Luxman L-550AX Integrated Amplifier

Pure Class A Integrated Amp with Truly Lossless Volume Control & Superior Audio Circuitry

 "Boasting classic looks and features (e.g. balance, tone, and loudness controls) that hark back to the great designs of the sixties, magnificent build, and absolutely gorgeous sonics, this Japanese import is my kind of integrated amplifier. With a rated 20 wpc of pure Class A power (though in reality delivering considerably more), the L-550A II has more than enough muscle to drive even my low sensitivity Quad  2805s to levels loud enough to satisfy me on almost any music, and the finesse, delicacy and low distortion to make a marriage with these speakers as if ordained in heaven. With its superb tone controls, this is a unit for music lovers as opposed to audiophiles (though for purists, a front-panel button provides straight through operation). "  -  The Absolute Sound June/July 2008  (Reviewed in Issue 177)   Paul Seydor.

The Luxman L-550AX is a state-of-art integrated amplifier featuring excellent engineering, extreme rigidity, elaborate circuit design and layout for the shortest signal path. In addition, it possesses beguiling sound that only pure Class A operation can offer.

LECUA 1000 Attenuator

The L-550AX incorporates the LECUA 1000 high precision electronically controlled attenuator, the latest ODNF 3.0A audio circuit and custom passive components borrowed from Luxman’s flagship C-1000f control amplifier and B-1000f mono power amplifier. The LECUA 1000 attenuator is configured to electrically block electromagnetic (EMI) and radio frequency (RFI) interferences. The output signal is attenuated without introducing artifacts inherent of conventional volume controls, thereby resulting in constant output impedance, high signal-to-noise ratio, a uniform frequency response and lowered distortion.

Luxman ODNF

As its name implies the ODNF (Only Distortion Negative Feedback) only applies negative feedback where distortion is present to reduce coloration more effectively. This lossless audio circuit enables the amplifier to retrieve every musical nuance captured by recording engineers. Transient response, attack, dynamic contrast, timbre, inner detail, and bass authority are preserved. The reproduced sound is simply spellbinding.

Regulated Power Supply

A heavily regulated power supply comprises an over-sized power transformer and ample 40,000μF filtering capacitor array. Notwithstanding its 2 x 20W modest power rating, the L-550AX is capable of driving virtually any speaker load.

Specifications