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PA71.SCH

A

25 MAY 2001

Date:

Rev:

Sheet 1 of

PA71 POWER AMP

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ROLLS COPRORATION
5968 SOUTH 350 WEST

SALT LAKE CITY, UT  84107

S i z e :

D o c u m e n t   n u m b e r ;

2 2 0 0 U F   1 6 V

INTRODUCTION
Thank you for your purchase of the PA71 Plus MicrMix Power Amplifier.
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. The 1/4" output is specially de-
signed to power stereo headphones.

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" TRS output for connection to another amplifier,
or a pair of standard headphones.
SPEAKER OUTPUT: Spring-loaded 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 

9

Mic Input Impedance:

600 

9

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

Efficiency:

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

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