1. Introduction
Thank you for choosing the LUX AS-55 Speaker Selector. This high-quality system selector is engineered to allow you to fully experience the essence of audio. It features a sound-quality-first design that meticulously switches the earth circuit along with the signal, ensuring minimal degradation. Constructed with a grade comparable to high-end separate amplifiers, the AS-55 offers uncompromising attention to sound quality. This manual provides essential information for the proper setup, operation, and maintenance of your AS-55 unit.
2. Safety Precautions
Please read and understand these safety instructions before operating the unit to prevent injury to yourself or others and damage to your equipment.
- Power: Ensure the unit is disconnected from all power sources before making any connections or performing maintenance.
- Ventilation: Do not block ventilation openings. Allow adequate space around the unit for proper airflow to prevent overheating.
- Moisture: Do not expose the unit to rain, moisture, or excessive humidity. Keep liquids away from the unit.
- Placement: Place the unit on a stable, level surface. Avoid placing it near heat sources or in direct sunlight.
- Connections: Ensure all speaker and amplifier connections are secure and correctly polarized to prevent short circuits or damage.
- Servicing: Do not attempt to service this unit yourself. Refer all servicing to qualified service personnel.
3. Package Contents
Verify that all items are present in the package:
- LUX AS-55 Speaker Selector Unit
- User Manual (this document)
- Warranty Card (if applicable)
4. Product Overview
The LUX AS-55 is a robust and elegantly designed speaker selector, allowing you to connect multiple speaker systems to a single amplifier or multiple amplifiers to a single speaker system, depending on your configuration needs. Its gold finish and solid construction reflect its high-quality build.

Figure 4.1: Front view of the LUX AS-55 Speaker Selector, showcasing its gold finish and central rotary knob for speaker selection.
Front Panel Controls:
- Rotary Selector Knob: Used to select between connected speaker systems (A, B, C) or amplifier inputs.
Rear Panel Connections:
The rear panel features robust binding posts for connecting your amplifier(s) and speaker systems. The AS-55 supports up to three speaker systems (A, B, C) for switching from a single amplifier, or can be configured to switch between multiple amplifiers to a single speaker pair.
- Amplifier Input Terminals: Connect your amplifier's speaker outputs here.
- Speaker Output Terminals (A, B, C): Connect your individual speaker pairs to these terminals.
5. Setup
Follow these steps to properly set up your LUX AS-55 Speaker Selector:
- Power Off All Equipment: Before making any connections, ensure your amplifier and all audio components are turned off and unplugged from the power outlet.
- Connect Amplifier: Connect the speaker output terminals of your amplifier to the



