background image

22

3.

Turn the threshold all the way up, and switch on limiters.

4.

Let’s start from the HF output.

5.

Turn up the mixer master level until the HF power channel reached the threshold power you want to limit.

6.

Turn down the threshold until the HF limiter indicator lighted. Now you have done the first limiter point.
There are 3 more (or 2 more ) to go.

7.

If you keep all the output levels on PCR2213 at 0 (12 o’clock), the LF output of the same channel prob-
ably reached limitng at the same time. But the power amplifier level maybe higher or lower than the power
you wish to limit. If the limiting point is not yet reached, increase the mixer output level until the limiter
indicator is lighted. If it was too high already, bring down the mixer output level until the limiter indicator
just start to light.

8.

Mark the output level at this point by measuring with AC voltmeter.

9.

Turn up the level control of the power amplifier channel until it reached the level you wish to limit.

10. Turn down the output level of PCR2213 until the power amplifier output level reduced back to the level

marked in step 8. Now, this output limiter is done.

11. Repeat the same procedure for other output limiter.
12. After all limiter points are set, connect all the speaker loads back and send in the pink noise via the mixer

again at –20dB (or –30dB) refer to previous level.

13. Measure the HF amplifier channel used for previous setup and write down the value.
14. Measure the other HF amplifier channels and adjust them as the same as the write down value.
15. Measure the LF amplifier channel used for previous setup and write down the value.
16. Measure the other LF amplifier channels and adjust them as the same as the write down value.

5.6  SUB 

In case the PCR2213 is used to work with sub-woofer system, no matter mono or stereo, it is good idea to drive
all the sub-woofer boxes in the same phase with identical signal. Keep those sub-woofers the identical design
with identical boxes and drivers at all possible.
Slide the sub sigma switch will sum the 2 LF output of PCR2213 in stereo mode and send out the signal from
both LF output jacks. This function will be automatically dis-engaged when the mode is set in MONO instead of
STEREO.
This practice is true no matter it is a big stage installation or small in studio monitoring.

5.7  HORN EQ

30 years ago, the horn designs could not reach constant dispersion over the frequency range it covers. The
higher the frequency, the narrower the covering area.
20 years ago, the design of constant directivity can be realized, so that the energy can be distributed wider
area especially in higher frequency. This expose a problem not noticeable in the past, because the high
frequency energy output from the driver will drop gradually as the frequency goes higher. It was not a problem
on axis before these constant directivity horns invented, and compensated with the beaming characteristic of
older horn.
But to take good care of the audience in various venues, constant directivity design provides much better
performance between on axis versus off axis.
To compensate this roll-off tendency, PCR2213 provides a HORN EQ switch which will boost +12dB at 15KHz
with a 6dB/oct slope. This is a generic curve and work fine with most constant directivity horns, however fine
tune may be needed with 1/3 octave equalizer.

Summary of Contents for PCR2213

Page 1: ...PHONIC PCR2213 PHONIC PCR2213 PHONIC PCR2213 PHONIC PCR2213 PHONIC PCR2213 USER MANUAL...

Page 2: ...hting storms or when unused for long periods of time 14 Refer all servicing to service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug...

Page 3: ...WOOFER 8 2 4 STEREO ACTIVE 2 WAY WITH SUB WOOFER 9 2 5 STEREO ACTIVE 3 WAY WITH SUB WOOFER 10 2 6 4 WAY 5 WAY 10 3 0 INSTALLATION 11 3 1 RACK MOUNTING 11 3 2 CONNECTORS 11 3 2 1 IMPEDANCE 11 3 2 2 UN...

Page 4: ...Y ETF OR TEF FFT OR MLSSA INCLUDING A SOUND PRESSURE LEVEL METER 18 5 1 3 FUNCTION GENERATOR WITH FREQUENCY DISPLAY 18 5 1 4 AC VOLTMETER 18 5 1 5 YOUR FAMILIAR CDS 18 5 2 2 WAY SYSTEM LEVEL SETTING 1...

Page 5: ...it is positioned before the power amplifiers Then the power amplifier send the signal directly to the high or low frequency speakers directly without the passive crossover inserted The benefit are Mo...

Page 6: ...eshooting LED indication on all important switching functions for easy status identification Crossover frequencies continuously variable from 80 8000 Hz Time phase alignment via polarity switches and...

