The L-505f was introduced in 2001 and was remarkably successful as many proud Luxman owners will happily testify. Its successor, the L-505u, now has Luxman's unique noise & distortion canceling technology - ODNF version 2.2 as well as the electronic input selector (trickle-down technology from the flagship C-1000f) , which has lowered channel crosstalk & increased channel separation..

The L-505u is a fully featured integrated amplifier, with a wonderful phono stage, multiple inputs (including one balanced), tone controls (easily defeated at the touch of a button), enough power to drive most speakers in just about any room in your home and a remote control to add convenience to a remarkably comprehensive integrated amplifier.  It is a wonderful entrance to the world of Luxman.

Chassis bases have superb vibration absorption in order to supress noise levels. The power transformer, electrolytic capacitors and amplifer output stage (see amp block below) are laid out so as not to interefere with each other. To reduce intereference further, the block construction isolates each section using shielding panels, and extensive internal filtering to reject magnetic flux interference. 

 Input Selector 

Both the L-505u and L-509u, feature the 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-509f SE. In addition the illuminated position indicator around the input selector knob, makes it much easier to view the selected position even from afar.

Volume Control 

The integrated amplifiers also benefit from the C1000f in that they use a variation of the LECUA 1000 volume control. At any single volume setting only a few resistors are in circuit per channel. The less devices in the signal path, the purer the sound, the cleaner the music.

Amplifier 

The amplifier section has not been ignored either; noise and distortion has been kept to a minimum with the introduction of ODNF version 2.2. The deep, rich tone is well able to reveal subtle detail buried deep in the music, due to the removal of noise  and distortion.

Pure Copper Cabling 

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.

Phono & Headphone Amplifiers  

Enjoy the ability to play or record your LP collection with the built-in phono stage which accommodates both Moving Magnet and Moving Coil cartridges. There is also a high quality headphone amplifier, accessible from the front panel. 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.

Two Pairs of Speaker Terminals 

Large speaker terminals for driving two individual sets of speakers. At the turn of the speaker switch, it is possible to change between the two pairs of speakers easily. In addition, if the A+B function is used; Takasina capacitors are used to parallel the output which permits bi-wiring a single pair of speakers.

Power Meters 

The large-sized power meters, calibrated in decibels are easy to read even from a distance. The logarithmic compression system is easy to grasp and also how this applies to the music. The meters are calibrated from -60dB below full rated power to +3dB above rated power. An 8mm thick acrylic covers the meters, which are normally backlit, though the illumination may be turned off from the remote control.

Remote Control 

Easy to use, intelligently laid-out, aluminum remote control; all of the primary functions of the L-505u, including power on / off can be controlled from the comfort of your listening chair. Besides the electronic volume control, there is also a mute feature. The display meters’ back light can also be turned on / off from the remote control. see below

Tone Controls 

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 sonicly 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. Sit back relax, enjoy the music & forgot about the HiFi. When you want to bypass the tone controls, just engage the Line Straight switch. 

NOTE:          You might also use the Tone Controls for room acoustics’ correction. They are in effect simplified room equalization controls.