Rolls RA63B User Manual

RA63b

DISTRIBUTION AMPLIFIER

ROLLS CORPORATION

SALT LAKE CITY, UTAH

02/10

MADE IN USA

www.rolls.com

678

234

RIGHT

0 dB

+20 dB

MONO

STEREO

GAIN

pwr

12345

1234 1

LEFT

CONFIGURATION

MONO:

STEREO:

DISTRIBUTION
AMPLIFIER

8 Channel Mono
4 Channel Stereo

RA63b

FEATURES

• Stereo 4 channel, Mono 8 channel audio distribution

• Screw driver adjustable front panel volume controls

• Balanced inputs and outputs

SPECIFICATIONS

Input Impedance: 100 KΩ balanced
Max Input Level: +22 dBV
I/O Connectors: Screw terminal; + -, and ground
Output Impedance: 50 Ω balanced
Max Output Level: +24 dB
Max Gain: 20 dB
S/N Ratio: >90 dB
Frequency Response: 10 Hz - 40 kHz, +/- 1 dB
THD: <.008%
Power: 120 VAC 50-60 Hz, 15VA
Size: 19” x 1.75” x 6.5”
(48 x 4.5 x 17 cm)
Weight: 7 lbs. (3 kg)

Quick Start Guide

1X8
2X4

INTRODUCTION

INSTALLATION

Thank you for your purchase of the ROLLS RA63b Distribution Amplifi er. This
unit will distribute a mono signal to eight outputs, or a stereo signal to four right
and four left outputs. The outputs are designed to drive high-level balanced lines
in a sound distribution system. The screw terminals on the rear panel are for
input and output, and each output may power more than one line.

NOTE: THIS MANUAL ASSUMES THE USER HAS A BASIC WORKING
KNOWLEDGE OF AUDIO ELECTRONICS, BALANCED AND UNBALANCED
CONNECTIONS, AND PROPER SIGNAL LEVEL SETTING.

DESCRIPTION

FRONT PANEL

MADE IN USA

www.rolls.com

MONO

12345678

12 34 1234

STEREO

LEFT RIGHT

CONFIGURATION

MONO:

STEREO:

1X8
2X4

+20 dB

GAIN

0 dB

DISTRIBUTION
AMPLIFIER

8 Channel Mono
4 Channel Stereo

pwr

RA63b

Mono 1 - 8 / Stereo 1 - 4: These screwdriver-adjustable controls vary the level of
signal for each indicated output.
+20dB/0dB Gain switch: Pressing this switch in provides 20 dB of gain to the
input signal.
pwr: LED indicating the unit’s power status.
STEREO/MONO CONFIGURATION
To change the stereo/mono confi guration of the RA63b, use the switch on the
front panel to select the desired confi guration.

REAR PANEL

MADE IN USA

www.rolls.com

MODEL RA63b

INPUTS

right/

left

SERIAL NUMBER

120 VAC

MADE IN U.S.A.

50/60 Hz 15 VA

mono

-+ -+-+-+-+-+-+

OUTPUTS

RIGHT LEFT

-+-+ -+

12345678

MONO

12341234

STEREO

WARNING:

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER.
NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL

RISQUE DE CHOC - NE PAS ENLEVER

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

DO NOT OPEN

120 VAC 50/60 HZ 15 VA: Power Cord. Connect to a properly grounded AC
source.

INPUTS Right/Mono and Left: These fi ve terminals, labeled + for the positive
or “hot” connection, - for the negative connection, and the ground symbol for
earth ground connection are for connection to the balanced or unbalanced input
signal(s) to be distributed.

MONO 1 - 8, STEREO 1 - 4: For each channel; the two terminals labeled + for
the positive or “hot” portion of the output signal, and the - for negative or neutral
portion. The ground signal indicates the terminal to be connected to ground.

