Welcome to the world of high-end audio. If you are just getting started, you have probably noticed that the hobby comes with a lot of jargon and a lot of intimidating-looking boxes. The good news is that some components are wonderfully simple, and the Luxman AS-55 is one of them. It solves a very practical problem in an elegant way, and once you understand what it does, you will see exactly where it fits in your system. Let us walk through it together, in plain language.
What Is the Luxman AS-55?
What exactly is a passive speaker level switch?
A passive speaker level switch is a simple box that lets you connect one amplifier to several pairs of speakers, or several amplifiers to one pair of speakers, and choose between them with a rotary knob. The AS-55 is Luxman's version of this handy tool. Think of it as a well made junction, or a traffic controller, sitting between your amplifier and your speakers. It does not process, boost, or change the sound. It simply routes the connection wherever you turn the dial.
What does "passive" mean, and why does it matter here?
"Passive" means the AS-55 has no active gain stage, so it does not add any amplification or electronics to the signal path. Your amplifier still does all the work of driving the speakers. The AS-55 only makes and breaks connections. This is important because a fully passive design has nothing to add noise or coloration of its own. The music passes straight through the internal wiring and the switch, and nothing else. For anyone worried that adding a box to their system might degrade the sound, this is reassuring news.
What does the AS-55 actually let me do?
The AS-55 switches one amplifier to three speaker pairs (one pair at a time), or three amplifiers to one speaker pair. That covers the two most common real-world scenarios. In the first setup, you might have one favourite amplifier and want to compare or use different speakers in the same room, or send music to speakers in different rooms one at a time. In the second setup, you might own several amplifiers and want to compare how each one sounds through the same pair of speakers, without crawling behind your rack to swap cables every time. You just turn the knob.
Why can it only select one pair at a time?
The AS-55 is designed to connect one path at a time, not to run several pairs of speakers simultaneously. This is a deliberate and sensible choice. Running multiple speaker pairs at once can change the electrical load your amplifier sees, which can stress the amplifier and affect the sound. By switching cleanly to a single path, the AS-55 keeps everything simple, safe, and predictable. Your amplifier always sees a normal, sensible connection.
The Controls and Connections
How do I connect my cables to it?
The AS-55 uses gold-plated binding posts that accept bare wire, spade lugs, and banana plugs. In plain terms, a binding post is the terminal you attach a speaker cable to, and this model works with the three most common types of cable ends. If your speaker cables have bare stripped wire, they will work. If they end in flat U-shaped spade lugs, they will work. If they end in round banana plugs that push straight in, they will work too. The gold plating resists corrosion over the years, which keeps the connection clean and reliable.
What is the rotary selector, and how does it work?
The rotary selector is the knob on the front that chooses which connection is active, and it is rated to handle up to 20 amps of current. When you turn it, a mechanical switch inside physically routes the signal from the input to the output pair you have selected. A 20 A rating means the switch is built to handle the substantial current that flows through speaker cables when you play music at real volume. This is a robust, generously specified switch, not a delicate one.
What is the internal wiring made of, and why should I care?
The inside of the AS-55 is wired with 6N pure copper, which means the copper is 99.99997 percent pure, and it is oxygen-free copper (often shortened to OFC). Since your music signal passes through this wiring on its way to the speakers, the quality of that wire matters. Very pure, oxygen-free copper is prized in high-end audio because it carries the signal cleanly with minimal resistance and minimal interference. Luxman did not cut corners here. Even though this is a simple switching box, they wired it with the same care they put into their amplifiers.
Understanding the Key Specifications
How big is it, and where will it sit?
The AS-55 measures 370 mm wide, 71 mm high, and 164 mm deep. In everyday terms, it is a compact, low-profile box that is a little wider than it is deep, and only about the height of a couple of paperback books stacked together. That makes it easy to place on a shelf, tuck onto a rack, or set beside your amplifier. It is not a large component, which suits its role as a helpful addition to a system rather than a centrepiece.
How heavy is it, and what does the weight tell me?
The AS-55 weighs approximately 3.0 kg. That may sound modest, but for a box that contains only wiring, terminals, and a switch, it reflects solid construction and quality parts rather than lightweight, hollow materials. A reassuring weight in your hands is often a sign of a sturdy chassis and substantial internal hardware, and the AS-55 feels like the well built Luxman product it is.
Where is it made?
The AS-55 is made in Japan. Luxman builds its components in Yokohama, and that attention to careful assembly and quality control extends to even the simplest products in the range. Country of origin is not just a detail. It reflects the standards and consistency you can expect from the finished product.
Why Luxman Build Quality Matters
Who is Luxman, and why does their reputation matter for a switch box?
Luxman, founded in 1925 in Japan, is one of the oldest and most respected names in high-end audio. That heritage matters even for something as straightforward as a speaker switch. Luxman is known for heavy, high-rigidity chassis, precision machined aluminium panels, careful grounding, and thoughtful engineering throughout their range. Many current models even carry Centennial editions marking the company's 100th anniversary. When a company with this pedigree makes a passive switch, they treat it with the same seriousness as their amplifiers, from the purity of the internal copper to the quality of the terminals.
Will putting the AS-55 in my system harm the sound?
A well made passive switch like the AS-55 is designed specifically to preserve the sound, not to alter it. Because there is no active circuitry, nothing is added to your signal. The very short, very pure copper wiring path and the high-current rotary switch are chosen to let the amplifier's output reach your speakers with as little compromise as possible. This is exactly why choosing a quality switch from a serious brand matters. A poorly made switch could introduce resistance or unreliable contacts, while the AS-55 is engineered to stay out of the way.
Who Is the AS-55 For?
Should I add an AS-55 to my system?
The AS-55 is ideal for anyone who wants to connect more than one pair of speakers or more than one amplifier without constantly rewiring their system. If you like comparing gear, the AS-55 lets you switch between three amplifiers into one pair of speakers at the turn of a knob, which makes honest comparisons easy. If you have speakers you love in different setups or rooms, it lets one amplifier feed three pairs, one at a time. It is also perfect for the enthusiast who is building a system gradually and wants flexibility without clutter.
In short, the AS-55 is a small, beautifully made problem-solver. It gives you flexibility and convenience while respecting the quality of your music. For a newcomer, it is one of the friendliest ways to expand what your system can do, backed by nearly a century of Luxman engineering. If you have been wishing you could switch speakers or amplifiers without the hassle of unplugging cables, this quietly capable box is exactly what you have been looking for.