INTRODUCTION
Thank you for your purchase of the PA71 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 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:
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 | MIC | LINE/ | SPEAKER | 12 VAC/ |
INPUT | INPUT | POWER | OUTPUT | VDC | |
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off | PHANTOM |
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on | POWER |
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| MADE IN USA | |
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| www.rolls.com | |
| LINE |
| MIC |
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| LEVEL | LEVEL |
| 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 |
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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 |
Efficiency: | 65% |
Input Sensitivity: | 28 mV |
Bandwidth: | 20Hz - 25 kHz |
Size: | 4.25" x 2.375" x 1.5" |
Weight: | 1 lb. |
SCHEMATIC |
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| H1A H1B H1C |
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| HD3 HD3 HD3 |
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| C6 |
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| +V |
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| R5 | 470PF |
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| 1 | 2 | 3 |
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| 22K |
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R1 |
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4.99K1% |
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| C147U C247U 3321% |
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2 |
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XLRFPC | J1 |
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| R4 | 5 | U2B | P1 |
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| C3 | C4 | 3321% | C5 | 4560 |
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| 47U | 47U | R6 | 470PF |
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1 |
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| C11 |
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| R12 |
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| J2 | R7 |
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| P2 | VOLUME |
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| 22K |
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| C18 |
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| C7 |
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| PCRCAX222K | P100K |
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| C12 |
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| 1 |
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| 1U | .22 |
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| C8 |
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| 3 |
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| 1U |
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| U1 |
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| R8 |
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| 25PF |
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| TDA7240A |
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2 |
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| R11 | C10 |
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| 3 | U2A |
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| 22K |
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| 22K |
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| 1U | 2 | 1 | 4 5 | CON2 |
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| R14 | C16 |
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| 2.2 | 1000UF | J3 |
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| PHONE1/4 |
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| C9 |
| R10 |
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| C15 |
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| 22K |
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| 47U |
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| C14 |
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| 10U |
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| D1 |
| +V |
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| 1N4001 |
| C17 | R15 |
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| D2 |
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| 2200UF16V | 10K |
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| J5 |
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| 1N4001 |
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| D5 |
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| D3 |
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| LDRR |
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| 1 |
| 1N4001 |
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| JAPDC |
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| D4 |
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| ROLLS COPRORATION |
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| 5968 SOUTH 350 WEST |
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| 1N4001 |
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| SALT LAKE CITY, UT 84107 | |||
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| PA71 POWER AMP |
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| Size: | Documentnumber; |
| Rev: |
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| Ba | PA71.SCH |
| A |
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| Date: 25 MAY 2001 | Sheet 1 of 1 | ||
