 kHz signal to CH1 and CH2, and adjust the output to 6Vrms.
2.2 Reference a dB meter to the CH1 or CH2 output.
2.3 Measure the response according to the following table:
Frequency
20 Hz
20 kHz
3. DC Offset
Take this measurement without applying a source signal.
3.1 Connect a DC meter to the amplifier's output.
≤
3.2 There should be

TEST PROCEDURES

AMPLIFIER TEST PROCEDURES

±
.1 Vrms @ 1 kHz Low Sensitivity, .775Vrms High
.5% @ 1 kHz for all amplifier outputs.
Output
± .75 dB
± .75 dB
50 mVDC at the amplifier output.
29
Ω Ω
; 50 Vrms into 4
±
1% across 4
≤
0.1%.
Ω
at