Luxman
Luxman L-507Z Integrated Amplifier
Luxman L-507Z Integrated Amplifier
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L-507Z
The integration of sophistication and technical evolution. Introducing our innovative Z series.
Our latest amplification feedback engine brings music to life with LIFES Version 1.0
Luxman will celebrate our 100th anniversary in 2025 and we are proud to announce the successor to our ODNF* feedback circuitry, which has contributed to the audio quality of our amplifier products since 1999. We have developed a new amplifier feedback circuit, LIFES*, which has acquired realistic, fresh and rich musicality and overwhelming audio performance. LIFES is based on the technical concept of our epoch-making ODNF circuit and realizes excellent, dynamic characteristics without feeding back any of the original audio input signal to the main amplifier, achieving a remarkably natural sound quality, almost if it were a non-feedback equipped circuit. The design has been conceived and expanded upon from first principles using simulation technology and painstaking research. By repeatedly auditioning, rigorously scrutinizing and combining specially selected components, we have achieved supreme performance characteristics and a level of quality suitable for use in Luxman’s next-generation products. In producing LIFES Version 1.0, by carefully reimagining the entire circuit, we succeeded in reducing the number of paralleled elements while improving performance. The distortion in the amplification stage has been reduced to less than half of our previous system. The output stage features a 3-stage Darlington triple-paralleled push-pull configuration and achieves a class AB power output of 110W+110W (8Ω) and 210W+210W (4Ω). The high output power, comparable to that of a separate power amplifier, effortlessly realizes a natural soundstage, full of energy, to confidently drive any compatible speaker system, and bring out the best of its characteristics.
*LIFES stands for “Luxman Integrated Feedback Engine System”.
Large needle VU level meter and 7-segment LED
Needle-type analog VU meters are a symbolic design statement of Luxman’s solid state integrated amplifiers. The L-507Z is equipped with a large dual meter with bright LED back-lighting and high response characteristics. We have adopted such a display so the movement of the needles synchronizes with the dynamics of your music. In addition, newly included 7-segment LEDs display the attenuation level in between the left and right level meters so that the current attenuation amount can be easily seen from the listening position. The level meter back-lighting and LED display can be turned on and off using the remote control.
Precision hairline finished aluminum top panel
The rectangular chassis housing design features an ultra-thick front panel with a high-quality, blasted white finish. This has become a brand identifier of current Luxman products, with a delicate hairline finished aluminum top panel, a luxurious exterior design adopted for our high-grade amplifiers. The large ventilation slots on the top panel provide sufficient air flow and the entire chassis housing is fabricated from aluminum panels, providing excellent heat dissipation, ensuring the stable operation of this product.
New LECUA1000
Luxman’s New LECUA1000 88-step, electronically controlled attenuator is integrated into the amplifier circuit minimizing sound quality degradation over the full range of volume control. The output section of the preamplifier is equipped with discrete buffer circuitry that confidently drives the subsequent power amplifier stage.
Highly regulated power supply circuit
A highly stable, custom made EI-type power transformer and newly developed, large-capacity filter capacitors (10,000μFx 8) are combined in the power supply unit, which provides instantaneous current supply and voltage stability, easily meeting the demands of dynamic music reproduced through capable speakers.
Luxman’s original technologies
The L-507Z employs many of Luxman’s unique technologies. Beeline construction directs audio input signals via the optimum shortest route through to the speaker output and non-angled circuit board tracing realizes smooth current transmission. A loop-less chassis structure isolates the effects of ground impedance.
Various functions, switching and controls
The L-507Z features a variety of functions, such as the built-in, newly developed MM/MC compatible phono amplifier circuit that supports high-quality analog playback. Sensitive tone controls, L balance control and a loudness function are convenient for sound quality adjustments. The separate function uncouples the pre and power amplification system and a new mute button has been added to the front panel.
Newly designed parallel headphone outputs
In addition to the standard φ6.3mm output, a new φ4.4mm output has been added, with independent left and right ground wiring that greatly improves L-R separation for the listener who wants to enjoy truly three-dimensional sound.
High-quality input terminals
The RCA input terminals for LINE-1 are made from a copper alloy which delivers the conductivity of copper and durability of brass, providing support for audiophile grade cables (20mm pitch for LINE-1 and 18mm pitch for LINE2, 3 and 4).
Low impedance transmission
Large, low resistance, parallel-configured speaker relays transmit the high driving force of a large- scale output circuit without loss. The damping factor has also been improved by direct wiring to the speaker terminals using our proprietary OFC wire that realizes natural signal transmission.
Cast iron feet
The cast iron feet easily support the weight of the L-507Z and they protect delicate music signals from unnecessary vibration due to a characteristic of the design’s density gradient, gradually decreasing from the center to the periphery, which makes resonance less likely to occur.
Ergonomic aluminum remote control
The substantial, ergonomic aluminum alloy remote control can also operate compatible LUXMAN CD players released after 1996.
Specs
| Rated output | 110W+110W（8Ω） 220W+220W（4Ω） |
|---|---|
| Input sensitivity/ input impedance |
PHONO（MM）: 2.5mV / 47kΩ PHONO（MC ）： 0.3mV / 100Ω LINE: 180mV / 47kΩ BAL.LINE: 180mV / 79kΩ MAIN IN: 1.05V / 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): 91dB or more PHONO (MC): 75dB or more LINE: 105dB or more |
| Volume adjustment | New LECUA1000 |
| Amplification feedback circuit | LIFES 1.0 |
| Output configuration | Bipolar 3-parallel push-pull |
| Damping factor | 300 |
| Max. amount of tone control | BASS: ±8dB at 100Hz TREBLE: ±8dB at 10kHz |
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|---|---|---|
| Power supply | 230V~(50Hz) / 115V~(60Hz) | |
| Power consumption | 350W 886W (under no signal), 0.4W (at standby) |
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| External dimensions | 440(W) x 178(H) x 454(D) mm front side knob of 20mm and rear side terminal of 27mm included in depth |
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| Net weight | 25.4kg (main unit) | |
| Accessories | Remote control (RA-17A) Power cable |
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| Speaker terminal Supported Y-lug terminal dimension |
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New LECUA*1000 computerized attenuator
The New LECUA1000 is the most important part of the pre-amplifier section and handles volume adjustment of sound signals at micro levels. A computerized attenuator, the New LECUA1000 is an integral part of the amplifier circuit and performs in the same way as the high-end C-900u LUXMAN control amplifier. The New LECUA1000 enables the volume to be adjusted smoothly and finely in 88 steps thereby minimizing the deterioration of the sound quality. In addition, a 3D layout has been introduced in the New LECUA1000 allowing the substrates to be placed in three dimensions. A direct connection between the attenuator circuit and amplification circuit is made to minimize the signal transmission route and improve efficiency. What is more, this type of design is insensitive to external vibration, eliminates any change in sound quality depending on the position and durable so that it will not decline with the passage of time.
*LECUA stands for "Luxman Electronically Controlled Ultimate Attenuator".
ODNF* Version 4.0 innovative amplification feedback circuit
An integral part of the design of the L-507uXII is LUXMAN’s original ODNF amplification feedback circuit. This features a fast-primary slew rate and an ultra-wide bandwidth that is achieved through the feedback of distortion components only from the amplification output circuit. The latest version of ODNF–Version 4.0–is used, resulting in a dramatic enhancement of accuracy in distortion detection, lower impedance and a higher S/N ratio due to a parallel first stage and Darlington connected second stage of the amplification circuit, as well as a 3-parallel first stage error detection circuit. A 3-parallel push-pull structure output stage achieves complete output linearity of 110W+110W (8Ω) and 210W+210W (4Ω). This type of circuit can achieve high power ratings that are comparable to a separate amplifier and has the force to drive various speaker systems to deliver high grade sound reproduction.
*ODNF stands for "Only Distortion Negative Feedback".
Enhanced high capacity power supply
The higly stable power supply of the L-507uXll consists of a large capacity EI-core type power transformer and 4 pieces of customized 10,000 μF capacitor blocks. This ensures an instantaneous, constant and stable current that will exhaustively deliver sound dynamism.
Discrete buffer circuit
The L-507uXII features a new discrete,embedded buffer circuit mounted on the output stage of the pre-amplifier circuit that is equivalent to the type used in the high-end C-900u. This helps to protect the purity of the audio signal whilst enhancing the drive force of the power amplifier unit.
Low impedance transmission
Large-capacity, low resistance speaker relays are connected in parallel to enable lossless transmission for the powerful driving force that is generated by the large-scale output circuit. In addition, the damping factor has been improved from 205 to 260 by directly connecting to the speaker terminals thus enabling a dynamic sound expression.
Original technologies prioritize sound quality
To realise a smooth, stress free signal transmission LUXMAN use an original Beeline construction that is a non-angled wiring pattern to allow the signal transmission to take the shortest optimal route. This is one of many examples of a LUXMAN original design that makes sound quality a priority.
A wide variety of custom-made parts for high sound quality
OFC wires are used in the internal wiring of the L-507uXII to achieve a natural signal transmission due to the spiral wrap shielding on each core and non-plating process on the core wire. This model is generously equipped with many custom-made parts designed to achieve high sound quality such as Y lugs for a secure connection.
An abundance of user-friendly functions
The L-507uXII is equipped with a high-quality phono amplifier that is compatible with MM/MC cartridges. This model offers all the functions that a high quality integrated amplifier should offer such as bass/treble tone control, LR balance adjustment using LECUA, pre/power separation function, volume function and headphone output to name a few.
New customized gradation cast iron Insulator
Gradation cast iron legs that are used for the LUXMAN 900 series separate amplifier are fitted to eliminate resonance for the L-507uXII, taking thorough countermeasures against vibration. The solid loopless chassis with horough grounding adds to the structural stability and therefore sound quality.
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