Page 7: ...points are listed for your reference your components will fall in the recommended range mostly but exception exists 2 1 2 WAY SYSTEM Ref Figure 1 PCR2213 is capable of dual 2 way system in stereo mode...

Page 8: ...0 0 0 3 0 1 5 6 3 e m o D 2 1 r o t i n o M 0 0 0 1 0 0 5 0 0 0 8 0 0 0 3 2 2 3 WAY SYSTEM Ref Figure 2 PCR2213 is capable of single 3 way speaker system with one unit The low mid and mid high crosso...

Page 9: ...VER SUB WOOFER Ref Figure 3 PCR 2213 is very suitable for sub woofer application and is capable of this system with one unit The cross over frequency is always low at 80 200Hz Following a table to lis...

Page 10: ...hieve 1 Treat it as 3 way and do it as the same as 2 2 2 Treat it as 2 way plus sub woofer as the same as 2 1 2 3 The later configuration benefit the summed sub woofer output from both channels and th...

Page 11: ...channel you will need four PCR 2213 2 Treat it as 3 way plus sub woofer as the same as 2 2 2 3 and you are using three PCR 2213 for the whole system The later configuration benefit the summed sub woof...

Page 12: ...ors in series with pin 2 and 3 3 2 2 Unbalanced Balanced Connection Most of the mistakes in audio installations are incorrect and defective audio connections In order to perfectly complete your instal...

Page 13: ...wer resistance and better distribution than signal ground If there is hum a very possible cause is bad grounding connection in the system In case you can not find the cause try to connect the ground p...

Page 14: ...fail to make this connection at all The audio ground of the PCR2213 is capacitor de coupled and isolate it from the power ground Do not attempt to solve ground loop problem by disconnecting the power...

Page 15: ...re flashing at all possible 3 3 3 3 3 LOW level control These 2 knobs control the output level 6 dB of LOW portion for the user to set proper level in association with HIGH level controls 10 When in m...

Page 16: ...cy range is cut into 2 for more precision control 80 to 800Hz is the x1 range and 800Hz to 8KHz is the x10 range 2 LED are incorporated to show the selected range 10 10 10 10 10 HIGH These 2 knobs con...

Page 17: ...fessional products sub sonic shall be cut to avoid excessive excursion The low cut point is at 30Hz Please do keep it engaged except you need the very low frequency There is almost nothing below 30Hz...

Page 18: ...ID output 22 22 22 22 22 HIGH 1 HIGH 2 These are the HIGH outputs In MONO mode HIGH 1 is not in used HIGH 2 is the HIGH output 23 23 23 23 23 SUB When set this switch to the left the low portions of t...

Page 19: ...by ordinary RTA but it is a handy tool to do some quick job and in near field measurement For more precision alignment ETF TEF or MLSSA is recommended Please refer to the user guides of the instrument...

Page 20: ...sure the axis distance between the bass speaker and high frequency driver speaker and calculate the approximate delay time to compensate the difference Ref to 5 3 for detail 18 Now shut down all signa...

Page 21: ...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 gen...

Page 22: ...4 DELAY TIME The speed of sound is affected by air temperature You can calculate the sound speed as following C 49 459 4 F 1 2 in feet per second C 20 6 273 C 1 2 in meter per second Where C is the sp...

Page 23: ...ed for previous setup and write down the value 16 Measure the other LF amplifier channels and adjust them as the same as the write down value 5 6 SUB In case the PCR2213 is used to work with sub woofe...

Page 24: ...6 0 TYPICAL CONNECTING LEADS 23...

Page 25: ...u p t u o d n a n o i t c e s F L l e n n a h c o e r e t s h t o b m u S r o t a c i d n i h t i W e d o m o n o M n i d e t a e f e d R E T L I F e p y T r e t l i f y e l i R z t i w k n i L t c o...

Page 26: ...25 8 0 System Block Diagram...

Page 27: ...Advice The Musician s Guide to the Recording Studio by Wayne Wadham Schirmer Books ISBN 0 02 872694 4 Professional Microphone Techniques by David Mills Huber Philip Williams Hal Leonard Publishing Cor...

Page 28: ...6103 Johns Road 7...

Page 29: ......

Reviews: