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Luxman L-509X
ODNF* Version 4.0 - innovative amplification feedback circuit
An integral part of the design of the L-509X is LUXMAN's original ODNF* amplification feedback circuit, featuring a high-speed primary slew rate, an ultra-wide bandwidth and a low level of distortion that is achieved by feeding back only the distorted components of the audio signal from the output of the amplification circuit. The L-509X is equipped with the latest Version 4.0 ODNF providing a dramatic enhancement of accuracy in distortion detection due to the triple-paralleled first stage error detection circuit. Lower impedance and a higher signal to noise ratio have been achieved due to the paralleled first stage and Darlington equipped second stage amplification circuit. A 3-stage Darlington circuit and a 4-parallel push-pull structure is used for the output stage, similar to the M-700u power amplifier. This achieves output at 120W+120W(8Ω) and 220W+220W(4Ω), enabling the L-509X to drive speakers powerfully with rich dynamics and full expression. *ODNF stands for “Only Distortion Negative Feedback”.
Chassis structure exemplifies excellence in function and design
The L-509X features a top panel with a beautiful hair-line finish and widened venting to improve heat dissipation. The loop-less chassis structure restricts any increase in ground impedance. Analog level meters, illuminated with white LEDs, add to the elegant and stylish appearance.
An abundance of user-friendly functions
The L-509X is equipped with a high-quality phono amplifier, compatible with MM and MC cartridges. This model offers all the functions that a high quality integrated amplifier should, including bass and treble tone controls, L/R balance adjustment controlled by LECUA, pre/power separation function, volume control and headphone output, all integrated into a single unit without compromising sound quality.
Copper alloy terminals
High quality RCA terminals, made of copper alloy, are used for the LINE-1 inputs of the L-509X, combining the beneficial conductivity of copper and durability of brass. The L-509X features many custom-made components befitting a flagship model, such as the robust power supply and high-grade speaker terminals that are compatible with Y-connectors.
Gradation cast-iron feet
Thorough vibration countermeasures have been taken, using cast iron feet with a density gradient to eliminate resonance. The high grade, aluminium body remote control is also supplied as standard.
High stability power supply
The highly stable power supply circuit developed for the L-509X features a 600 VA EI-core-type power transformer and independent left and right channel large capacity blocking capacitors (10,000μFx4 per channel). This generous custom specification ensures that the power supply unit will not be affected by any load fluctuation.
Discrete buffer circuit
The L-509X is equipped with a discrete buffer circuit that is equivalent to the type used in the high-end LUXMAN C-900u separate amplifier. The clarity of the audio signal is preserved by this circuit whilst at the same time the following power amplification stage's driving force is significantly increased.
Prioritizing audio quality in design
The use of crack-resistant peel coat PCBs for the amplifier boards prevent the quality of audio signals being adversely affected. This product prioritizes audio quality in features such as the non-angled, direct wiring pattern, known as the original LUXMAN’s Beeline construction, ensuring smooth signal transmission via the optimum shortest route.
Increased damping factor
Large-capacity, low resistance speaker relays are connected in parallel, enabling loss-less transmission of the powerful driving force that is generated by the generous power supply circuit and the amplifier output section of the L-509X. The use of 3.5mm2 cabling for the amplifier board output and the unit's damping factor of 370 enables the L-509X to drive all kinds of speakers accurately.
New LECUA*1000 computerized attenuator
LUXMAN's New LECUA1000 is at the heart of the preamp section and the volume adjustment control of the L-509X. This computerized attenuator is integrated with the amplification circuit, a feature integral to the high-end LUXMAN C-900u control amplifier. LECUA provides an ideal level control system which allows smooth and fine adjustment of the volume over 88 steps, thereby minimising the deterioration of audio quality at any point of the volume adjustment range. An advancement of the New LECUA1000 is the 3D design layout. The attenuator circuit board is directly connected to the amplification circuit board. Signal routing has been minimized andefficiency has been successfully enhanced. In addition, this design is extremely resistant to external vibration and eliminates changes in audio quality over the volume control range. The robust nature of this system ensures longevity and durability. *LECUA stands for “Luxman Electronically Controlled Ultimate Attenuator”.
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Professional Reviews 92/100
Deliciously Crispy
Sound Quality
94/100
Build Quality
93/100
Features Connectivity
89/100
Value for Money
90/100
Luxman’s refined, controlled sound gives the L-509X its appeal: reviewers from HiFi News and SoundStage! Hi-Fi Editors praise its rich midrange, tight bass, and spacious imaging, while TONEAudio MAGAZINE highlights its warmth and punch. Add the luxurious build and versatile analog feature set, and it feels purpose-built for long-haul listening.
What Reviewers Are Saying
Pros
Rich, natural midrange with excellent clarity and vocal realism.
Tight, controlled bass and strong composure as volume rises.
Broad, deep soundstage with strong separation and low listening fatigue.
Excellent build quality and tactile, luxurious controls that feel truly high-end.
&
Cons
No built-in DAC, so it is less convenient than many modern integrated amplifiers.
Phono stage loading flexibility is limited compared with more adjustable rivals.
SOUND QUALITY PERFORMANCE 94/100
Reviewers consistently describe the L-509X as refined, musical, and highly capable, with enough detail to satisfy demanding listeners without turning harsh or clinical. The sound is repeatedly called sweet, rich, controlled, and relaxed, with strong composure as the music gets louder and a presentation that keeps its character intact across different speakers and genres.
Transparency Resolution
93/100
Reviewers praise the amp for delivering a lot of information while still sounding smooth, with comments about a low noise floor, revealing air around voices, and the ability to hear deeply into the music. It is not framed as aggressively hyper-revealing, but the detail retrieval is clearly first-rate.
Tonal Balance Musicality
95/100
This is one of the most consistently praised aspects: the amplifier is described as sweet, refined, warm-saturated, gorgeous in the midrange, and easy to listen to for long sessions. Reviewers stress that it avoids fatigue while keeping instruments and voices full, natural, and emotionally persuasive.
Dynamics
95/100
Across multiple reviews, the L-509X is credited with real punch, strong composure, and the ability to drive speakers confidently without strain. Reviewers note that it can rock, keeps control of woofer motion, and maintains its character as volume rises, though one reviewer frames it as more relaxed than brute-force aggressive.
Soundstage Imaging
93/100
The soundstage is repeatedly described as broad, deep, and detailed, with strong ambience and a convincing sense of space around voices and instruments. Reviewers also praise its ability to preserve the character of different speakers and to separate layers in dense mixes without smearing them together.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
93/100
Reviewers are strongly positive about the chassis, controls, and finish, calling the casework exquisitely finished, the metalwork luxurious, and the overall feel precise and substantial. The comments are enthusiastic and consistent, but they stop short of suggesting a once-in-a-generation level of construction.
Features Connectivity
89/100
For an analog integrated amp, it is very well equipped: four RCA line inputs, two balanced XLR inputs, MM/MC phono, pre-out/main-in jacks, tape/record loop, tone controls, loudness, remote control, headphone output, and speaker switching. Reviewers do note the lack of a built-in DAC and limited phono loading flexibility, which keeps it from feeling fully universal.
Value for Money
90/100
Several reviewers explicitly praise the value, calling it a stunning bargain and saying they would prefer it to commensurately priced separates. Even at a high asking price, the consensus is that it delivers a very compelling mix of sound, build, and usability for the money in its class.
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Authorized dealers for Luxman L-509X
- Acoustic Sounds — online and in-store — Salina, Kansas, United States (website)
- Acton Gate Audio — online and in-store — Cymru, United Kingdom (website)
- All Elite Audio — online and in-store — Perry Hall, Maryland, United States (website)
- Alpha High End — online and in-store — Brasschaat, Vlaams Gewest, Belgium (website)
- Alta Fedelta — online and in-store — Lombardia, Italy (website)
- Analog Emporium - GEM Dandy — in-store — Memphis, Tennessee, United States (website)
- Analog Matters — online and in-store — Ormond Beach, Florida, United States (website)
- Analogue Seduction — online and in-store — Whittlesey, England, United Kingdom (website)
- Arizona Hi-Fi — in-store — Phoenix, Arizona, United States (website)
- Art & Voice — online (website)
and 126 more verified dealers