20
measurement.
5.3 3-WAY SYSTEM LEVEL SETTING
Properly setting level guarantee best performing system. Please follow the recommended procedure for best
speaker system.
1. All system power off.
2. Connect the pink noise generator (on RTA or CD), the signal source required by the test instrument and
function generator onto the main mixer.
3. Connect the measurement microphone to the instrument.
4. Make sure all the signal wiring is done properly setting on PCR2213 is done correctly.
5. Graphic equalizer at flat setting (or bypass).
6. Compressor/limiter at bypass setting.
7. All level control on power amplifiers at minimum.
8. Un-mute all output of PCR2213.
9. Turn on the system except power amplifiers.
10. Connect AC voltmeter at the LF output of the PCR2213 under test.
11. Make sure all mute switches and phase invert switches are not pressed. The limiter is off, subsonic filter
is off and the horn EQ is not engaged.
12. Set the LF/MF crossover point [8] as design, send in the sine wave from function generator at half of the
crossover frequency. Adjust the channel fader and master fader to 0VU on the mixer.
13. Read the AC voltmeter, it should be around 0dBu depending on the 0VU reference point of the mixer and
the crossover point.
14. Change the frequency of the function generator to the crossover point.
15. Adjust the LF/MF crossover frequency knob [8] slowly around the crossover frequency. Read the AC
voltmeter until it is 3dB lower than previous step. This is the exact position of the crossover point. Mark
the position with a pencil.
16. Connect the HF output to AC Voltmeter.
17. Set the MF/HF crossover point [8] as design, send in the sine wave from function generator at 2X of the
crossover frequency. Adjust the channel fader and master fader to 0VU on the mixer.
18. Read the AC voltmeter, it should be around 0dBu depending on the 0VU reference point of the mixer.
19. Change the frequency of the function generator to the crossover point.
20. Adjust the MF/HF crossover frequency knob [8] slowly around the crossover frequency. Read the AC
voltmeter until it is 3dB lower than previous step. This is the exact position of the crossover point. Mark
the position with a pencil.
21. Measure the axis distance between the MF speaker and high HF driver (speaker), and calculate the
approximate delay time to compensate the difference. Ref to 5.3 for detail.
22. Now, shut down all signal sources. Make sure there is no output from the mixer by reading the level meter
on the mixer.
23. Press down all the mute switches of PCR2213 excepts the HF output(s).
24. Turn on only the HF power amplifier with input level at minimum.
25. Send in the pink noise to the mixer, adjust the level until reaching 10dB.
26. Slowly turn up the level control of the HF power amplifier, make sure you are listening the HF sound
clearly from the HF speakers. If you heard fussy HF sound from the bass or mid speakers (It is hard to tell
MF coming from MF or LF speakers), turn off the system and check system wiring thoroughly. It is highly
possibly that the LF or MF signal was sent into HF speaker. If you turn on the LF first, HF speaker will be
blown already.
To Next Page
Loading...
