Rolls DJ Equipment RPQ160b User Guide

RPQ160b  
Parametric Equilizer  
LOW SHELF  
50 100  
HIGH SHELF  
LEVEL  
0
FREQ  
800  
FREQ  
2.1k  
FREQ  
400  
LEVEL  
0
LEVEL  
0
WIDTH  
WIDTH  
4
6
200  
100  
600  
900  
300  
166  
1.1k  
1.8k  
800  
400  
3.3k  
7k  
200  
30  
20  
2
10  
1.5  
400  
500  
MADE IN USA  
CLIP  
16  
1
30  
KHZ  
-12  
+12  
70  
1.5k  
-15  
+15  
150  
3k  
-15 +15  
dB  
300  
10k  
3
.3  
OCT  
3
.3  
OCT  
HZ  
HZ  
dB  
dB  
HZ  
HZ  
ACTIVE  
EVEL  
0
FREQ  
800  
LEVEL  
0
FREQ  
2.1k  
LEVEL  
0
FREQ  
4k  
LEVEL  
0
WIDTH  
WIDTH  
WIDTH  
300  
166  
1.1k  
800  
400  
3.3k  
7k  
2k  
6k  
12k  
PARAMETRIC  
EQUALIZER  
1.8k  
900  
RPQ160b  
+15  
150  
3k  
-15  
+15  
300  
10k  
-15  
+15  
600  
20k  
-15  
+15  
3
.3  
OCT  
3
.3  
OCT  
3
.3  
OCT  
dB  
HZ  
dB  
HZ  
dB  
HZ  
dB  
POWER  
Rolls Corporation  
Salt Lake City, UT  
06/09  
QUICK START OPERATION GUIDE  
 
DESCRIPTION  
DESCRIPTION  
REAR PANEL  
FRONT PANEL  
LOW SHELF  
50 100  
HIGH SHELF  
LEVEL  
0
FREQ  
800  
FREQ  
2.1k  
FREQ  
400  
LEVEL  
0
LEVEL  
0
WIDTH  
WIDTH  
4
6
200  
100  
600  
900  
300  
166  
1.1k  
800  
400  
200  
30  
20  
2
10  
WARNING DO NOT EXPOSE THIS  
EQUIPMENT TO RAAIN OR MOISTURE.  
TO REDUCE THE RISK OF ELECTRIC  
SHOCK DO NOT REMOVE BACK.  
NO USER SERVICAABLE PPARTS  
INSIDE. REFER SERVVICING TO  
QUALIFIED SERVICEE PERSOONNEL.  
SERIAL NUMBER  
1.8k  
1.5  
400  
500  
MADE IN USA  
MADE IN USA  
CLIP  
ROLLS  
16  
1
30  
KHZ  
-12  
+12  
70  
1.5k  
-15  
+15  
150  
3k  
-15 +15  
dB  
300  
HZ  
3
.3  
OCT  
3
.3  
OCT  
HZ  
dB  
dB  
HZ  
HZ  
ACTIVE  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
+
-
BALLANCED  
RISQUE DE CHOC - NE PAS ENLEVER  
PS12  
L
FREQ  
800  
LEVEL  
0
FREQ  
2.1k  
LEVEL  
0
FREQ  
4k  
LEVEL  
0
WIDTH  
WIDTH  
WIDTH  
300  
166  
1.1k  
1.8k  
800  
400  
3.3k  
7k  
2k  
900  
6k  
PARAMETRIC  
EQUALIZER  
12k  
RPQ160b  
OUTPUTS  
INPUTS  
+15  
150  
3k  
-15  
+15  
300  
10k  
-15  
+15  
600  
20k  
-15  
+15  
dB  
3
.3  
OCT  
3
.3  
OCT  
3
.3  
OCT  
HZ  
dB  
HZ  
dB  
HZ  
POWER  
BALLANCED 1/4”  
BALLANCED 1/4”  
LOW SHELF: High Pass Filter control; adjusts the amount of low frequency rolloff  
from 500 Hz down to 16Hz for the entire output of the RPQ160.  
HIGH SHELF: Low Pass Filter control; adjusts the amount of high frequency rolloff  
from 1 kHz up to 20 kHz for the entire output of the RPQ160.  
NOTE: THERE IS NO BYPASS SWITCH FOR THE LOW OR HIGH SHELF  
FILTERS - SIMPLY TURN THE LOW SHELF COMPLETELY COUNTERCLOCK-  
WISE, AND THE HIGH SHELF COMPLETELY CLOCKWISE TO BYPASS THESE  
CIRCUITS.  
OUTPUT: Balanced XLR and balanced 1/4” and RCA jacks for connection to a  
mixing board, power amplifier or recording device.  
INPUT: Balanced XLR and balanced 1/4” and RCA jacks for connection to the  
output of a mixing board, instrument, or other device with the signal to be pro-  
cessed.  
LEVEL: Adjusts the overall signal level of the RPQ160.  
NOTE:The following three descriptions are identical for all four bands of equaliza-  
tion.  
FREQUENCY: Selects the frequency to be boost or cut. The band frequency  
ranges are listed below:  
CONNECTION  
Band 1:  
Band 2:  
Band 3:  
Band 4:  
70 Hz to 1.5 kHz  
150 Hz to 3 kHz  
300 Hz to 10 kHz  
600 Hz to 20 kHz  
Turn off all equipment before making any connections. Mount the RPQ160 in a  
properly grounded rack, and make sure the rack is properly ventilated. Ambient  
temperatures should not exceed 113 degrees F (45 degrees C) when the equip-  
ment is in use. Connect your RPQ160 using XLR, RCA or 1/4” connectors.  
Connect the AC power cord to a properly grounded AC outlet. Route the AC  
power cord away from audio lines.  
WIDTH: (Q):Varies the shape or width of the equalization being boost or cut from  
.3 to 3 octaves wide.  
LEVEL: Boosts or cuts the signal of the indicated band from -15 to +15 dB.  
Power Switch: Applies power to the RPQ160 when the unit is connected to a  
properly grounded ac outlet.The Power LED will light when the RPQ160 is on.  
 
