Robert Koda Takumi K-10 high-end preamplifier official release

Robert Koda new state of the art ultimate high-end audio preamplifier Takumi K-10

Robert Koch of Robert Kŏda audio just released new flagship state of the art preamplifier. Following in the steps of highly appreciated and ultimate statement in power amplification with Takumi K-70, Robert Kŏda just publicly announced the availability of Takumi K-10. There are already few very happy owners and you can check that they really praised it highly at Audio Exotic audio forum.

Robert Koch is the man, that directly  worked on the legendary Kondo M-1000 ultimate super preamplifier and later on with his own venture Robert Kŏda created a monument product Takumi K-70 power amplifier, that shook high-end audio circles.

Stay tuned for exclusive interview with Robert at Mono & Stereo in few days about why he designed Takumi K-10, how did he approach the ultimate to preamplification and how his knowledge and experience were used in designing what he called his best creation so far. 

Meet the Robert Kŏda Takumi K-10 preamplifier

Accepting the challenge to create the ultimate preamplifier would lead Robert Kŏda on an
ambitious programme of new concept invention - and finally the release of the Takumi K-10
line stage pre-amplifier.

The 27kg copper encased machine reaches a kind of sound quality few had expected
to ever find. By unique arrangement of semi-conductors the pre-amplifier provides a
total freedom from “power supply sound”, superb measured performance and an elegant
simplicity that stands firm under the dynamic conditions music signals present.
Superlative component selection and matching, hand construction of the highest caliber are
but a few of the trademarks of this machine of single purpose - Musical excellence.

Robert Kŏda LLC Japan
Here a few highlights from K-10

Innovative design meets meticulous execution

The K-10 pre-amplifier   is crafted wi th met iculous attent ion  to one purpose,  
musical excellence. Each element is carefully engineered to deliver the highest
possible performance without compromise to concerns of cost or practicality.
Form truly does follow function.

Unnecessary complication is avoided at every turn to protect the precious music
signal from adverse influences.

Simple, finely crafted mechanical controls

The K-10 uses the finest attenuator part available for volume control. Perfectly
hand assembled in Japan, this attenuator uses exotic resistors solely created for
sound reproduction. Comprising of a special carbon formulation with thick gold
over oxygen free copper leads, these parts are of ultimate choice.
Source selection is performed by a rotary switch built specifically for the most
demanding of audio applications. Thus all manner of relays, complex support
circuitry and sound destroying printed circuit board tracks have been eschewed

DC Reactor power supply

To decouple the K-10’ s performance from impure AC supply lines we have adopted a heavy DC Reactor type power supply that delivers valuable advantages over other types of supply. The reactor’ s performance is further enhanced by the use ofour own designed for audio, discrete zero feedback regulator to provide the amplifier with pristine DC current.

Triple screened chassis

A robust chassis creates a full copper envelope surrounding all components of the K-10 to shield them from the influences of external electromagnetic and radio frequency interference.  Sensitive components within the ITC gain stage are further shielded by “double encapsulation” – a separate copper shell and a custom made mu-metal capsule within.  The power supply  is housed  in  i ts own  “magnet ic vaul t ”  made of  2mm  thick soft   iron plate.  A sandwich  f loo r  const ruct ion with constrained layer damping and hemispherical sorbothane feet provide additional isolation from unwanted vibrations.

Electrically, thermally and acoustically this lavish assembly sets an excellent operating environment for the enclosed electronics.

Single ended and balanced output of equal performance

Providing single ended and balanced outputs of identical performance presents a challenge to pre-amplifier designers. The K-10 is successfully engineered to deliver both at full measure, affording a greater flexibility for system configuration.


Inputs       SE X3 pairs True balanced X1 pair
Outputs    SE X 2 pairs True balanced X 1 pair
Gain     Plus 6dB
Output impedance  75 ohm single ended, 2X 37 ohm balanced
Input impedance  50K ohm single ended
Signal to noise   110dB A weighted at 1V
Frequency response  20Hz to 20KHz +/- 0.03dB
Distortion   0.00003 % @ 1Khz at 2.5V into 100K ohm Estimated due to measurement limits.
Power consumption    Off – 0W  On – 30W
Weight   27Kg unpacked
Size   380mm wide, 380mm deep and 170 high

Mono & Stereo, July 2011
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