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

OPERATION

Shown below is an example of connection and operation of the EQ101.

Signal processor or preamplifier

To amplifier

or mixer

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.

Graphic equalizers boost the indicated frequency. Low frequencies are equivalent to bass sounds and high fre- quencies equal treble sounds.

IN

 

OUT

 

IN

OUT

 

 

 

12 - 17

 

 

 

 

 

 

 

 

 

 

VDC

 

 

 

 

 

 

 

 

 

 

+

 

 

 

 

 

 

 

 

 

 

-

 

 

 

BYPASS

 

EQ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PWR

 

 

 

 

 

 

 

 

EQ101

+12

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

-12

 

 

 

 

 

 

 

 

 

 

LVL

32

64

125

250

500

1K

2K

4K

8K

16K

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.

IN

 

OUT

 

IN

OUT

 

 

 

12 - 17

 

 

 

 

 

 

 

 

 

 

VDC

 

 

 

 

 

 

 

 

 

 

+

 

 

 

 

 

 

 

 

 

 

-

 

 

 

BYPASS

 

EQ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PWR

 

 

 

 

 

 

 

 

EQ101

+12

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

-12

 

 

 

 

 

 

 

 

 

 

LVL

32

64

125

250

500

1K

2K

4K

8K

16K

SCHEMATIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P 2

R 1

 

8

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P 1 0 0 K

1SKS

6

 

4 5 6 0

 

 

 

 

 

 

 

 

 

 

 

 

 

C 1

5

U 2 B

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J 3

 

 

 

 

C 8

 

 

C 2

. 0 6R8 2

 

R 3

 

 

 

 

R C A J A C K

 

 

 

 

 

 

P 3 3 . 3 U F

1 0 0 K

4 5 6 0

 

 

 

 

 

 

 

2 7 P F

P 1 0 0 K S S

1 K

 

 

 

 

 

 

 

 

 

BIAS

 

 

 

2

U 2 A 1

 

 

 

 

 

 

R 2 2 R 2 5

 

 

 

 

 

C 3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P 1

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

W

1 0 0 4K .C7CK

1 8 K

 

C 4

 

 

 

 

. 0 3 9

 

 

 

 

 

BIAS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 . 5 U F

 

8

 

R 4

 

 

 

 

 

 

 

 

 

 

 

P 4

R 5

 

VCC

1

0 0 K

 

 

J 1

 

 

 

 

 

 

 

 

4

 

 

 

P H O N E

1 / 4

 

4 5 6 0

 

P 1 0 0 K S1 SK

6

 

4 5 6 0

 

 

 

 

 

 

 

 

 

 

 

BIAS

 

 

 

 

S W 1 1A

 

R 2 32

 

 

 

 

C 5

 

 

 

7

 

 

 

 

2

 

C 214U

4 . 7 K

 

1

 

 

5

U 3 B

 

 

 

 

 

 

 

3

 

U 1 A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

C 6

. 0 1 5

 

 

 

 

 

 

 

D P D T

 

R 2 4 1 8 K

R 2 9

P 5 1UF

 

R 6

 

R 7

4 5 6 0

 

 

 

 

 

 

 

 

1 0 K

P 1 0 0 K

S S

1 0 0 K

1 K

 

 

J 2

 

 

 

4

 

 

 

 

BIAS

 

 

 

2

U 3 A 1

 

 

P H O N E 1 / 4

 

 

 

 

 

 

 

 

 

 

C 7

 

 

S W 1

4B

 

2 7 P F

 

 

C 1 0

 

 

 

 

3

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C 2 5

 

C 3 0

 

 

 

 

 

 

 

. 0 0R882

 

 

 

 

 

 

 

 

 

 

.47

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

8

 

1

0 0 K

 

 

D P D T

 

 

 

 

 

P 6

R 9

 

VCC

4

 

 

 

J 5

 

1 0 U

 

R 2 6

 

 

P 1 0 0 K

S1 SK

6

 

4 5 6 0BIAS

 

 

 

 

 

 

 

 

 

 

 

C 1 1

U 4 B 7

 

 

 

 

R C A J A C K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 0 K

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C 1 2

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC8

 

 

 

. 0 0R3 19 0

 

 

 

 

 

 

 

 

 

 

 

 

P 7 .27

R 1 1

 

 

 

 

 

 

 

 

4 5 6 0 6

 

 

P 1 0 0 K S S

1 0 0 K

1 K

4 5 6 0

 

 

 

 

 

7

 

 

 

 

BIAS

 

 

 

2

U 4 A 1

 

 

 

 

 

U 1 B

 

 

 

 

 

 

 

 

C 1 3

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

C 1 4

 

 

 

 

. 0 0R2122

 

 

 

 

 

 

 

 

 

 

 

.12

 

 

8

 

1 04 0 K

 

 

 

C 2 3

 

 

 

 

 

P 8

R 1 3

 

VCC

 

 

 

 

 

 

 

 

 

P 1 0 0 K

S1 SK

6

 

4 5 6 0BIAS

 

 

 

 

 

5 0 3

 

 

 

 

 

 

C 1 5

U 5 B

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C 1 6

88 2 0RP1F4

 

 

 

 

 

 

 

 

 

 

 

 

 

. 0 6

R 1 5

 

 

 

 

 

 

 

 

 

 

 

 

P 9

 

1 0 0 K

 

4 5 6 0

 

 

 

 

 

 

 

 

 

P 1 0 0 K S S

1 K

 

 

 

 

 

 

 

 

 

 

 

 

BIAS

 

 

 

2

U 5 A 1

 

 

I N 9 - 1 5 V A C / V D C

 

 

 

 

 

 

 

 

C 1 7

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

D 1 VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J 4

1 N 4 0 0 X

BIAS

 

 

 

. 0 3 3

 

 

 

4 7 0

 

 

 

 

 

2

 

 

R 1 9

 

 

 

C 1 8

 

 

 

 

R 1 6

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

1 04 0 K

 

 

 

3

 

 

1 8 KR 2 7 C 2 6

 

P 1 0

R 1 7

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

C 1

 

 

 

 

BIAS

 

 

 

 

 

 

R 2 8

4 7 U

P 1 0 0 K S1 SK

6

 

4 5 6 0

 

 

 

 

 

 

 

4 . 7 K2 2 K

 

 

 

U 6 B 7

 

 

 

 

J A P D C

 

1 0 0 0 U F

 

 

 

 

C 1 9

 

 

 

 

 

 

 

 

D 2

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C 2.00 1 5 2 7 0RP1F8

 

 

 

 

 

 

 

 

 

L D S G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P 1 1

 

1 0 0 K

 

 

 

 

 

 

 

 

 

 

 

 

P 1 0 0 K S S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIAS

 

 

R 2 0

 

 

 

 

 

 

 

 

 

 

 

 

C22

 

 

 

1 K 2

4 5 6 0 ROLLS CORPORATION

 

 

 

 

 

 

 

 

 

 

 

 

 

C 2 1 U 6 A

1

5143 South Main Street

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

Salt Lake City, UT 84107

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 2 0 P F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

. 0 0 8 2

 

 

 

R 2 1

 

10 BAND PRECISION EQ EQ101

 

 

 

 

 

 

 

 

 

 

 

 

1 04 0 K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIAS

 

 

Size Ba Document Number:EQ101.SCH

Rev.A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Date: 2-Apr-1999

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Rolls EQ101 owner manual Signal processor or preamplifier, Or mixer