Luxman L-505Z is the newest integrated amplifier in the X series. The L-505Z replaces the L-505UXII, which was superseded in 2022. This sits just below the L-507Z and produces 2 x 100 watts into 8ohm.
Luxman L-505Z Intergrated Amplifier
The L-505Z, like the L-509Z and L-507Z, is equipped with our “LIFES” high quality amplification feedback engine, a feature integral to our next generation of 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 combining carefully selected components and through repeated listening tests, we have achieved the ultimate performance and sound quality, truly worthy of being adopted for LUXMAN’s next-generation components. In LIFES Version 1.0, the entire circuit has been reconstructed and simplified, improving performance, whilst also 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, achieving ample Class AB power of 100W+100W (8Ω) and 150W+150W (4Ω).
The volume control section is crucial to both the functionality and performance of an integrated amplifier 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 minimizes variations in audio quality and enables smooth and detailed volume adjustment over 88 steps. The LR balance adjustment control also relies on LECUA’s volume shift function. Despite multitasking, LECUA succeeds in minimizing 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.
The concept of a “power amp driver” is fundamental to the design of a preamp section, outputting an energy-rich signal is its ideal state of operation. The L-505Z is equipped with discrete buffer circuitry and high current supply capability at the output of 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 reestablishment of vinyl record playback as an important contemporary source, a high-quality MM/MC compatible phono EQ amp circuit with a parallelized first stage is provided to realize supreme analog playback similar to our other high-end components.
The power supply is the beating heart of an amplifier and must supply instantaneous current and stable output voltages. The L-505Z 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.
Like our higher-end models, the L-505Z 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
Luxman L-505Z is the newest integrated amplifier in the X series. The L-505Z replaces the L-505UXII, which was superseded in 2022. This sits just below the L-507Z and produces 2 x 100 watts into 8ohm.
Specifications:
Rated output 100W+100W(8Ω), 150W+150W(4Ω)
Input, separate input/output 4 lines, 1 phono system (MM/MC switching), 1 balanced line, 1 separate input/1 output
Speaker output A, B2 systems (AB simultaneous output possible)
Volume adjustment LECUA
Amplifier circuit, output configuration LIFES 1.0, bipolar parallel push-pull
Input sensitivity/input impedance PHONO: (MM) 2.5mV/47kΩ, (MC) 0.3mV/100Ω, LINE: 180mV/47kΩ, BAL LINE: 180mV/55kΩ
Total harmonic distortion rate: 0.009% or less (1kHz/8Ω), 0.09% or less (20Hz to 20kHz/8Ω)
S/N ratio, frequency characteristics LINE: 104dB or more, 20Hz to 100kHz (+0, -3.0dB)
Attached equipment [Front panel] Power switch, input selector, volume, headphone jack (Φ6.3/Φ4.4mm), speaker selector (OFF/A/B/A+B), tone control (BASS/TREBLE), LR balance, LR meter, volume level LED, separate, cartridge (MM/MC), line straight, remote control receiver
[Can only be operated with remote control] Loudness, mute, meter display
[Rear panel] Input/output terminal, ground terminal, balanced phase switch, trigger terminal, control terminal, AC inlet
Power consumption 270W (Electrical Appliance and Material Safety Law), 85W (when no input is applied), 0.5W (when in standby)
Maximum external dimensions, mass 440 (W) x 178 (H) x 454 (including 20 front knobs and 27 rear terminals) (D) mm
Weight: 22.5 kg
