LUXMAN L-509Z

Our latest amplification feedback engine literally brings music to life with LIFES* Version 1.0

By feeding back only the distorted components generated in the audio signal’s journey to the final amp stage, LUXMAN’s proprietary “ODNF” amplification circuitry achieves excellent static characteristics and natural sound quality as if it were a “non-feedback” system. During the development of the M-10X flagship stereo power amplifier launched in 2021, technical concepts explored there were retained and the circuit configuration, which had become very complex over years of improvements has been completely redesigned to realize “LIFES” exquisite, high-fidelity sound and defines an amplification feedback engine blueprint for our next generation of components. The L-509Z is equipped with independent LIFES modules operating simultaneously in each of its fully discrete pre and power sections. The L-509Z is a pre-main amplifier that is worthy of the “single-chassis separates” concept that incorporates quality seperate units into a single, elegant chassis and has achieved an elevated level of musicality and unprecedented detail in comparison to other amplification circuits. The output section utilizes three stage Darlington bipolar transistors in quadruple-paralleled push-pull configuration to achieve outstanding output power and near perfect power linearity performance comparable to a standalone power amplifier, developing 120W+120W at 8 ohms and 220W+220W at 4 ohms.The result is spectacular sound quality with an abundance of energy.

Electronically controlled attenuator LECUA-EX* incorporating an elaborate rotation mechanism

A tactile, satisfying volume control function is essential for audio amplifiers. To feed a fixed gain power amplifier with a musical signal at a level suitable for listening, precise control is required to smoothly attenuate the voltage while maintaining the quality of the input source. LECUA, developed by LUXMAN, is an electronically controlled attenuator system that switches through a series of high-quality, fixed value resistors for each channel independently. These are neatly arranged on the sub-assembly according to the position of the volume control knob. Since the release of the C-1000f control amplifier in 2006 to commemorate LUXMAN’s 80th anniversary, “LECUA1000”, which similarly integrates into the amplification circuitry, has been used in many LUXMAN products as a volume control system that minimizes the effects of external vibrations and changes in sound quality across the operating range of the volume control and is also resistant to deterioration over time. The L-509Z combines a highly precise rotary encoder with a newly developed weighted rotation mechanism to create the “LECUA-EX”, which offers even greater reliability and a natural, high-quality operational feel. 88 fine steps from 0 to 87dB and an acceleration setting for the speed at which the volume knob is rotated and a long-press setting for the remote control allow for comfortable and thorough volume control action with minimal degradation in sound quality.

Highly regulated power supply

The L-509Z is equipped with LUXMAN’s traditional, highly stable power supply circuitry, featuring a bespoke, highly regulated 600VA El transformer and newly developed large-capacity filter capacitors (10,000μFx 8) .

Spec

Rated output	120W + 120W (8Ω) 220W + 220W (4Ω)
Input sensitivity/ input impedance	PHONO (MM): 2.5mV/47kΩ PHONO (MC-H): 0.3mV/100Ω PHONO (MC-L): 0.1mV/40Ω LINE: 180mV/47kΩ BAL.LINE: 180mV/79kΩ MAIN IN: 1.1V/47kΩ
Output voltage	PRE OUT: 1V
Frequency response	PHONO: 20Hz to 20kHz (±0.5dB) LINE: 20Hz to 100kHz (within -3dB)
Total harmonic distortion	0.007% or less (8Ω, 1kHz) 0.03% or less (8Ω, 20Hz to 20kHz)
S/N ratio (IHF-A)	PHONO (MM): 87dB or more PHONO (MC-H): 70dB or more PHONO (MC-L): 62dB or more LINE: 106dB or more
Volume adjustment	LECUA-EX
Amplification feedback circuit	LIFES 1.0
Output configuration	Bipolar 4-parallel push-pull

Damping factor	330
Max. amount of tone control	BASS: ±8dB at 100Hz TREBLE: ±8dB at 760Hz TREBLE: ±8dB at 10kHz
Power supply	230V~(50Hz) / 115V~(60Hz)
Power consumption	390W 150W (under no signal), 0.5W (at standby)
External dimensions	440(W) x 193(H) x 463(D) mm front side knob of 20mm and rear side terminal of 37mm included in depth
Net weight	29.4kg (main unit)
Accessories	Remote control (RA-17A) Power cable
Speaker terminal Supported Y-lug terminal dimension	Width of part a: 16mm or less Width of part b: 7mm or more * Connection may not be performed depending on the shape of the Y-lug terminal.