Luxman L-590AXII Integrated Amplifier
The new LECUA1000 computerized attenuator
The newly developed integral LECUA1000 computerized attenuator with an 88 step amplifier circuit has been mounted in the volume adjustment unit, that is, for the first time as LUXMAN’s integrated amplifier, an essential part of the pre-amplifier circuit. This pre-amplifier circuit uses the same design as the top end control amplifier, the C-900u. The LECUA 1000 enables the sound volume to be adjusted smoothly with minimal deterioration of sound quality. A 3D layout has been introduced in the LECUA 1000 that allows substrates to be placed in three dimensions with the attenuator circuit directly connected to the amplification circuit, thereby minimizing routes and improving efficiency. Furthermore, this type of layout is extremely insensitive to external vibration and changes in sound quality caused by the volume level and has high durability.
ODNF version 4.0 innovative amplification feedback circuit
The ODNF (Only Distortion Negative Feedback) original amplification feedback circuit from LUXMAN features a fast primary slew rate and an ultra-wide bandwidth achieved through the feedback of distortion components only from output signals. The L-590AXII is equipped with the latest version of ODNF - Version 4.0 - in which the distortion characteristics at high frequencies as well as the S/N performance have been significantly improved. Version 4.0 also features a power amplifier circuit in which a 3-parallel push-pull structure with 3 stage Darlington is used, as featured in the LUXMAN M-700u power amplifier. The rated output of 30W + 30W (8 ohms) of pure Class A amplification sufficiently supports the impedance characteristics of a wide variety of loudspeakers. It is possible to achieve a mellow, expressive sound with an increased sense of density with drivability to speaker systems that is equivalent to separate amplifiers.
* ODNF is an abbreviation for “Only Distortion Negative Feedback”.
Large-capacity power supply circuit
A high inertia power supply circuit with a high regulation large capacity power transformer and a large block capacitor of 80,000μF (10,000μF x 8) in a LR independent manner have been combined to achieve both instantaneous power andstability. A high level of regulation is achieved by increasing the diameter of the primary winding of the power transformer.
High level of damping factor
To transmit the powerful drive force that is generated by the large scale output circuit without loss, a large low resistance speaker relay in which 2 contacts are connected in parallel has been incorporated into the design. Lowering impedance right to the extent of the speaker terminals improves the damping factor significantly from 240 (the value of the L-590AX) to 320 resulting in vibrant sound reproduction.
Low impedance transmission
The combination of LUXMAN original OFC wire used in the internal wiring and the round pattern incorporated in board wiring which enables smooth signal transmission allows for Beeline construction in which audio signals are configured with the optimal and shortest route, further contributing to lower impedance transmission.
Specifications
| Rated output | 30W + 30W (8Ω), 60W + 60W (4Ω) |
|---|---|
| Input sensitivity/input impedance | PHONO (MM): 2.5mV/47kΩ PHONO (MC): 0.3mV/100Ω LINE: 180mV/47kΩ BAL.LINE: 180mV/55kΩ MAIN-IN: 550mV/47kΩ |
| Output voltage | RECOUT: 180mV, PRE OUT: 1V |
| Frequency response | PHONO: 20Hz to 20kHz (±0.5dB) LINE: 20Hz to 100kHz (+0, ±3.0dB) |
| Total harmonic distortion | 0.005% or less (8Ω, 1kHz) 0.02% or less (8Ω, 20Hz to 20kHz) |
| S/N ratio (IHF-A) | PHONO (MM): 91dB or more,PHONO (MC): 75dB or more LINE: 107dB or more |
| Volume adjustment | New LECUA1000 |
| Amplification circuit | ODNF 4.0 |
| Output configuration | Bipolar 3-parallel push-pull |
|---|---|
| Damping factor | 320 |
| Max. amount of tone control | BASS: ±8dB at 100Hz TREBLE: ±8dB at 10kHz |
| Power supply | 230V~(50Hz) / 115V~(60Hz) |
| Power consumption | 330W 260W (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 | 28.4kg (main unit) |
| Accessories | Remote controller (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. |
* Reprint from Manufacturer's website
