Luxman L-550AX Integrated Amp
Truly Lossless Volume Control and Superior Audio Circuitry
The L-550AX is the second of the X-Series of pure Class A solid-state integrated amplifiers to
conquer the high-end market. With an illuminated central oriented VU meter in its solid, symmetrical front fascia, the L-550AX incorporates the LECUA 1000 high precision electronically controlled attenuator, the latest ODNF 3.0A audio circuit and custom passive components as used in 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. 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.
The 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 only inherent of pure Class A operation.
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.