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L-505uXII
The attraction of the L-505uXII is its new level of refinement, approaching perfection as an authentically desirable product
The L-505uXII is the eagerly awaited Mark II version of the popular L-505uX that has been at the forefront of pre-amplifier design since it's launch in 2011. Incorporating an abundance of proprietary technologies, such as Luxman's Version 4.0 ODNF (Only Distortion Negative Feedback), as well as LECUA (Luxman Electronically Controlled Ultimate Attenuator), this product is a truly multifunctional integrated amplifier. As Luxman's latest high-end model, the L-505uXII continues the evolution of the L-505 series, which has attracted many fans of audio quality and earned a great reputation. As an amplifier which exudes sophistication and authenticity beyond its class, the L-505uXII represents the latest in a long line of exemplary models.
ODNF* Version 4.0 - Innovative amplification feedback circuit
An integral part of the design of the L-505uXII 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 from the amplifier's output circuit. The L-505uXII is equipped with the latest Version 4.0 ODNF circuit, resulting in a dramatically enhanced accuracy in distortion detection due to the paralleled first stage and Darlington equipped second stage amplification circuit, as well as a paralleled first stage error detection circuit. With it's lower impedance and higher S/N ratio, the L-505uXII realizes accurate reproduction of even the gentlest audio signals and achieves a full range of dynamic musical expression. The output stage, with it's parallel push-pull structure, has secured sufficient power at 100W+100W(8Ω) and 150W+150W(4Ω).
Highly accurate LECUA computerized attenuator
LECUA (Luxman Electronically Controlled Ultimate Attenuator) is at the heart of the pre-amplifier section and the sound volume adjustment function of the L-505uXII. The L-505uXII design also uses a solid state(IC) type circuit to achieve a significant reduction in size. LECUA provides an ideal level control mechanism that allows smooth and fine volume adjustment over 88 steps, thereby minimizing any deterioration of the audio signal. In addition, left and right balance adjustment is integrated into the attenuator's control functions. The multifunctional ability of LECUA ensures accuracy over the full range of the volume control, whilst suppressing any deterioration of sound quality. The volume may also be adjusted with the remote control, but when adjusting the volume manually, the tactile design and gradual motion of the control itself enables intuitive adjustment of the attenuation level.
Discrete buffer circuit
The L-505uXII features a new discrete buffer circuit in the output stage of the pre-amplifier circuit that is equivalent to the type used in our high-end C-900u separate amplifier. The pre-amp output stage is able to drive the signal with enhanced current supply capacity. The clarity of the audio signal is protected, whilst at the same time, the driving force fed through to the power amplifier stage is significantly increased. The power and reproduction capability of the L-505uXII achieves overwhelming scale sensitivity and a sharpness on start-up that cannot be achieved by conventional pre-amplifiers.
Specifications
Rated Output:
100W + 100W (8Ω)
150W + 150W (4Ω)
Input Sensitivity / Input Impedance:
Phono (MM): 2.5mV / 47kΩ
Phono (MC): 0.3mV / 100Ω
Line: 180mV / 47kΩ
Balanced Line: 180mV / 55kΩ
Main In: 1V / 47kΩ
Output Voltage:
Rec Out: 180mV
Pre Out: 1V
Frequency Response:
Phono: 20Hz to 20kHz (within -3dB)
Line: 20Hz to 100kHz (within -3dB)
Total Harmonic Distortion:
0.009% or less (8Ω, 1kHz)
0.09% or less (8Ω, 20Hz to 20kHz)
S/N Ratio (IHF-A):
Phono (MM): 91dB or more
Phono (MC): 75dB or more
Line: 104dB or more
Volume Adjustment:
LECUA
Amplification Feedback Circuit:
ODNF 4.0
Output Configuration:
Bipolar parellel push-pull
Damping Factor:
210
Max amount of tone control:
Bass +/- 8dB at 100Hz
Treble +/- 8dB at 10kHz
Power Supply:
230V ~ (50Hz) / 115V ~ (60Hz)
Power Consumption:
270W
85W (under no signal). 0.4W (at standby)
External Dimensions:
440(W) x 178(H) x 454(D) mm
front side know of 20mm and rear side terminal of
27mm included in depth
Net Weight:
22.5kg (main unit)
Accessories:
Remote control (RA-17A)
Power cable
Speaker Terminal
(Supported Y-Lug terminal dimension):
Width of part a: 15mm or less
Width of part b: 8mm or less
* Connection may not be performed
depending on the shape of the
Y-lug terminal.