Robert Koda

While it is true that Robert worked under the guise of the legendary Hiroyasu Kondo of Audio Note (Kondo) Japan in Tokyo, Robert is actually self-trained and an independently motivated creator of audio electronics.
Interest and research into the interaction between technique and musical satisfaction began at the very early age of 12. While within the era of the transistor, ironically it was vacuum tube that first captured Robert’s attention.
Robert Koda now offers a select few the opportunity to own and enjoy these hand crafted works of musical beauty.

“The desire now to offer fellow music listeners the same complete listening experience finally persuaded me to produce commercially available options – the Robert Koda brand.”

Portfolio

Robert Koda K-10

The Takumi K-10 is our classic and multiple award winning line pre-amplifier.
Full balanced and unbalanced outputs of exceptional quality, mechanically switched inputs and a full mechanical attenuator built in the Robert Koda tradition are but a few of the design points.

The K-10 is the first pre-amplifier to include our ITC circuit and has won the hearts of many demanding music listeners for its shear ability to elevate the sound of the complete audio system into deep space territory.

The ITC circuit

Our invention and a unique arrangement of semi-conductors is central to achieving sonic perfection. Inverted Transconductance Coupling importantly provides a total freedom from “the sound of power supply”. Distortion is pushed below measurable limits yet the circuit is of an elegant simplicity that stands firm under dynamic conditions music signals present.

Excellent coupling between source components and power amplifier, with a consummately low output impedance and intense drive capability ensure the K-10 will bring out the best of the power amplifier.

Technical Specifications

Output
SE x 2 pairs True balanced x 1 pair
Input
SE x 3 pairs True balanced x 1 pair
Gain
Plus 6 dB
Output impedance
75 ohm single ended, 2 x 37 ohm balanced
Input impedance
50K ohm single ended
Signal to noise
110 dB A weighted at 1V
Frequency response
20 Hz to 20K Hz +/- 0.03dB
Distortion
0.00003 % @ 1Khz at 2.5V into 100K ohm.
Power consumption
Off – 0W, On – 30W
Weight
27 Kg unpacked
Size
380mm wide, 380mm deep and 170 high

Robert Koda K-15 EX

The Takumi K-15 pre-amplifier is our flagship pre-amplifier and builds upon the technologies found in the acclaimed, award winning K-10. All together more sophisticated, refined and engaging, the Takumi K-15 is surely pre-amplifications ultimate form!

The Robert Koda K-15 preamplifier redefines State of the Art and presents music as a fresh encounter of a most indulgent and satisfying kind.

Specifically designed to partner with a wide range of source components and power amplifiers, its purpose is to extract the maximum performance from each component so that the system as a whole delivers uncharted musical pleasure.

 

The ITC circuit

Our innovative and a unique arrangement of semi-conductors, called ITC was Pioneered in the multiple award winning K-10. Now ITC is taken to the next level with the K-15 which is dramatically improved and refined in both design and execution to achieve incomparable subjective and measured results.

The ITC circuit provides an excellent interface between source component and power amplifier. It delivers massive power gain with remarkably low distortion while remaining highly immune from the negative influences of power supply noise.

Technical Specifications

Output
SE x 2 pairs True balanced x 2 pair
Input
SE x 5 pairs True balanced x 5 pair
Gain
Plus 8 dB
Output impedance
60 ohm single ended, 2 x 30 ohm balanced
Input impedance
50K ohm single ended, 2 x 50K ohm balanced
Signal to noise
114 dB A weighted at 1V
Frequency response
20 Hz to 20K Hz +/- 0.03dB
Distortion
0.00003 % @ 1Khz at 2.5V into 100K ohm.
Power consumption
Off – 0W, On – 30W
Weight
29 Kg unpacked
Size
369mm wide, 385mm deep and 158 high ex.ft.

Robert Koda K-70

The Robert Kŏda brand is pleased to present the Takumi K-70 amplification system – our vision of amplification’s ultimate form.

 

The concept of Dynamic Simplicity is core to our philosophy. Dynamic simplicity, can only be achieved by the use of single ended Class A, current mode circuits, woven together in our unique way where elements mutually couple to form a strength far greater than their sum. Unavoidably expensive to execute and time consuming to create, this is the path of the K-70.

 

Contained in a triple chassis format, the Takumi K-70 is our flagship model and our vision of the ultimate amplifier. Incorporating vacuum tubes and transistors, this unit shares no similarity sonically or electrically to either technology. Instead, the K-70 reaches into the ether and delivers a sweeping sound of universal beauty and unbounded complexity.

At total weight of some 80 Kg’s the K-70 is surely one of the planet’s most substantial seventy watt amplifiers and across all spectrum of music, transducers and personal favor a sound of completeness, delicate yet dynamic, distant but close defines the K-70’s remarkable grandeur.

Technical Specifications

 

DNA
Single Ended Class A1 hybrid power amplifier with separate power supply.
Output power
Greater than 70W. Power delivery maximised for 3 to 7 ohm loads
Gain
25.5dB SE in or balanced in, voltage mode. 10V/mA in current mode.
Input impedance
30K Ohms, Voltage mode, 50 ohms current mode.
Output impedance
Less than 0.07 ohms 20 Hz to 20Khz.
Signal to noise
Greater than 115dB A weighted at nominal output.
Greater then 97dB A weighted at 1W/8 ohms
Power response
Less than 5Hz to greater than 200KHz.
Power consumption
0.00003 % @ 1Khz at 2.5V into 100K ohm.
Power consumption
1000 Watts at any volume into any load.
Weight
Power supply: 40Kg – Mono amps: 20Kg each
Size
380mm wide, 256mm high, 550mm deep (each of 3 units)
Takumi K-10
Mono And Stereo 2013 (Uber Amp Award):   – Read the Review
Tone Audio 2012 Product Of The Year: – Read the Review
Tone Audio December 2012: – Read the Review
The Audio Beat 2012: – Read the Review
Audiotechnique 2012 (China / English Translation): – Read the Review
Takumi K-15
Takumi K-70 Plus K-15 High Fidelity.pl 2015 (Best Product 2015): – Read the Review
Hi Fidelity.pl 2014:   – Read the Review
Takumi K-70
Takumi K-70 Plus K-15 High Fidelity.pl 2015 (Best Product 2015): – Read the Review
Audiotechnique 2012 (China / English Translation): – Read the Review
Hi Fi Critic (UK) 2011:   – Read the Review
Hi Fi News (UK) 2011 (Editors Choice):   – Read the Review
TESTIMONIAL: Takumi K70 Generation 2 is like flamboyant fireworks sparkling with total freedom to deliver a colorful message…  – Read the Review

Philosophy

Our brand exists because we have something uniquely special and timeless to offer serious music lovers. Our values are one of truth in the spirit of music as in business. Our customers are the commissioners of each amplifier and are therefore of great importance to us.

More than 16 years experience in the field of high end audio distribution, retail, installation, servicing and all the contact available through this career with vast arrays of equipment of those times fueled a hounding sense that things could be done by him and be done right played a major role in his life and lead to the development of a system that by 2004 captured the results of this life long work.

Its architecture was both simple yet elegant and redefined the inherent structure of digital / analogue playback technique. To visiting audiophiles it yielded a propinquity to completeness not experienced before on replayed music. The system was deemed startling in its unique ability to transcend the sound of both transistor and vacuum tube – The amplifying devise.

Drawn from those works, refined, perfected and matured Robert Koda now offers a select few the opportunity to own and enjoy these hand crafted works of musical beauty.