Jump to content


  • Content Count

  • Joined

  • Last visited

Community Reputation

502 Excellent

About kukynas

  • Rank
    500+ Post Club

Profile Fields

  • Location
  • Country
    Czech Republic
  • First Name

Recent Profile Visitors

3,033 profile views
  1. as stated in first post these are KDS, they are reasonable choice if you look at the datasheet and phase noise figures, I wouldn't be bothered with crystek these days if you can get NDKs for less with better performance... @mvn it's 6 years old tech with limited functionality in it's native mode, to squeeze maximum out of it you need custom fw + control hw such as additional FPGA
  2. CM6631A chip? nope, very limited performance and functionality for today's market.... @mloutfie basically yes, there were 2 versions, this is the latest...
  3. had retro sci-fi evening with Outland and Timecop, it's funny watching action, tricks and CGI from that time again, I think now it's more than ever clear that even at that time these movies weren't up to Spielberg, Lucas or Cameron level but still very good ๐Ÿ™‚
  4. kukynas

    AKM new Verita AK4499EQ dac

    only available to B2B users and not sure if entire technical list in pdf form like usually available to public after release date
  5. kukynas

    AKM new Verita AK4499EQ dac

    before we see any specs and pinout hard to judge if it's just improved 4497 or something completely new but I think this is AKM's final answer to ES9038PRO https://www.akm.com/akm/en/product/datasheet1/?partno=AK4499EQ&link_id=link5073 edit: after looking at block diagram this is completely different beast, separated dual mono from input to output ๐Ÿ˜ฒ
  6. kukynas

    Iโ€™m back

  7. kukynas

    Sony TV opinions

    excellent, I think this is best price/performance FALD TV on the market
  8. kukynas

    Iโ€™m back

    Good to see you back, whereโ€™s cozmo ๐Ÿ˜€
  9. kukynas

    Gear of the year

    it seems this year it's spread nicely across all major manufactures ๐Ÿ™‚ https://www.dpreview.com/articles/6476469986/dpreview-products-of-the-year-2018?utm_source=self-desktop&utm_medium=marquee&utm_campaign=traffic_source and readers poll over here's closing 17th of December https://www.dpreview.com/tag/2018-readers-poll
  10. kukynas

    Direct Digital amp technology

    did you read those hifi news pages and measurements? yes, measurements suggests that the differences should be in "inaudible" bucket which is from entire topic bit surprise as one would expect bigger differences according to R&D made in last 20 years especially with FL technology I should have stated these are "my" general opinions how I see it after 2 years of my own research and experience with DD amp, sure there are other aspects in each technology and I fully agree that there's no superiority (yet) so any of them could be improve upon, it's just my prediction seeing FL being used by more manufactures and lack of progress in OL design/technology for last 2 decades
  11. maybe one day you'll use exactly the same approach when judging other electronics ๐Ÿ˜‰ anyway I hope the DAC is/will be (at least) at the same level as the predecessor, market with R2R's growing so does competition...
  12. kukynas

    Direct Digital amp technology

    so any take away from above? why is the difference so small even if technology suggest otherwise? and why is open loop in some aspects even slightly better (considering these 2 cases) ? 2 main reasons, none of the white papers considered something's possible and secondly those suggesting superiority of feedback loop didn't considered consequences of compromises what does it mean in practice? nobody considered you can overcome problem of poor PSRR levels by designing PSU capable of -135db directly impacting your signal chain, avoiding change of dynamic range using fixed signal level and implementing variable voltage directly controlling FET output level....on the other hand by fixing poor PSRR with implementation of feedback loop one had to create complex control mechanism with more data processing and algorithm taking care of variables general outcome? both have their pros and cons but it seems feedback loop has brighter future as it becomes more popular among the manufactures of audio gear and is easier to implement as it's pretty much 2 ICs solution if one stays within boundaries of the proposed design... of course it's liiiiitle bit more complex than just 2 ICs wired together (just look inside of those 2 brands mentioned) but I'm pretty sure you know what I meant ๐Ÿ˜‰
  13. kukynas

    Panasonic Lumix LX100 II

    nearly bought the LX100II but than found crazy offer for RX100VA so couldn't resist and decided to take Sony, of course it's nowhere near APS-C or FF in low light but overall for my actual needs better than my phone with excellent video quality and that's what my goal was btw. are you still Al or should I call you betty now ๐Ÿ˜œ
  14. there's plenty of them with variety of quality and type so it might be difficult to choose one with decent quality and reliability especially if 99% of them coming from unknown sources somewhere in China but from time to time some very good units appear on the market for reasonable money so why not just try it right? here's one such example, basically a clone of Singxer SU-1 without power supply for third of the price, PCBA with everything ready for plug in the cables and 5V psu, there's even version with enclosure if one would like to have it in small and nice looking chassis here's link for the board https://www.ebay.com/itm/Assembled-XU208-XMOS-USB-Audio-Digital-Interface-XLR-AES-fiber-coaxial/222506096055?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20160323102634%26meid%3D8d57e60d379e47df8fc928d9d10ae35b%26pid%3D100623%26rk%3D2%26rkt%3D6%26sd%3D192317319223%26itm%3D222506096055&_trksid=p2047675.c100623.m-1 another source here https://www.aliexpress.com/item/Assembled-XU208-XMOS-USB-Audio-Digital-Interface-XLR-AES-fiber-coaxial/32804376744.html?spm=2114.search0104.3.157.60dc43a0LZXoGM&ws_ab_test=searchweb0_0,searchweb201602_2_10065_10068_319_317_10696_10084_453_454_10083_10618_10304_10307_10820_10821_537_10302_536_10059_10884_10887_100031_321_322_10103,searchweb201603_51,ppcSwitch_0&algo_expid=2b25e810-6ad2-4931-b437-93266ef1fc27-25&algo_pvid=2b25e810-6ad2-4931-b437-93266ef1fc27 and here fully assembled https://www.ebay.co.uk/itm/Hi-end-Finished-XU208-XMOS-USB-Audio-Digital-Interface-XLR-AES-fiber-coaxial-/192320632908 there's also some green version of the same board which according to info on the web should be the older V1.0 version I would assume psu quality will play a reasonable part of output quality so just make sure if you decide to buy one to obtain also good 5V 0.5A psu, below picture of the board, board contain KDS DSA321SDN oscillators which should be decent choice besides NDKs and all the important LDOs are ADP151, I haven't tried it yet but due to isolation both section of the board has to be powered separately so XU208 side from your PC and CPLD side with 5V psu it's small enough (board is 126mm x 76mm x 27mm) to be easily integrated into DIY PC or streamer of choice
  15. kukynas

    List of 4K titles

    another big update