Luxman MS-11 (1974)

The MS-11 weighs 8.6kg and stands just over half a meter tall. It is a small cabinet with serious engineering inside.

Overview

The Luxman MS-11 is a bookshelf type speaker system that Luxman introduced in 1974 as part of its high-end audio lineup. It is not a conventional reflex or sealed box. It uses a multi-vent tuning method that changes how cabinet pressure affects bass response. Many manufacturers at the time chased raw output or flashy cosmetics. The MS-11 went for precision engineering and musical transparency instead.

The MS-11 is rated at 25W, with a maximum input of 60W. That suited the high-end integrated amplifiers common in the 1970s. Its 6 Ω impedance is a stable load, but not an easy one to drive, so it wants an amplifier with solid current delivery. The frequency range runs 50 Hz to 20 kHz. That is not earth-shaking by modern standards, but it was competitive for a compact two-way system of its era.

Specifications

Key Features

Multi-Vent Tuning System

The MS-11 enclosure is a sealed structure with multiple small vent holes that regulate internal air pressure. The idea is to avoid the over-damped sluggishness of a pure sealed box and the resonant peaks typical of bass reflex designs. With the pressure more controlled, the system reduces diaphragm strain and minimizes distortion, particularly in the lower midrange, where cabinet behavior often clouds detail. It is mechanically simple, but acoustically deliberate.

20 cm Aramid Cone Woofer with Precision Construction

The low- and mid-frequency driver has a 20 cm cone made from an aramid fiber net. A special agent coats it to add rigidity while keeping it light. Aramid, known for its strength-to-weight ratio, is also used in the damper for tight mechanical control. The frame is die-cast aluminum and open-behind, designed to eliminate trapped air turbulence that can interfere with cone movement. A 110 φ mm ferrite magnet provides the driving force, and a Nomex voice coil bobbin handles heat buildup. The edge is polyurethane foam, which balances flexibility and durability.

2.5 cm Matrix Cloth Dome Tweeter

The high-frequency unit is a 2.5 cm dome type. Its diaphragm is built from a newly developed matrix cloth structure. Each fiber is pre-impregnated with a molding agent, so the rigidity is uniform and needs no post-treatment or backing materials like glass wool. This reduces internal resonance and breakup artifacts, which gives a clean, extended top end. There is no added damping material on the rear either, which suggests confidence in the inherent stability of the design.

Phase-Optimized Crossover Network

Luxman engineers targeted phase distortion near the crossover point, set at 3kHz. The network is designed to align the acoustic output of the woofer and tweeter as closely as possible in both amplitude and timing. The exact topology isn't detailed. The emphasis on phase coherence points to a design built around time-domain accuracy, a trait often associated with more transparent, lifelike imaging.

Historical Context

Luxman launched the MS-11 in 1974, part of a high-end audio movement defined by Japanese precision and analog refinement. It sat in Luxman's premium lineup as a technically sophisticated alternative to conventional speaker designs. Brands of the period competed on subtlety of execution rather than sheer power or size.

eBay Listings

McGoham MS-11 1 Watt Amplifier

$13.96

Vintage McGohan 1 Watt Amplifier Model MS-11

$25.01

Audio-Technica ATN-120ea MM Cartridge & Stylus & AT MS-11 Ca

$159

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