GRAPHIC EQUALIZERS
GRAPHIC EQUALIZERS
Rolls graphic equalizers are designed for modern sound reinforcement and recording applications. Smooth bandpass filtering and transparent low-noise circuitry provide virtually distortion free operation.
REQ131 Mono 31-Band Graphic EQ
HPF
50
LEVEL
LPF
100
30
20
200 2
6
4
20
0
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
+17
10
+10
PWR
1.5
0
16
400
500 1
HZ
-7
+12
-13
30 -12
KHZ
-12
EQ
BYPASS
REQ215 Dual 15-Band Graphic EQ
20
20
20
+17
10
40
63
160
100
250
400
630
1K
1.6K 2.5K
4K
6.3K
10K
20
16K
+12
Hz 150
+10
0
0
-7
3.5
-13
160
250
400
630
1K
1.6K 2.5K
4K
6.3K
10K
16K
0
-7
3.5
kHz
30
PWR
-12
LVL
CHANNEL 1
IN/OUT
100
6
-13
-12
LVL
63
Hz 150
0
30
kHz
10
+10
6
40
+12
+17
CHANNEL 2
IN/OUT
REQ231 Dual 31-Band Graphic EQ
CHANNEL 1
HPF
50
LEVEL
LPF
100
30
20
200 2
6
4
20
0
10
25
31.5
40
50
63
80
125
100
160
200
250
315
400
500 630
800
1K
1.2K
1.6K
2.5K 3.1K
2K
4K
5K
6.3K
8K
10K 12.5K 16K
20K
+17
+12
+10
PWR
1.5
0
16
400
500 1
HZ
-7
+12
-13
30 -12
KHZ
-12
EQ
BYPASS
CHANNEL 2
HPF
50
LPF
100
30
20
200 2
LEVEL
6
4
20
0
10
1.5
25
31.5
40
50
63
80
125
100
160
200
250
315
400
500 630
800
1K
1.2K 1.6K
2.5K 3.1K
2K
4K
5K
6.3K
8K
10K 12.5K 16K
20K
+17
+12
+10
PWR
0
16
400
500 1
HZ
KHZ
-7
+12
-13
30 -12
-12
EQ
BYPASS
REQ232 Stereo 31-Band Graphic EQ
HPF
LEVEL
LPF
20
50
100
30
20
200 2
4
+10
HZ
400
500 1
31.5
40
50
63
80
100
125
160
200
KHZ
BYPASS
SPECIFICATIONS
Input Impedance:
Output Impedance:
Frequency Centers:
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
PWR
30 -12
+12
-7
-12
-13
LEFT RIGHT
FEATURES
• Standard ISO Frequency Centers
• Adjustable Hi/Low Shelving Filters
• XLR, 1/4" and RCA Inputs and Outputs
Max Output:
315
0
EQ
Frequency Response:
THD:
S/N Ratio:
Max Input:
250
10
1.5
16
25
+17
0
6
16 Hz to 30 kHz +/-3 dB
<.03%
>90 dB
+21 dB (REQ131, 231 and 232)
+17 dB (REQ215)
+21 dB (REQ131, 231 and 232)
+17 dB (REQ215)
10KΩ (20K balanced)
50 Ω
31 ISO standard 1/3 octave +/-3%
(REQ131, 231 and 232)
15 ISO standard 2/3 octave +/-5%
(REQ215)
• +/-12 dB boost/cut
• Dual Channel Operation - REQ231 and REQ215
• Stereo Operation - REQ232
LED Levels:
Shelving Slope:
Size:
Weight:
+17, +10, 0, -7, and -13 dB
12 dB / Octave (REQ131, 231)
6 dB / Octave (REQ215 and 232)
19" x 6" x 1.75" (REQ131, 215, 232)
(48.3 x 15.2 x 4.5 cm)
19" x 6" x 3" (REQ231)
(48.3 x 15.2 x 9 cm)
5 lbs. (2 kg) (REQ131, 215, 232)
8 lbs. (4 kg) (REQ231)
ROLLS CORP.
5143 South Main Street
Salt Lake City, UT 84107
(801) 263-9053 • (801) 263-9068
www.rolls.com
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