-+

+ = In-phase or "Hot"

- = Out-of-phase or "Negative"

(NOTE: This is NOT a ground connection)
= Ground

Install the RA63b in a standard 19” rack. The unit is intended for installations
where several zones or areas need to be controlled and a high level balanced
signal is required to drive the input lines.

SCHEMATIC

D5

LDSG

POWER

503

C10

4.7K

R4

C4

1000UF 16VC51000UF 16V

+15V

503

503

D3 1N4001

D1 1N4001

T1

120PF

4

10K

C19

ROLLS P/N 812

SW SPST

R7251R74

R63 10K

-12

OUT +

C71 10U

+12

CH 7

8

1

R71

4560

D2 1N4001

OUT -3GND

4560

6

10K

1

2

U1DA

C18

SW2

10U

51

C63

5

P6

2

7

3

PL1

U1DB

5

-15V

503

1N4001

ROLLS CORPORATION

D4

C20

C3

+12V+12V+12V

C2

C1

IEC MALE

OUT +

OUT -

4

10U

C72

C81

10U

51

R82 51

120PF

C73

8

+12

R73 10K

R81

4

-12

P7

10K

CH 8

5968 S 350 W

MURRAY, UT 84107

503

-12V-12V-12V

503

503

5

C82

51

R84

7

4560

U1EB

6

10K

1

4560

U1EA

2

3

RA63B DISTRIBUTION AMPLIFIER

Title

10U

C83

5

P8

123

OUT +

C11 10U

51

+12

DPDT

20 dB BOOST

R8

C15 120PF

C22

51

U1AB

5

100K

R9

10K

+12

10K

10U

C23

4560

P2

MONO

8

4

10K

1X8

120PF

C9

R16

4560

C14

120PF

-12

10K

6

102

OUT +

1

C31 10U

51

R32

4560

8

10K

+12

R23

R31

10K

4560

2

CH 3

2X4

DUAL

S2A

DPDT

3

1

1

8X1 OR 4X2 SWITCH

4560

4

U8A

2

3

7

U8B

R10

10K

5

C15

120PF

R1810K

OUT +

OUT -3GND

1

2

R12

7

C13

4560

8

U1B

6

5

R11

10K

1

4560

U1A

2

3

P1

CH 1

S1A

100K

120PF

R1

C18

R3

10K

R2 10K

7

10K

4560

8

U7B

+12

6

102

C8

R7

10K

1

2

+IN

-IN

C12

51

R14

4560

OUT -

4

5

10U

10U

C21

R24

R22 51

120PF

10K

R13

4

-12

10K

1

U7A

2

3

5

R610K

3

CIRCUIT

GROUND

7

4560

8

+12

6

R21

10K

1

U1AA

2

3

CH 2

4

-12

S1B

DPDT

456

20 dB

BOOST

R17

R5

10K

R15 10K

C7 120PF

C6

120PF

R19

4

5

+IN

-IN

OUT -3GND

2

7

U1BB

6

1

U1BA

3

2

-12

OUT +

OUT -

4

OUT -3GND

2

R54

7

U1DB

6

1

U1DA

3

5

C42

4560

10K

10K

2

CIRCUIT

10U

4

4560

6

1

U1CA

GROUND

120PF

R53 10K

-12

7

3

C61

U1CB

5

OUT +

4

R62 51

R44

P4

51

C43

+12

CH 6

R61

8

4

10K

OUT -

10U

10U

120PF

-12

5

4560

10K

4560

2

R43 10K

C62

R64

7

U1EB

6

1

U1EA

3

C41 10U

51

R42

8

+12

R41

CH 4

C52

51

C53

5

P5

C32

10U

51

R34

120PF

C33

10K

R33

5

4

-12

P3

10K

OUT +

1

C51 10U
51

R52

4560

8

+12

10K

R51

4560

2

CH 5

Rev:

RA63B.SCH A

Ba

Size: Document Number:

120PF

R83 10K

4

-12

10K

1

1

Sheet of

4 MARCH 2010

Date: