Reference CD-2.2 Linear Tube CD Player
" A completely no compromise design"
Click for new Stereo Times Review
R2.2CD linear 16 bit
44.1kHz Tube CD-player
FEATURES:
Non-Oversampling, No digital
filter
J-FET/ Transisters made of analog filter without any op-amp
6H30 Tube output stage
Sampling frequency: 44.1kH/88.2kH (selected manually using remote
control unit)
Output voltage: 2.35V
Digital output: 1 group, Unbalanced
16bit/44.1kHz Format
Non-Oversampling, Digital-filterless DAC
Non-Oversampling DAC concept was first proposed by Ryohei Kusunoki in late 1966. In recent interview, he states that "the issue is not either it is Non-Oversampling or Higher-rate-sampling, but the use of the digital filter can cause smearing in the time domain."We can confirm this smearing effect on the sound caused by the use of digital filter rather easily through listening experiments. This leads us to believe that the current problem with CD is not the limitation of 16bit/44.1kHz format, but the use of the digital filter which is preventing us to experience the true possibilities and the limitations of 16bit/44.1kHz format. The sound of Progression is enough to prove this matter.
Non-oversampling, Digital-filter-less DAC Concept
by Ryohei Kusunoki
originated by Yoshi Segoshi http://www.sakurasystems.com/articles.html
Passive I/V conversion
In Progression
I/V conversion is handled by a passive device instead of an active
one. The result is a superb transient response without any over-shooting,
and still maintains the output voltage of 2.35V
SPECIFICATION:
DAC resolution : 16bit
TDA1543
0dBFS signal output : 2.35V RMS
Output Terminals : Gold plated Tube RCA unbalanced
Frequency response : Less than +/- 0.5 dB deviation 20Hz-20kHz
Phase response : Less than 5 degrees deviation 20Hz-20kHz
Signal-to-noise ratio : More than 100dB
Crosstalk : Less than -100dB
Distortion (RCA) : Less than 0.12 %
Remote Control : Philips RC-5 compatible IR system 36kHz modulation
frequency
Vacuum tube : Sovtek 6H30 x1
Dimensions / Weight : 21cm x 43cm x 33cm (HxWxD) / 16kg(wood top
panel)
Dimensions / Weight : 21cm x 43cm x 33cm (HxWxD) / 18kg(Metal
top panel)
This astonishing player is getting well deserved rave review around the world. It is what CD should have been years ago. Over sampling designs give many sonic benefits, but they create a large amount of digital noise, which is then removed by passing the signal through a digital filter which removes the noise, but has a deleterious effect on the music as well. This latest generation of non over sampling 16 bit decoding has a wonderful naturalness and analogue like musicality which has been missing for too long. This musicality is then retained by the spectacularly musical Consonance tube output state which makes this a player which should be auditioned if you are considering a CD player at any price.
