Rolls RPQ160 User Manual
0
LEVEL
WIDTH
12k
6k
4k
FREQ
2k
900
0
WIDTH LEVEL
7k
3.3k
2.1k
FREQ
800
0
WIDTH
1.8k
1.1k
800
FREQ
300
166 400
0
WIDTH LEVEL
900
600
400
FREQ
200
100
0
LEVEL
10
6
4
HIGH SHELF
2
200
50 100
LOW SHELF
30
20
RPQ160 Parametric Equalizer
The RPQ160 is a four-band parametric equalizer for the professional audio installation and
music market. The unit is housed in a steel painted 1U rack space chassis, has an internal
power supply, and is designed to withstand the rigors of road use.
Each frequency band has a variable Frequency select control which adjusts the frequency
center, a Width (Q) control which varies the shape of the equalization curve, and a +/- 15 dB
Level control. Additional frequency control has been provided with variable High and Low
pass shelving filters. An overall Level control, a Bypass switch, and a Power LED round out
the front panel.
PWR
+15-15
OCT
3.3
20k
HZ
600
+15-15
OCT
3.3
10k
HZ
300
+15-15
OCT
3.3
HZ
150 3k
+15-15
OCT
3.3
1.5k
HZ
70
CLIP
+12
dB dB dB dB dB
-12
30
KHZ
1
1.5
400
500
HZ
16
ACTIVE
OUTPUT
RISQUE DE CHOC - NE PAS ENLEVER
SERIAL NUMBER
INPUT
Since equalization is used on virtually every type of audio signal and in many various applications, the RPQ160 has RCA, 1/4" and XLR inputs and outputs provided on the rear panel.
A parametric equalizer, unlike conventional graphic equalizers, provides for the precise control over the frequency selection, band width and levels. The RPQ160 is a powerful tool when
used for room equalization, sound reinforcement, or home or studio recording applications.
FEATURES:
Four bands of parametric equalization
+/- 15 dB of Boost/Cut for each frequency
RCA, 1/4" and XLR inputs and outputs
Adjustable high and low shelving filters
NRTL/C
DO NOT EXPOSE THIS EQUIPMENT TO RAIN
OR MOISTURE. TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT NOT REMOVE BACK. NO USER SERVICABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL
WARNING:
DO NOT OPEN
CAUTION
RISK OF ELECTRIC SHOCK
"T" Filters, which avoid the complexity and distortion of state-variable filters
O dB
20
Frequency (Hz)
Set at 16Hz
10
20
Frequency (Hz)
LOW SHELF SWEEP DIAGRAM
20
15
10
5
-5
-10
-15
Amplitude, 5 dB/division
-20
50
100
Frequency (Hz)
Set at 30 khz
Set at 1 khz
320
640
100
40
12k
4k
20k
HIGH SHELF SWEEP DIAGRAM
Set at 500 Hz
40
200
160
80
600
320
1k
640
2k
12k
6k
16k
40k
10k
20k
The t wo shelving filters are designed to tailor the frequency response of the signal; the
Low Shelf cuts the frequencies 3 dB at the
control's indicated setting and rolls off below, and the High Shelf cuts the frequencies
3dB at the indicated setting and rolls off
above.
The Low Shelf Sweep Diagram shows the re-
O dB
sponse curve of the Low Shelf filter at its
minimum and maximum setting.
The High Shelf Sweep Diagram shows the
response curve of the High Shelf filter at its
minimum and maximum setting.
Shown to the left is a typical symmetrical
response curve of a swept parametric band
filter with the Frequency cont rol 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
spect rum, they simply shift to whatever frequency setting is indicated by t he Frequency
control.
20k
120 VAC
50/60 Hz 15 VA
MADE IN U.S.A.
ROLLS Coporation
5143 South Main Street, Salt Lake City, UT, 84107
(801) 263-9053 FAX (801) 263-9068
rolls@rolls.com • www.rolls.com
SPECIFICATIONS
CONTROLS MAIN SECTION
Master Level: -12 to +12 dB
Low Shelf: 16 to 500 Hz High-pass filter
High Shelf: 1 to 30 kHz Low-pass filter
Active Switch: Activates/bypasses equalization circuitry
CONTROLS FREQUENCY SECTIONS
Frequency Controls: 70Hz to 1.5khz
150Hz to 3kHz
300Hz to 10kHz
600Hz to 20kHz
Width: .3 to 3 Octaves each band
Level: -15 to +15 dB each band
Frequency Response: 16 Hz to 30 kHz +/-3 dB
THD: <.03%
S/N Ratio: >90 dB
Max Input: +22 dB
Max Output: +22 dB
Input Impedance: 10KΩ (20K balanced)
Output Impedance: 50Ω
Shelving Slope: 12 dB / Octave
Size: 19" x 6" x 1.75"
(48.3 x 15.2 x 4.5 cm)
Weight: 5 lbs. (2 kg)
ARCHITECTURAL AND ENGINEERING SPECIFICA TIONS
The active parametric equalizer shall be a single channel device that provides four independent bands of proportional-Q type filtering. There shall also be separate
high-pass and low-pass shelving filters. The unit shall
have an internal power supply capable of operating from
120 to 240 VAC, 50/60Hz line. The voltage selection
shall be internally selectable via transformer primary
winding configuration. Front panel LEDs shall indicate
signal clipping, and power status.
The equalizer shall utilize four filter bands. Each band
shall have a +/-15 dB of boost or cut of the following
frequency ranges; 70 Hz to 1.5 kHz, 150 Hz to 3 kHz,
300 Hz to 10 kHz, and 600 Hz to 20 kHz. Each frequency select control shall be accurate to within 10%
of the indicated setting. The width (Q) control for each
frequency range shall be continuously variable from .3
to 3 octaves. The high shelving filter shall have an attenuation rate of 12 dB per octave and shall have a variable frequency selection from 1 kHz to 30 kHz. The
low shelving filter shall have an attenuation rate of 12
dB per octave and have a variable selection from 16 Hz
to 500 Hz. The equalization circuitry shall be engaged
via a front panel switch.
The active parametric equalizer shall have a frequency
response +/- 3dB from 16Hz to 30 kHz (EQ bypassed).
The total harmonic distortion shall not exceed .03%.
The equalizer shall accept a maximum input level of
+22 dB, and shall allow a maximum output of +22dB.
A front panel clip LED shall indicate a signal reaching
3 dB below clipping. The inputs shall be unbalanced
RCA and 1/4", and a balanced XLR type with impedances of 10K ohms and 20K ohms respectively. The
outputs shall be unbalanced RCA and 1/4", and balanced XLR with impedances of 50 ohms.
The equalizer shall be 19" wide by 6" deep by 1.75"
high and shall weigh 5 pounds. It shall have a connected
power cable and shall be CE and CSA approved
The equalizer shall be the Rolls RPQ160 Parametric
Equalizer.
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