Filter
Top Products
Thank you for your purchase of the EQ101 10-Band Graphic Equalizer.
This unit is designed and manufactured to provide years of quality
service. Please read this manual carefully for proper operation and care.
INSPECTION
1. Unpack and Inspect the EQ101 package
Be sure to examine the unit and the carton for any signs of damage that
may have occurred during shipping. If obvious physical damage is
noticed, contact the carrier immediately to make a damage claim. We
suggest saving the shipping carton and packing materials for safely
transporting the unit in the future.
2. Please complete the Warranty Registration Card and return it to the
factory.
DESCRIPTION
REAR PANEL
IN: 1/4" TS unbalanced and RCA jacks for connection to input signal.
This could be an instrument or the output of a signal processor.
OUT: 1/4" TS unbalanced and RCA jacks for connection to an amplifier,
or mixer.
LVL: This control adjusts the overall level of the equalizer. Note that the
center position is detented for easy location of unity gain.
32 through 16K: These controls boost or cut the indicated frequency.
When the slider is in the center (detented) position, the frequency is not
effected.
BYPASS/EQ SWITCH: Selects whether the input signal is sent through
the equalization circuitry (EQ) or is sent directly to the outputs (BY-
PASS). Note that the EQ101 has a "hard-wire" bypass meaning that if
there is no power connected to the unit, signal will still be present at the
outputs.
PWR: This LED indicates that power is applied to the EQ101.
12 - 17 VDC: For connection to the AC adapter. Please use either the
ROLLS PS27, or a proper adapter with 12 - 17 VDC, 150 mA, outside of
barrel positive.
OPERATION
Shown below is an example of connection and operation of the EQ101.
SCHEMATIC
IN OUT IN
OUT
PWR
EQ
BYPASS
LVL
12 - 17
VDC
32 64 125
250
500 1K 2K 4K
8K
16K
EQ101
+12
-12
0
+
-
IN OUT IN
OUT
PWR
EQ
BYPASS
LVL
12 - 17
VDC
32 64 125
250
500 1K 2K 4K
8K
16K
EQ101
+12
-12
0
+
-
Signal processor or preamplifier
To amplifier
or mixer
Graphic equalizers boost the
indicated frequency. Low
frequencies are equivalent to
bass sounds and high fre-
quencies equal treble sounds.
12-Apr-1999
Document Number:
Date: Sheet of
Ba
P3
P100K SS
P2
P100K SS
P1
W100KCC
J1
PHONE 1/4
J2
PHONE 1/4
J3
RCA JACK
J5
RCA JACK
C24
1U
2
3
1
4
U1A
4560
6
5
7
8
U2B
4560
2
3
1
4
U2A
4560
R1
1K
R3
1K
R2
100K
R4
100K
1
2
3
SW1A
DPDT
4
5
6
SW1B
DPDT
C25
10U
R2418K
R25
18K
R23
4.7K
R22
4.7K
C1
.0 6 8
BIAS
BIAS
BIAS
BIAS
C3
.0 3 9
VCC
P5
P100K SS
P4
P100K SS
6
5
7
8
U3B
4560
2
3
1
4
U3A
4560
R5
1K
R7
1K
R6
100K
R8
100K
C10
C5
.0 1 5
BIAS
BIAS
C7
.0 0 8 2
VCC
P7
P100K SS
P6
P100K SS
6
5
7
8
U4B
4560
2
3
1
4
U4A
4560
R9
1K
R11
1K
R10
100K
R12
100K
C12
C14
C11
.0 0 3 9
BIAS
BIAS
C13
.0 0 2 2
VCC
P9
P100K SS
P8
P100K SS
6
5
7
8
U5B
4560
2
3
1
4
U5A
4560
R13
1K
R15
1K
R14
100K
R16
100K
C16
.0 6 8
C18
.0 3 3
C15
820PF
BIAS
BIAS
C17
470
VCC
P11
P100K SS
P10
P100K SS
6
5
7
8
U6B
4560
R17
1K
R18
100K
C20
.0 1 5
.0 0 8 2
C19
270PF
BIAS
BIAS
VCC
A
IN 9 -1 5 V AC /VDC
C1
1000 UF
D1
1N400X
2
3
1
J4
JAPDC
C26
47U
R27
22K
R19
18K
VCC
R29
10K
R26
10K
6
5
7
8
U1B
4560
VCC
C30
27PF
C8
27PF
D2
LDSG
R28
4.7K
2
3
1
4
U6A
4560
R20
1K
R21
100K
C21
120PF
C6
C4
1.5UF
C2
3.3UF
C23
503
1UF
.47
.27
.12
C22
ROLLS CORPORATION
5143 South Main Street
Salt Lake City, UT 84107
10 BAND PRECISION EQ EQ101
Rev.
Size
EQ101.SCH
1