Lewis CaliburnAt the start of its 100th year, Japanese brand Luxman has released what it is calling its “finest integrated amplifier yet”– the L-509Z.
Introducing the manufacturer’s “single-chassis separates” concept, the new, all-in-one flagship amplifier has, according to Luxman, evolved beyond the concept of a traditional integrated amplifier.
Both the preamplifier and power amplifier sections simultaneously use the brand’s new generation amplification feedback engine, LIFES for the first time. The volume control is supported by Luxman’s new LECUA-EX attenuator system that suppresses sound quality deterioration and realises a more precise feel of operation.
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 is said to achieve impressive static characteristics and natural sound quality as if it were a non-feedback system.
The L-509Z is equipped with independent LIFES modules, operating simultaneously in each of its fully discrete pre and power sections. The L-509Z’s output section utilises three stage Darlington bipolar transistors in quadruple-paralleled push-pull configuration to achieve the desired output power and reportedly “near perfect” power linearity performance comparable to a standalone power amplifier, developing 120W+120W at 8 ohms and 220W+220W at 4 ohms.
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.
The L-509Z combines a highly precise rotary encoder with a newly developed weighted rotation mechanism to create the LECUA-EX, which offers greater reliability and a natural, high-quality operational feel, while 88 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.
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)
The built-in high-quality phono equaliser circuit, which supports both MM and MC cartridges, features a new two-step gain switch to select between high and low MC settings to accommodate a wider range of MC cartridges, enriching quality vinyl playback in terms of both operation and sound quality. And a Mute-Button is now featured on the front panel.
In addition to bass and treble, a new middle control effective in the vocal and lead instrument frequencies bandwidth has been included. LR balance, line straight, loudness, and other functions are also conveniently at the user’s fingertips.
Peel-coat circuit boards are used for the main audio signal path, eliminating the negative effects of the coating film that can adversely affect sound quality. Unique attention has been paid to every detail, such as the beeline construction, which configures circuits to take the shortest route possible, and a non-angled wiring pattern for smooth signal transmission.
Large, low resistance speaker relays are connected in parallel to transmit the driving force from the substantial power supply and output circuitry. Internal, 3.5mm2 ultra-thick cable is directly connected to the speaker terminals to ensure low impedance transmission, achieving a damping factor of 330 (current injection method).
The top panel is made of ultra-thick aluminium with a hairline finish. Large ventilation holes are carefully machined one by one to ensure efficient heat dissipation. Supporting the unit are four large insulator feet made from cast iron, their density gradient protecting the main chassis from unwanted external vibrations.
The L-509Z is equipped with two large metres, brightly back-lit by LEDs, with sensitive response characteristics. The newly included seven-segment LED display in between the left and right level metres displays the current attenuation amount and is easily visible from the listening position.
In addition to the φ6.3mm standard terminal, a φ4.4mm terminal with independent left and right grounding has been added for headphone use.
Original high rigidity RCA terminals are used for LINE-1 and 2. Separate inputs and outputs for system expansion are provided with two pre-outputs, while two large speaker output terminals with independent on/off switching allow for bi-wire connectivity.
The Luxman L-509Z is available to order now at an RRP of £11,000 including VAT via IAG UK in the UK.