Rolls REQ131 User manual

REQ131
REQ215
GRAPHIC EQUALIZERS
OWNERS MANUAL
LIMITED WARRANTY
This product is warranted to the original consumer purchaser to be free from
defects in materials and workmanship under normal installation, use and service for a
period of one (1) year from the date of purchase as shown on the purchaserís receipt.
The obligation of Rolls Corporation under this warranty shall be limited to repair
or replacement (at our option), during the warranty period of any part which proves
defective in material or workmanship under normal installation, use and service, provided
the product is returned to Rolls Corporation, TRANSPORTATION CHARGES PRE-
PAID. Products returned to us or to an authorized Service Center must be accompanied by
a copy of the purchase receipt. In the absence of such purchase receipt, the warranty
period shall be one (1) year from the date of manufacture.
This warranty shall be invalid if the product is damaged as a result of deface-
ment, misuse, abuse, neglect, accident, destruction or alteration of the serial number,
improper electrical voltages or currents, repair, alteration or maintenance by any person or
party other than our own service facility or an authorized Service Center, or any use
violative of instructions furnished by us.
This one-year warranty is in lieu of all expressed warranties, obligations or
liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR LIABILITIES,
INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MER-
CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, SHALL BE
LIMITED IN DURATION TO THE ONE YEAR DURATION OF THIS WRITTEN
LIMITED WARRANTY. Some states do not allow limitations on how long an implied
warranty lasts, so the above limitation may not apply to you.
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL, INCIDENTAL
OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR ANY OTHER
WARRANTY, EXPRESSED OR IMPLIED, WHATSOEVER. Some states do not allow
the exclusion or limitation of special, incidental or consequential damages so the above
limitation or exclusion may not apply to you. This warranty gives you specific legal
rights, and you may also have other rights which vary from state to state.
ROLLS CORPORATION
SALT LAKE CITY, UTAH
2/05
0
+12
LEVEL
16
20
30
50 100
HPF LPF
500
400
1
200
HZ KHZ
1.5
4
2
6
10
30 -12
EQ
BYPASS
PWR
20 25 31.5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.2K 1.6K 2K 2.5K 3.1K 4K 5K 6.3K 8K 10K 12.5K 16K 20K
+12
-12
+17
+10
0
-7
-13
20
Hz
kHz
10 150
3.5
6
30
+17
+10
0
-7
-13
LVL
PWR
20 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K
+12
-12
+17
+10
0
-7
-13
IN/OUT
+12
-12
LVL
IN/OUT
CHANNEL 1 CHANNEL 2
20
Hz
kHz
10 150
3.5
6
30
00
20 40 63 100 160 250 400 630 1K 1.6K 2.5K 4K 6.3K 10K 16K

INTRODUCTION
The ROLLS REQ series equalizers are intended for room equalizing or sound
shaping and the approximate frequency response curve can be seen graphically
by the settings of the frequency controls. Recording and broadcasting studios,
sound contractors and musicians will appreciate the low noise, straightforward
design, and versatile signal control of the REQ series.
INSTALLATION
Your REQ series equalizer may be installed in a standard 19î rack or placed in
any dry, well ventilated area. The 1/4î connectors are balanced with the tip being
positive (+) and the ring negative (-), or will assume an unbalanced state with
unbalanced (TS) connectors. The XLR connectors are pin 2 positive (+). The
chassis is lifted from the circuit ground (as are all ROLLS products) to help
prevent ground loops. Since there are three types of input/output connectors, one
type may be used on the input and another on the output. This helps to eliminate
the need for special cables.
FRONT PANEL
The POWER switch is on when the red portion is showing. The VOL control
provides the boost or cut settings for the input signal level. The LED bargraph
shows the actual output level in dB so the use will know when the headroom is
exhausted. EQ IN/OUT is for bypassing the equalizer circuits. The HPF and LPF
controls are shelving filters , their 3dB down frequencies are indicated on the
dials. For widest bandwidth, the HPF should be on 10Hz and the LPF should be
set to 30 kHz. Frequency band slider controls cut or boost the indicated frequency
by +/- 12 dB for the REQ131, or +/- 6 dB for the REQ215. When the slider is in
the center or detented position, the frequency is left unmodified.
REAR PANEL
The rear panel contains the XLR, 1/4î, and RCA input and output jacks. Connect
the power cable to a properly grounded AC outlet.
OPERATION AND APPLICATIONS
The REQ equalizers are useful signal processing tools where precise frequency
control is needed across the audio spectrum. The frequency band centers are
ISO standard, so it is compatible with most real time analyzers. When used with
an analyzer, the REQ units may be used to tune an acoustical environment to
avoid ringing (feedback), increase clarity, and flatten the overall frequency re-
sponse. An analyzer is useful in determining the amount of equalization needed.
