Luxman Audio L-507uX Integrated Amplifier

MSRP: $7,000

This will be an excellent choice for someone wanting to reduce the complexity of their system while not compromising sound quality. [The Luxman L-507u] is also an excellent choice when building a new system, offering enough flexibility and power to anchor any level and assortment of surrounding components. Joe De Champ – Stereo Mojo

Product Description

Luxman Audio L-507uX Specifications

Continuous effective output 110W + 110W/8Ω
200W + 200W/4Ω
Input 4 line systems
Phono 1 system (MM/MC switchable)
2 balanced line inputs
Sound recording input/output 2 line systems
Pre-output and main input 1 system, each
Speaker output A, B 2 systems
Amplifier version ODNF 3.0
Output constitution Bipolar parallel PP
Harmonic Distortion or less  ( 8Ω at 1KHz)
or less(8Ω and 20Hz~20KHz)

Input sensitivity/impedance
PHONO (MM) : 2.5mV/47KΩ
PHONO (MC) : 0.3mV/100Ω
LINE : 180mV/42KΩ
BAL. LINE : 180mV/79KΩ
Output voltage TAPE: 180mV and PRE-OUT: 1V
Signal-to-Noise Ratio 
PHONO (MM) : Above
PHONO (MC) : Above
LINE : Above
Frequency characteristic
PHONO : 20Hz~20,000Hz (±0.5dB)
LINE : 20Hz~100KHz (+0dB ~ -3dB)
Front panel
Volume and input selector, meter, power switch, monitor switch, [phono] MC switch, REC out switch,  speaker selector, stereo / mono mode selector, bass (±10dB @ 100Hz) & treble (±10dB @ 10kHz) tone controls, subsonic filter (9 Hz) and balance control, line straight switch (tone controls bypass), separate switch (splits the internal preamp from the amplifier) meter light and headphone jack, power on indicator and protection indicator
Rear panel
Balanced phase inverter, signal ground and line phase sensor, AC inlet.
Remote Control
Electric power consumption 1.2W (stand-by),  82W (idle),   260W  (rated output)
Dimensions W x H x D 18.3” (467mm) 7” (179) 17.25” (437)
Weight 50 lbs.    (22.5kg) nett.  62 lbs shipping


Analog Audio's Review Of The Luxman L-507X Integrated Amplifier

The Luxman L-507x is a fully featured integrated amplifier conceived and created like a sophisticated separate to deliver highly accurate sound reproduction. Internally, the Luxman L-507x is divided into blocks to reject radio-frequency noise; thereby improving the audible signal-to-noise ratio. While the power amp, power supply in/output and display blocks are shielded extensively  and circuits are carefully isolated from each other to drastically cut interference due to magnetic flux. This design also helps make the chassis more rigid, coupled with ideal weight distribution to cut noise and vibration.

Luxman’s patented ODNF circuitry has redefined the relationship between music signals and noise. ODNF does not use phase compensation or NFB loops in the music signal path, instead it accurately isolates distortion components to cancel them. Conventional negative feedback systems can have an adverse effect on the music, introducing phase distortion. Instead, Luxman utilizes a distortion reduction circuit called “Only Distortion Negative Feedback” (ODNF). This system works by isolating noise & distortion at the output from the music signal and sparingly applying negative feedback to suppress them.  The circuit features such an ultra-wide range, ultra- high slew rate and ultra low distortion that it does not use phase compensation for the music signal amplifying circuits. This new technology also ensures that need for a DC servo circuit circuit is alleviated, again improving sound quality.

The Luxman L-507x  features a new high quality electronic selector switch, which is the heart of the C-1000f pre-amp (one of Luxman’s 80th anniversary commemoration models). The sound quality deterioration using the new electronic input switch is now minimal, while channel separation and crosstalk efficiency were raised substantially in comparison with the previous L-505f/L-507f/L-509f SE.

Extensive listening was applied to the high purity, oxygen free copper (OFC) cables which are used to transmit the signal throughout the amplifier. These cables have a minimal audible signature and minimal electrical effect on the audio waveform. Linear wide bandwidth frequency response is achieved by the low measured values of both inductance and capacitance. The result, the cables do not color the sound, but pass it through, quickly.

Enjoy the ability to play or record your LP collection with the built-in phono stage in the Luxman L-507x which accommodates both Moving Magnet and Moving Coil cartridges.  A subsonic filter is also easily accessible on the front panel in order to remove unwanted low frequency noise while you are listening to a record. A mono switch is also available for both loudspeaker setup as well as mono record playback.

The headphone output use the same circuitry as the speaker outputs; late night listening is so rewarding, treat yourself to the best headphones that you can afford – you will not be disappointed.

The tone controls might seem like an anachronism in this day and age of minimalism, but they can be remarkably effective in bring to life a less than perfect music collection. We all have music gems in our collection that are sonically challenging. A lot of the 1980′s CDs are quite harsh sounding and the digital glare can be quite fatiguing. Reduce the treble slightly and while the harsh CD is not going to suddenly sound like a reference recording, at least it will now be perfectly listenable. With the Luxman L-507x, sit back, relax, enjoy the music & forgot about the HiFi. When you want to bypass the tone controls, just engage the Line Straight switch.

Here is a clever device found on the back of every Luxman powered product. You press the button and it will check the phase of the electricity it is receiving. If the AC outlet in the wall is incorrectly wired, meaning the live and neutral are swapped, a red LED will turn on to warn you. You only need to press it once, when you are installing a product to check that everything is in order. Its a simple mistake, that occurs often, and one that can seriously undermine your listening enjoyment.