no longer for sale.

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vintage9594

no longer for sale.
« on: 9 Mar 2015, 03:12 am »
I have a Nice condition John Kenny Ciunas USB dac available.  I am asking $550.00 for it shipped and PayPal included in price. 

It has a internal battery that is charged by a separate Cable to USB port and also a seperate charger that can be plugged in as well....battery should last approx 8 hours on a charge.
Both of those cables will be included and if you need a USB cable just ask as I can include a standard issue USB cable.

There are a lot of reviews out their on this very nice sounding Dac so please research and if you have any questions please ask.  I am only selling as I am looking to raise funds for a Dac that will also have preamp capabilities.

U.S. Sale only

Thanks

The
Ciúnas DAC accepts USB input & outputs line level RCA stereo
output. It essentially incorporates the USB technology of the Ciúnas USB
converter & feeds the superior I2S signal to a PCM5102 BB/TI DAC
chip. The PCM5102 DAC sounds superior to the ESS Sabre DAC ES9023 I used in one of my previous DAC products.

Each element significant to achieving the best possible signal quality has been addressed.
 
 The battery is the lowest possible PS noise
device  - one of the most important factors in digital audio. The high
current output battery used (120 Amps for 7 secs) is the most stable
power supply available for digital circuitry. Using this isolated power
supply avoids issues of common mode noise & ground loop noise, often
associated with non-isolated power supplies.  Whereas other
USB devices use 'add ons' such as isolators, special power supplies
(often battery PS), ground lift techniques, etc., there is no need or
advantage to such devices with the Ciúnas range - these issues are
already dealt with & designed in from the ground up. The
self-powered Ciúnas mitigates the influence of the PC's noisy power
supply.  As the 5V USB feed is not used or connected in any of the
Ciúnas devices there is no influence from this supply; this means
special USB cables, which separate out the 5V Vbus, wire are not needed
- a wider range of options are available when choosing a USB cable
which are is not limited by this consideration.

Two high quality audio clocks are used to time the audio signals. These clocks are used
directly at the  DAC chip's input to re-synch the signal timing in order
to achieve the lowest jitter feasible. No capacitors in the signal path
from the output of the DAC chip give a clear, undistorted, uncoloured
sound. Not only will the standard 16/44 sample rates sound better than
your CD player but high definition audio will sound stunningly
realistic. The DAC doesn't just favour high quality recording, MP3
listening is also greatly enhanced by this clearer rendition of the
soundfield.

The Ciúnas DAC will operate with native
UAC2 USB drivers found in MAC OS 10.6+, Linux/Unix, IOS(iPad). It will
also operate with PC using a downloadable driver & with Squeezebox
Touch (when using the EDO plugin).

The battery is charged via an internal
charger  powered from an external 5V supply. A USB charger cable is
supplied which allows charging from a spare USB port or alternatively an
external 5V PS can be used. The quality of this PS is immaterial as the
device uses a battery shunt configuration & is continuously trickle
charged. The battery has a lifetime of 20 years when operated in this
manner.






Thanks
« Last Edit: 12 Mar 2015, 07:16 pm by vintage9594 »

vintage9594

Re: John Kenny Ciunas Dac
« Reply #1 on: 11 Mar 2015, 06:54 pm »
Bump.....Guys and Gals I know this isn't a well known Builder/Brand but I can promise you this is a lot of sound for money.  I replaced an Eastern Electric Dac with Opamp upgrades, power supply and volume pot mods as well and didn't look back.  It has a nice even presentation from top to bottom...detail retrieval is excellent, bass is controlled and the upper range is detailed without being overly bright. 

Thanks for the look.



http://www.avrev.com/home-theater-preamplifiers/stereo-preamps/john-kenny-ciunas-usb-dac-review.html