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Special edition appeared only one time in ones lifetime
Luxman L-509f SE reaching a new peak
Gourdes Buch, Furtwanglers Beethoven and Klasss Verdi. The
former music giants have all contributed famous epoch-making
works. Although they have occupied the dominant positions in
their respective kingdoms, they are not contented with the existing
positions and challenged for much higher places. The famous
performance which could be called the special edition appeared
only one time in the lifetime was born like this way.
Aiming at the much higher peak in the far distance, the Luxman
standing on the top of integrated amplifier sector with its L-509f,
is charging for the new peak---the development of new L-509f
SE. This is nothing but a confidence on the realization of the
unexpressed possibility. The L-509f SE is a progressive product
of flagship model L-509f aiming at separate amplifier, or more
exactly, pursuing "one-body·separate" quality. Especially, while
improving the driving power of pre-section under the concept
of power amplifier drive, the overall circuit was re-studied,
the selection of each part, sound quality, as well as the grade
of artistic design are thoroughly examined again, at last the
incomparable accomplishment was obtained. Then comes out the
real high-end integrated amplifier with a brand-new plaster while
finish suitable for the status of the special edition. And a new peak
of Luxman was created too.
The ODNF (Only Distortion Negative Feedback) circuit that deletes the phase perfection circuit and NFB from the transferring path of music signal and just separates and cancels the distorted elements is an epoch-making audio technology constituting the core of Luxmans [f] series. The ODNF Version 2 called as the second generation of ODNF circuit was adopted in power amplifier block of L-509f SE. The initial slewing rate feature full of instant explosive force which is for livelily reproducing the abundant lingering charm of Steinway, and the nuance of the dignified and multicolored sounds of Stradivarius was more mature. The aim lies in restudying the overall circuits thoroughly on the basis of the evolution of this circuit technology.
F o r p u r s u i n g t h e d r i v a b i l i t y v i v i d l y reproducing the life feeling of music, L-509f SE has won the excellent driving power when meeting with lower impedance. By adopting 3 p a r a l l e l p u s h - p u l l p o w e r t r a n s i s t o r s , t h e b o u n d l e s s d r i v i n g p o w e r a s h i g h a s 160W+160W(8Ω) and 240W+240W(4Ω) is achieved. Furthermore, the high grade music reproduction which could give varieties of speakers full plays of their individualities becomes available. The ODNF power block with glass board adopted
ODNF circuit concept diagram INPUT OUTPUT
Main amplifier
Sub-amplifier
Distortionelements forcanceling
* Main amplifier: Non-NFB amplifier* Sub-amplifier: Only the differential elements of input and output and output waveform are amplified
(Only differentialsignal was amplifier)
The version of ODNF with a high opinion was upgraded and
the brand-new sound quality tuning was put into practice.
Pursuing the power scale directly connecting with leaping
feeling, achieving 240W+240W(4Ω)
Pre-amplify part was generously built in with ODNF types
power amplifier drive functions
Luxams control amplifier dose not only own the high grade input select and the volume control functions, but could also play an important role as power amplifier drive. Namely, the power amplifier could prepare the signal conditions for ideally driving. In the pre-amplifier part of L-509f SE, the power amplifier drive competing with the separate amplifier by its ODNF type circuit construction was discretely built in. From the delicate leaping feeling of music and the strength of sound full of life force, one could experience a new music reproduction world surpassing the original pre-main field.
The perfecting ultimate volume was
adopted in main volume
The problems which are pointed out about the distortion caused by the leaking current at contacts and the contact material are found in the ordinary volume control. The ultimate v o l u m e w i t h a s u p e r- l o w e r d i s t o r t i o n r a t e and a high rigidity construction, and enjoying an excellent opinion and built in the control amplifier C-9IICustom/C-8f was adopted in L-509f SE. By collecting the high functions such as a synchronization error of ±0.5dB (0-95dB) in L/R two channels and a maximum decrement of <-“120dB, the perfecting volume control was realized without any spoiling of music source information.
The selector of direct drive without any damage to music
information volume
By the adoption of the high grade relay specially used for audio in varieties of function selectors of L509f SE, the operation via direct driving could be realized
via no any other extra mechanism. The contact resistance of relay contact was kept down to the limit via the special processing technology of contact surface. The function switching could be carried out without any damage to the informational volume of music.
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Separating pre-power just by one touch, matching to the
varieties of system-ups.
Viewing from the system development in the future, pre-main separate type design will be adopted. It could not only separate the functions of pre-section and main-section respectively and make a flexible use of them, but could also upgrade them to the level of separate system by integrating other power amplifier and control amplifier. And by adding power amplifier, it is able to expand to the modes of biamplifier and multi-amplifier. The L-509f SE could easily finish the separation of pre-circuit between main-circuit just by the turning of switch on the front panel.
The capacity of power transistor was increased much than L-509f, the high regulation type of 700VA was adopted. It could match to the instantaneous power supply for fitting the expressions of music changing at every minute.
The delicate artistic design of plaster white directly transfers
the feeling of the reproduction of high purity music
The developer s enthusiasm pouring in the special edition was reflected in the delicate design of L-509f SE. The appearance design has renewed the [f] series o f o r i g i n a l i n t e g r a t e d a m p l i fi e r , and specially a d o p t e d t h e plaster white finish full of h i g h - g r a d e feeling. From
the beautiful and silvery appearance reminding the reproduction of high purity music, and from the tactile sensation earning from the high-grade operation feeling, one could actually feel the special existence value
Large-scale block condenser customized after times of trial hearing.
The power transistor with a heat-releasing structure for supporting stable big output.
Speaker terminal was installed with large-scale speaker terminal newly developed for matching t h e b a n a n a p l u g a n d Y l u g terminal with large caliber. It is applicable to the wiring of high-grade cable of high-end machine.
The devotion in every part of the machine will form the real
value of the special edition
On the parts directly exerting impact on the music signal, the high purity 6N grade wire material was adopted. Thus the impedance feature of circuit was upgraded greatly.
In output part, damping factor was greatly upgraded by connecting the large capacity relays in parallel. The music covering broad dynamic ranges could be liberated as it was.In amplification circuit board, the FR-4 glass epoxy resin with minimized capacity content was adopted. So the mutual interference between the basic board of each circuit with high insulativity was successfully reduced to a big extent. The guarantee period of L-509f SE is extended from the normally 2 years to 5 years. As an expression of our self-confidence about the quality of special edition, we warrant a long service life of audio for users.
