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Required Items:
• Audio Signal Generator
• dB Meter
• Audio Precision AUX-0025 digital filter
• CC1 Zone Controller - see page 12 for P/N
• 4 - 4 Ohm, 300W load resistors
• 4 - 16 Ohm, 300W load resistors
• 4 - 32 Ohm, 300W load resistors
Test Setup:
Set the PS604 rear panel controls as listed
below for following tests.
• Rotary EQ switch to position 1 FLAT
• Output Attenuation to MAX (fully CW)
• DIP switch setting: all switches to LEFT
Note: The AP AUX-0025 filter must be used
for all measurements.
1. Gain Test - Low-Z Mode
1.1 Set the Output 1 - 4 DIP switches to
Low-Z mode (right).
1.2 Connect 4 Ohm, 300 W loads to the
channel 1 - 4 outputs.
1.3 Apply a 1 kHz, -19.3 dBV input to the
channel 1 - 4 inputs.
1.4 Measure the output level at the channel 1
- 4 outputs. It should be +13 dBV +/- 1 dBV.
2. Gain Test - Hi-Z 70V Mode
2.1 Set the Output 1 - 4 DIP switches to Hi-Z
mode (left). Set the GLOBAL OUT DIP
switch to 70V (left).
2.2 Connect 16 Ohm, 300 W loads to the
channel 1 - 4 outputs.
2.3 Apply a 1 kHz, -19.3 dBV input to the
channel 1 - 4 RCA inputs.
2.4 Measure the output level at the channel
1 - 4 outputs. It should be +16 dBV +/- 1 dBV.
4. Gain Test - Input Sensitivity,
100V and 70V Settings
4.1 Set the Output 1 - 4 DIP switches to Hi-Z
mode (left). Set the GLOBAL OUT DIP
switch to 100V (right). Set the SENSITIVITY
DIP switch to 12 dBu (right).
4.2 Connect 32 Ohm, 300 W loads to the
channel 1 - 4 outputs.
4.3 Apply a 1 kHz, -19.3 dBV input to the
channel 1 - 4 inputs.
4.4 Measure the output level at the channel
1 - 4 outputs. It should be +11 dBV +/- 1 dBV.
4.5 Set the SENSITIVITY switch to the
4 dBu position.
4.6 Apply a 1 kHz, -19.3 dBV input to the
channel 1 - 4 inputs.
4.7 Measure the output level at the channel
1 - 4 outputs. It should be +19 dBV
+/- 1 dBV.
5. THD+N Test
5.1 Set the Output 1 - 4 DIP switches to
Hi-Z mode (left). Set the GLOBAL OUT DIP
switch to 100V (right). Set the SENSITIVITY
DIP switch to 4 dBu (left).
5.2 Connect 32 Ohm, 300 W loads to the
channel 1 - 4 outputs.
5.3 Apply a 1 kHz, -19.3 dBV input to the
channel 1 - 4 inputs.
TEST PROCEDURES
PS604 Amplifier