Rolls RA63B User manual

RA63b
DISTRIBUTION AMPLIFIER
Quick Start Guide
ROLLS CORPORATION
SALT LAKE CITY, UTAH
02/10
12345
1234 1
MONO
STEREO
LEFT
1X8
2X4
STEREO:
MONO:
CONFIGURATION
MADE IN USA
www.rolls.com
pwr
GAIN
0 dB
+20 dB
8 Channel Mono
4 Channel Stereo
DISTRIBUTION
AMPLIFIER
678
234
RIGHT
RA63b
FEATURES
• Stereo 4 channel, Mono 8 channel audio distribution
• Screw driver adjustable front panel volume controls
• Balanced inputs and outputs
Input Impedance: 100 KΩbalanced
Max Input Level: +22 dBV
I/O Connectors: Screw terminal; + -, and ground
Output Impedance: 50 Ωbalanced
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)
SPECIFICATIONS

INTRODUCTION
Thank you for your purchase of the ROLLS RA63b Distribution Amplifier. 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
pwr
GAIN
0 dB
+20 dB
8 Channel Mono
4 Channel Stereo
DISTRIBUTION
AMPLIFIER
12345678
1 234 12 34
MONO
STEREO
LEFT RIGHT
RA63b
1X8
2X4
STEREO:
MONO:
CONFIGURATION
MADE IN USA
www.rolls.com
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 configuration of the RA63b, use the switch on the
front panel to select the desired configuration.
REAR PANEL
INPUTS OUTPUTS
MADE IN U.S.A.
SERIAL NUMBER
RISQUE DE CHOC - NE PAS ENLEVER
WARNING:
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER.
NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TOQUALIFIED SERVICE PERSONNEL
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
120 VAC
50/60 Hz 15 VA
MODEL RA63b
-+ -+-+-+-+-+-+
right/
mono left
12341234
-+-+ -+
STEREO
RIGHT LEFT
12345678 MONO
MADE IN USA
www.rolls.com
120 VAC 50/60 HZ 15 VA: Power Cord. Connect to a properly grounded AC
source.
INPUTS Right/Mono and Left: These five 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.
INSTALLATION
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.
1
ROLLS CORPORATION
5968 S 350 W
MURRAY, UT 84107
1
RA63B.SCH A
4 MARCH 2010
Title Size: Document Number:
Date:
Rev:
Sheet of
RA63B DISTRIBUTION AMPLIFIER
Ba
+12
+12
-12
-12
+15V
-15V
+12
-12
+12
-12
+12
-12
+12
-12
+12
-12
POWER
CH 1
CH 2 CH 3 CH 4
CH 7 CH 8
+IN -IN
CIRCUIT
GROUND
20 dB BOOST
R12 51 C11 10U
C12
10U
R11
10K
2 3
1
4
U1A
4560
R13 10K
6 5
7
8
U1B
4560
C13
120PF
R1451
D1 1N4001
D3 1N4001
D4 1N4001
D5 LDSG
R4 4.7K
C10
503
D2 1N4001
SW2
SW SPST
PL1
IEC MALE
T1
ROLLS P/N 812
R7
10K
R5
10K
6 5
7
8
U7B
4560
C6
120PF
C15 120PF R8
10K
R610K
C8
102
2 3
1
4
U7A
4560
R2 10K
R3
10K R1 100K
C18 120PF
1
2
3S1A
DPDT
2 3
1
4
U1AA
4560
6 5
7
8
U1AB
4560
2 3
1
4
U1BA
4560
6 5
7
8
U1BB
4560
2 3
1
4
U1CA
4560
6 5
7
8
U1CB
4560
2 3
1
4
U1DA
4560
6 5
7
8
U1DB
4560
2 3
1
4
U1EA
4560
6 5
7
8
U1EB
4560
R22 51
R24
51
C23
120PF
C22
10U
R32 51 R34 51 C32
10U
C33
120PF
R31
10K
C43
120PF
C42
10U
R71
10K
C73
120PF
R72 51 R74
51 C72
10U
C83
120PF
R84
51 C82
10U
1OUT + 4OUT + 2OUT - 3GND 5OUT -
1OUT + 4OUT + 2OUT - 3GND 5OUT -
1OUT + 4OUT + 2OUT - 3GND 5OUT -
1 2 3 4 5
R23
10K
C21
10U
R33 10K
C31 10U
C41 10U
R43 10K
R4451
R42 51
R41 10K
R73 10K
C71 10U
R82 51
C81
10U
R83 10K
R81 10K
R21 10K
P7
10K
P8
10K
P1
10K
P2
10K
P3
10K
P4 10K
C4 1000UF 16V C5 1000UF 16V
+12
-12
+12
-12
CH 5 CH 6
2 3
1
4
U1DA
4560
6 5
7
8
U1DB
4560
2 3
1
4
U1EA
4560
6 5
7
8
U1EB
4560
R51
10K
C53
120PF
R52 51
R54
51 C52
10U
C63
120PF
R64
51 C62
10U
1OUT + 4OUT + 2OUT - 3GND 5OUT -
R53 10K
C51 10U
R62 51 C61
10U
R63 10K
R61 10K
P5
10K
P6
10K
+12
-12
+IN -IN
CIRCUIT GROUND
20 dB BOOST
R19
10K
R10
10K
6 5
7
8
U8B
4560
C15
120PF
C7 120PF
R15 10K
R1810K
C14
102
2 3
1
4
U8A
4560
R16
10K
R17
10K R9 100K
C9 120PF
4
5
6
S1B
DPDT
1X8 2X4
C2 503
C3 503
C19
503
C20 503
C1 503
C18 503
+12V+12V+12V
-12V-12V-12V
8X1 OR 4X2 SWITCH
MONO DUAL
1
2
3
S2A DPDT
-+
+= In-phase or "Hot"
-= Out-of-phase or "Negative"
(NOTE: This is NOT a ground connection)
= Ground
SCHEMATIC