1
PA71.SCH A
25 MAY 2001Date:
Rev:
Sheet 1of
PA71 POWER AMP
Ba
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J5
JA P D C
D 5
LD R R
1
1
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2
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4
55
66
77
U 1
TD A7 2 4 0 A
P2
P1 0 0 K
C 1 0
1U
C 1 3
47 U
C 1 4
10 U
C 1 1 . 1
C 1 8
1U
C 1 2 . 2 2
C 1 5
.2 2
R 1 3
2. 2
R 1 4
2. 2
C 1 6
10 0 0 U F
R 1 5
10 K
+V
VO LU M E
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2
J4
C O N 2
J3
PH O NE 1/4
D 1
1N 40 0 1
D 2
1N 40 0 1
D 3
1N 40 0 1
D 4
1N 40 0 1
C 1 7
+V
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PC R C A X 2
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22 K
R 7
22 K
R 1 1
22 K
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45 6 0
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45 6 0
C 8
25 P F
C 6
47 0 P F
C 5
47 0 P F
1 2
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J1
XL R F P C
R 3
33 2 1 %
R 4
33 2 1 %
R 6
22 K
R 5
R 1 2
22 K
+V
+V
+V
C 7
1U
C 4
47 U
C 3
47 U
C 1 4 7 U C 2 4 7 U
R 2
R 1
4. 99K 1 %
P1
P1 0 0 K
R 9
22 K
C 9
1
H 1 A
HD3
2
H 1 B
HD3
3
H 1 C
HD3
22 K
4. 99K 1 %
U 2 B
U 2 A
47 U
R 1 0
22 K
ROLLS COPRORATION
5968 SOUTH 350 WEST
SALT LAKE CITY, UT 84107
Si z e: D ocu me nt num be r;
22 00 UF 16 V
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 power-
ing 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 con-
denser 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
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
MIC
INPUT
LINE
INPUT
LINE/
POWER
OUT
SPEAKER
OUTPUT
12 VAC/
VDC
PWR
LINE
LEVEL
MIC
LEVEL
PHANTOM
POWER
MADE IN USA
www.rolls.com
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