Power Base Series Power Amplifiers
The unit should never output heavy
3.3.4 Transformer Thermal Protection
All Power Base amplifiers have transformer thermal protection. This protection circuitry is activated in un- usual situations where the unit’s transformer tempera- ture rises to unsafe levels. Under these abnormal conditions, the unit removes power to the
It is very unlikely that your Power Base amplifier will ever activate transformer thermal protection as long as it is operated within rated conditions. Your amplifier is designed to continue operating under conditions where other amplifiers would fail. But even when you exceed the limits of a Power Base amplifier, it still pro- tects
3.3.5 Fuses and Circuit Breakers
All 120 VAC, 60 Hz units and all Power
A Power Base amplifier will not blow its fuses or trip its breaker unless something is wrong. In the rare event that an internal fuse blows, please refer the unit to a qualified technician. If the breaker in a Power
3.4 Controls
The Power switch is th only control located on the front panel. All others are located on the rear, including the level controls.
When making any setup or wiring changes, don’t forget to turn off the amplifier, turn down the level controls and disconnect the power cord. Be sure to turn down (full counterclockwise) the channel 2 level control when us- ing either mono mode. The Parallell Mono/Stereo/ Bridge Mono switch is used to select Stereo, Bridge- Mono or
CHANNEL 2 | CHANNEL 1 |
LEVEL CONTROL | LEVEL CONTROL |
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5 | 7 |
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3 |
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2 |
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| 10 |
| INPUT GROUND LIFT |
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1 |
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0 |
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| INPUT | LIFT | INPUT | 0 |
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GAIN |
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Fig. 3.1 Back Panel Level Controls
3.5 Filter Cleaning
A dust filter is provided on the unit’s air intake. If it be- comes clogged, the unit will cool less efficiently and may produce lower output levels. To clean the filter, use a phillips screwdriver to remove the three screws the secure the front grille. Use mild dishwashing deter- gent and warm water for best cleaning results. Be sure the filter is dry before you reinstall it. Replacement fil- ters may be ordered from the factory.
Dust filters are not 100%
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