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General| Type | Tube Amplifier |
|---|---|
| Power Output | 400 Watts |
| Tube Type | 12AX7 |
| Preamp Tubes | 4 x 12AX7 |
| Weight | 45 lbs |
| Dimensions | 23.5" x 10.5" x 11.5" |
| Inputs | 1 x 1/4" Instrument Input |
| Speaker Outputs | 2 x 1/4" Speaker Outputs |
| Speaker Configuration | 4 x 8" Speakers |
Basic instructions for safe operation, handling, and electrical safety.
Guidelines for placement, ventilation, and avoiding water or heat exposure.
Guidance on plugs, grounding, power cords, and referring servicing to qualified personnel.
Precautions regarding sunlight, high temperatures, loudness, and tube handling.
Guidelines for rack mounting ventilation and warnings about incorrect standby switch usage.
Crucial advice on always connecting a speaker load to prevent amplifier damage.
Details on speaker outputs, impedance matching, and the auto-mute protection feature.
Further explanation of the AUTO-MUTE circuit and the critical need for speaker loads.
Interface for connecting to consoles or recording devices, with PRE/POST signal options.
Explanation of when bias adjustment is required and the amplifier's system for setting it.
Instructions for setting the bias, differentiating between OPERATE and SET BIAS modes.
Step-by-step guide for non-technicians to set the amplifier's bias for optimal performance.
Explanation of amplifier impedance ratings, safe ranges, and the effects of mismatches.
Methods for calculating the total impedance load for multiple speakers.
How to wire speakers in series for additive resistance and optimal load.
How to wire speakers in parallel for decreased resistance and combined load.
Combining series and parallel wiring for complex speaker configurations.
Diagram showing correct wiring for an 8 Ohm cabinet.
Diagram showing correct wiring for a 4 Ohm cabinet.
Addressing pre-amp tube issues like noise, microphonics, and driver tube problems.
Identifying and troubleshooting power tube faults like shorts and noise.
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