Luxman L-505Z Integrated Amplifier

Luxman L-505Z Integrated Amplifier

The Luxman L-505Z Integrated Amplifier, like the L-509Z and L-507Z, is equipped with our “LIFES” high-quality amplification feedback engine, an integral feature of our next-generation amplifier designs. LIFES is based on the technical concept of our revolutionary ODNF feedback circuitry, which achieved excellent static characteristics without feeding back any of the musical input signal to the main amplifier, yielding a natural sound quality more akin to a non-feedback system. The circuit has been redesigned from scratch through multiple simulations. By carefully selecting components and conducting repeated listening tests, we have achieved the ultimate performance and sound quality, truly worthy of adoption for LUXMAN’s next-generation components. In LIFES Version 1.0, the entire circuit has been reconstructed and simplified, improving performance and successfully reducing the number of parallel elements, reducing distortion during amplification to less than half. The output stage uses a parallel push-pull configuration with bipolar transistor elements, delivering ample Class AB power of 100W+100W (8ω) and 150W+150W (4ω).

Electronically controlled attenuator LECUA

The volume control section is crucial to an integrated amplifier’s functionality and performance and requires dedicated signal processing. The L-505Z is equipped with LUXMAN’s original, high-clarity LECUA* electronically controlled attenuator, which has been significantly downsized by adopting a solid-state (IC) circuit configuration. LECUA is an ideal level control system that minimises variations in audio quality and enables smooth, detailed volume adjustment across 88 steps. The LR balance adjustment control also relies on LECUA’s volume shift function. Despite multitasking, LECUA minimises deterioration of sound quality across the full range of the volume control. Intuitive operability is maintained while linked with operations from the remote control. A traditional rotary volume knob achieves that weighty, tactile response and operational feel enthusiasts will enjoy, combining convenience with pleasing operability.

Discrete buffer circuitry for preamp

The concept of a “power amp driver” is fundamental to the design of a preamp section; outputting an energy-rich signal is its ideal operating state. The L-505Z is equipped with discrete buffer circuitry and high-current output capability at the preamplifier stage, maintaining the fidelity of delicate musical signals whilst significantly enhancing the driving energy and performance of the power amplifier stage. The input selector switch controls a switching IC with excellent separation and low crosstalk. Proudly joining our latest Generation Z series, the L-505Z has achieved a dramatic development in musicality that far surpasses its class. In addition, responding to the re-establishment of vinyl record playback as an important contemporary source, a high-quality MM/MC compatible phono EQ amp circuit with a parallelised first stage is provided to realise supreme analogue playback similar to our other high-end components.

Highly regulated power supply circuit

The power supply is the beating heart of an amplifier and must supply instantaneous current and stable output voltages. The Luxman L-505Z Integrated Amplifier is equipped with LUXMAN’s traditional, highly stable, 540VA large-capacity, EI-type power transformer, combined with four custom-made 10,000μF filter capacitors. This combination provides the instantaneous energy required to faithfully reproduce the most radical or gentlest of musical dynamics and maintain a stable voltage supply under any load fluctuations.

Large needle VU level meter and 7-segment LED

Like their higher-end models, the Luxman L-505Z Integrated Amplifier is equipped with large needle-type VU meters, highly visible with white LED back-lighting, that smoothly follow changes in the music signal. Between the left and right meters, a new 7-segment LED level display has been installed, allowing you to check the current volume level from your listening position. Using the remote control, you can turn the meter lighting and 7-segment LED on and off as you like.

Headphone terminals with independent grounding

The L-505Z’s high-quality headphone playback functions support the most intimate of listening environments. In addition to a standard φ6.3mm terminal, the L-505Z has a new φ4.4mm terminal with independent left and right ground wiring and separate unbalanced amplifiers, vastly improving left-to-right separation. By connecting compatible headphones and cables, the listener can enjoy further enhanced, three-dimensional, high-quality playback.

Various functions and input/output terminals

The Luxman L-505Z Integrated Amplifier has our proprietary tone controls, loudness, LR balance adjustment, and a separate function that facilitates bi-amp configuration with an additional power amplifier or coexistence with an AV amplifier setup, all in one unit. On the rear panel, the 18mm-pitch RCA input/output terminals are compatible with high-quality cables with large plugs, and the robust speaker terminals with an in-line layout (same LR characteristics) are compatible with Y-lugs and banana plugs.

LUXMAN’s original technology

The Luxman L-505Z Integrated Amplifier is designed with sound quality as the top priority in every detail, including non-angled wiring on the circuit boards to ensure smooth current flow. “Bee-Line” construction determines component location, providing the most logical, shortest route for audio signals to travel. Internal wiring using OFC copper cable that ensures natural signal transmission with spiral wrap shielding for each non-plated core wire, and a loop-less chassis structure which suppresses increases in ground impedance.