Luxman L-509X Stereo Integrated Amplifier (Trade-In)

Description

The L-509X integrates the features of both a high quality separate amplifier and a high performance integrated amplifier into one product. The goal of creating an ideal integrated amplifier, initiated by LUXMAN with the launch of the L-509fSE in 2002, has now been advanced with the development of the L-509X. The L-509X integrated amplifier is equipped with many desirable features, such as the New LECUA1000 and a discretely configured buffer circuit in the output stage of the pre-amplifier circuit. LUXMAN’s ODNF (Only Distortion Negative Feedback) original amplifier feedback circuit and a power supply with independent left and right channel blocking capacitors are intrinsic to this design, as well as many components used only in high end models, ensuring high-quality audio reproduction.

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.

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.

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.

SPECIFICATIONS

Rated output: 120W + 120W (8Ω),
220W + 220W (4Ω)
Input sensitivity/input impedance: PHONO (MM): 2.5mV/47kΩ
PHONO (MC): 0.3mV/100Ω
LINE: 180mV/47kΩ
BAL.LINE: 180mV/55kΩ
MAIN-IN: 1.1V/47kΩ
Output voltage: REC OUT: 180mV, 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)
0.06% 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 circuit: ODNF 4.0
Output configuration: Bipolar 4-parallel push-pull
Damping factor: 370
Max. amount of tone control: BASS: ±8dB at 100Hz
TREBLE: ±8dB at 10kHz
Power supply: 230V~(50Hz) /115V~(60Hz)
Power consumption: 380W
150W (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: 29.3kg (main unit)
Accessories: Remote control (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.