Rolls PA71 User Manual
PA71
MicroMix
Power Amplifi er
Salt Lake City, Utah
7/10
• RCA Inputs
• XLR Mic Input
• Spring-loaded, and 1/4" output
• Low noise, effi cient operation
The PA71 mixes an unbalanced line level
signal with a mic signal to a powered 1/4" or
speaker terminal outputs. The unit is perfect
for small speakers in small environments.
MicroMix Power Amplifi er
PA71
LINE
INPUT
PHANTOM
POWER
on off
LINE
LEVEL
MIC
INPUT
LINE/
POWER
OUT
MIC
LEVEL
SPEAKER
OUTPUT
MADE IN USA
www.rolls.com
Quick Start Guide
12 VAC/
VDC
PWR
INTRODUCTION
Thank you for your purchase of the PA71 MicrMix Power Amplifi er. This
unit mixes a stereo RCA signal with a microphone to a 1/4" line level
output and a powered spring loaded speaker output. The unit for powering small speakers in small environments.
DESCRIPTION
REAR PANEL
LINE INPUT: RCA line level inputs (mixed to mono)
MIC INPUT: Balanced XLR input for connection to a dynamic or condenser microphone.
LINE/POWER OUT: 1/4" TS output.
SPEAKER OUTPUT: Spring-loaded output terminals - the red terminal is
positive and the black one is negative.
12VAC/VDC: For connection to the power supply.
SIDE PANEL
PHANTOM POWER: Jumper pin for connecting 12 volts of phantom
power to the Mic Input.
FRONT PANEL
LINE LEVEL: Adjusts the level of signal from the Line Input to the Line/
Power and Speaker outputs.
MIC LEVEL: Adjusts the level of signal from the Line Input to the Line/
Power and Speaker outputs.
CONNECTION / OPERATION
Connect input sources such as CD players or cassette players to the
LINE
INPUT
PHANTOM
POWER
on off
LINE
LEVEL
MIC
INPUT
MIC
LEVEL
LINE/
POWER
OUT
SPEAKER
OUTPUT
12 VAC/
VDC
MADE IN USA
www.rolls.com
PWR
RCA inputs, connect a microphone to the balanced XLR Mic Input. If the
microphone is a condenser type, move the Phantom Power jumper to
connect the indicated pins.
WARNING: DO NOT GROUND THE SPEAKER OUTPUT
TERMINALS. THE SPEAKER TERMINALS ARE NOT AT
GROUND POTENTIAL.
SPECIFICATIONS
Line Input Impedance: 47K Ohms
Mic Input Impedance: 600 Ohms
Phantom Power Voltage: 12 V
Power Output: 5 Watts (8 Ohms)
Voltage Gain: 40 dB
Maximum Supply Voltage: 18 VDC
THD: .05% typical
EIN: 3 mV
Effi ciency: 65%
Input Sensitivity: 28 mV
Bandwidth: 20Hz - 25 kHz
Size: 4.25" x 2.375" x 1.5"
Weight: 1 lb.
SCHEMATIC
H 1 A
H 1 B
4 . 9 9 K 1 %
X L R F P C
H 1 C
H D 3
H D 3
H D 3
+V
1
2
1 2
J 2
P C R C A X 2
2
3
R 2
4 . 9 9 K 1 %
C 1
J 1
3
4 7 U
R 7
2 2 K
1
3
R 8
2 2 K
R 3
4 7 U
4 7 U
C 2
3 3 2 1 %
R 4
3 3 2 1 %
C 3
C 4
R 6
4 7 U
2 2 K
C 7
1 U
+V
R 9
2 2 K
J 5
J A P D C
R 1
C 6
R 5
4 7 0 P F
2 2 K
+V
8
6
7
U 2 B
V O L U M E
U 2 A
4
4 5 6 0
D 1
1 N 4 0 0 1
D 2
1 N 4 0 0 1
D 3
1 N 4 0 0 1
D 4
1 N 4 0 0 1
P 1
4 5 6 0
P 1 0 0 K
R 1 2
2 2 K
C 8
2 5 P F
R 1 0
2 2 K
C 1 0
R 1 1
1
2 2 K
1 U
+V
C 1 7
2 2 0 0 U F 1 6 V
+V
C 1 1
. 1
C 1 8
U 1
6
T D A 7 2 4 0 A
6
3
3
112
2
C 1 3
4 7 U
C 1 4
1 0 U
R 1 5
1 0 K
D 5
L D R R
S i z e :
C 1 2
. 2 2
1 U
R 1 3
2 . 2
7
7
5
5
4
R 1 4
4
2 . 2
ROLLS COPRORATION
5968 SOUTH 350 WEST
SALT LAKE CITY, UT 84107
PA71 POWER AMP
D o c u m e n t n u m b e r ;
PA71.SCH A
Ba
25 MAY 2001Date:
J 4
C O N 2
C 1 6
1 0 0 0 U F
C 1 5
. 2 2
1
2
J 3
P H O N E 1 / 4
Sheet 1 of
Rev:
1
5
C 5
4 7 0 P F
P 2
P 1 0 0 K
2
3
C 9
4 7 U
2
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