Insert the graphic equalizer between the signal source and the power amplifier or
crossover. Adjust the level and equalization as required to yield the desired
system response. The HPF and LPF are used to band-limit the frequency re-
sponse to increase clarity and reduce noise.
SPECIFICATIONS
Frequency Response: 16 Hz to 30 kHz +/-3 dB
THD: <.03%
S/N Ratio: >90 dB
Max Input: +21 dB (REQ131)
+17 dB (REQ215)
Max Output: +21 dB (REQ131)
+17 dB (REQ215)
Input Impedance: 10KΩ(20K balanced)
Output Impedance: 50Ω
LED Levels: +17, +10, 0, -7, and -13 dB
Frequency Centers: 31 ISO standard 1/3 octave +/-3% (REQ131)
15 ISO standard 2/3 octave +/-5% (REQ215)
Shelving Slope: 12 dB / Octave (REQ131)
6 dB / Octave (REQ215)
Size: 19" x 6" x 1.75"
(48.3 x 15.2 x 4.5 cm)
Weight: 5 lbs. (2 kg)
AUX 2
RETURN
0 10
AUX 1
RETURN/
TAPE IN LEVEL
0 10
HEADPHONE LEVEL
0 10
LEFT RIGHT
0
+20
+6
+14
-10
-15
-20
-30
-
¥
+17
+8
0
-4
-13
HEADPHONE
OUTPUT
AUX 1
0 10
AUX 2
0 10
60
LOW
-15 +15
2.5 K
MID
-15 +15
12.5 k
HIGH
-15 +15
L R
BAL
11/12
0
+20
+6
+14
-10
-15
-20
-30
AUX 1
0 10
AUX 2
0 10
60
LOW
-15 +15
2.5 K
MID
-15 +15
12.5 k
HIGH
-15 +15
L R
BAL
9/10
0
+20
+6
+14
-10
-15
-20
-30
AUX 1
0 10
AUX 2
0 10
60
LOW
-15 +15
2.5 K
MID
-15 +15
12.5 k
HIGH
-15 +15
L R
BAL
7/8
0
+20
+6
+14
-10
-15
-20
-30
AUX 1
0 10 AUX 1
0 10
AUX 2
0 10
60
LOW
-15 +15
2.5 K
MID
-15 +15
12.5 k
HIGH
-15 +15
L R
BAL
5/6
0
+20
+6
+14
-10
-15
-20
-30
AUX 1
0 10
AUX 2
0 10
60
LOW
-15 +15
2.5 K
MID
-15 +15
12.5 k
HIGH
-15 +15
L R
PAN
4
0
+20
+6
+14
-10
-15
-20
-30
AUX 2
0 10
60
LOW
-15 +15
2.5 K
MID
-15 +15
12.5 k
HIGH
-15 +15
L R
PAN
3
0
+20
+6
+14
-10
-15
-20
-30
AUX 1
0 10
AUX 2
0 10
60
LOW
-15 +15
2.5 K
MID
-15 +15
12.5 k
HIGH
-15 +15
L R
PAN
1
0
+20
+6
+14
-10
-15
-20
-30
AUX 1
0 10
AUX 2
0 10
60
LOW
-15 +15
2.5 K
MID
-15 +15
12.5 k
HIGH
-15 +15
L R
PAN
2
0
+20
+6
+14
-10
-15
-20
-30
- ¥
-
¥
-
¥
-
¥
-
¥
-
¥
-
¥
-
¥
TAPE
OUT
TAPE
IN
R
L
TRIM
LINE
INSERT
MIC 1
INSERTINSERT
INSERT
LINELINELINE
TRIM
TRIMTRIMTRIMTRIM
TRIMTRIM
PHANTOM POWER
LEFT
RIGHT
LEFT
RIGHT
LEFT
RIGHT
LEFT
RIGHT
RIGHT OUT AUX2
RET.LEFT
LEFT OUT
AUX 2
RET. RIGHT
AUX 1
RET. RIGHT
AUX1
RET. LEFT
AUX 1
OUT
AUX 2
OUT
MIC 2
MIC 3MIC 4MIC5/6MIC 7/8MIC9/10MIC 11/12
+48V
OFF
+10
+60
+10
+60
+10
+60
+10
+60
+10
+60
+10
+60
+10
+60
+10
+60
VOLUME1 VOLUME2
P OWER A MPLIFIER RA200
EQ
BYPASS
+17
+10
0
-7
-13
0
+12
LEVEL
16
20
30
50 100
HPF LPF
500
400
1
200
HZ KHZ
PWR
1.5
4
2
6
10
30 -12
20 25 31.5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.2K 1.6K 2K 2.5K 3.1K 4K 5K 6.3K 8K 10K 12.5K 16K 20K
+12
-12
LEFT RIGHT
EXAMPLE