OPERATION  
OPERATION Cont.  
Shown below is the typical symmetrical response curve of a swept parametric  
band filter with the Frequency control set at 1 kHz, the Level set at +15 and -15  
dB, and the Octave control set at .3, .5, 1, and 3.These curves remain consistent  
over the frequency spectrum, they simply shift to whatever frequency setting is  
indicated by the Frequency control.  
The two shelving filters are designed to roll off the frequency response of the  
Signal; the Low Shelf cuts the frequencies 3 dB at the controls indicated setting  
and rolls off below, and the High Shelf cuts the frequencies 3 dB at the indicated  
setting and rolls of above.The Low Shelf Sweep Diagram shows the response  
curve of the Low Self filter at its minimum and maximum setting.  
The shape is most narrow when the OCT control is set at .3, and is widest at the  
3 setting.  
O dB  
Set at 16Hz  
20  
15  
10  
5
Set at 500 Hz  
20 40 80 160 320 640 12k 16k 20k  
Frequency (Hz)  
LOW SHELF SWEEP DIAGRAM  
- 5  
-10  
-15  
-20  
The High Shelf Sweep Diagram shows the response curve of the High Self filter at  
its minimum and maximum setting.  
O dB  
Set at 30 kHz  
100 200  
Frequency (Hz)  
600 1k 2k  
6k 10k 20k  
50  
Set at 1 kHz  
20 40 80 160 320 640 12k 20k 40k  
Frequency (Hz)  
APPLICATIONS  
HIGH SHELF SWEEP DIAGRAM  
The RPQ160’s precise equalization has many applications including school or  
church gymnasiums, home or professional recording studios, live sound, or  
musical instruments.  
Please note that when the Low Shelf is set fully counterclockwise (16 Hz), the  
filter is essentially bypassed. Similarly, when the High Self control is set fully  
clockwise (30 kHz), that filter is essentially bypassed.  
When coupled with a spectrum analyzer, the RPQ160 can match exactly the  
properties of typical acoustic resonances and reflections, and make immediate  
improvements to any installed system’s amplitude and phase response.  
The Level control has a detente at the center (0 dB) position. if the Clip LED is  
lighting, the Level control may be turned counterclockwise to reduce the gain of  
the RPQ160, thereby reducing the clipping. If a weak signal is present, the Level  
control may be turned up (clockwise) to increase the gain. To achieve the  
maximum signal to noise ratio, the Level should be set 3 dB below the clipping  
level.This is done by adjusting the Level control with a normal signal present until  
the Clip LED lights, then turning the Level down to just below the point when the  
LED goes out.  
Live applications include equalizing trouble spots where a mix may be muddy, too  
harsh, flat, and even eliminate feedback precisely without affecting the flavor of  
the overall sound.  
Recording studios benefit from the RPQ160’s precise equalization in notching out  
trouble frequencies that need to beremoved, or by re-equalizing a final mix.  
 

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