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  1. Funny
    Middy reacted to ASRMichael in Chord Qutest   
    please stick to software then!!!!
  2. Like
    Middy reacted to ray-dude in Article: Reality Quest: Power and Digital Audio with the Sean Jacobs DC4 and Sound Application PGI TT-7 (Part 1 of 2)   
    The DC4 umbilical I have is ~3' long.  @Nenon and I have been chatting about giving a Mundorf silver/gold cable a try, but with holiday schedules, we haven't gotten around to that yet.  Given what Nenon and others have heard in other applications, I am enthusiastic about what an upgraded cable will bring to the party.
    If you're willing to place your DAVE on top of the DC4, the umbilical length can be quite short (<1').  For vibration control reasons, I'd prefer to keep each on its own stack, so the minimum length for me would be at least 18" (assuming side by side like I have in the photos). If you have a robust rack, then options clearly open up for a vertical layout.
    There are certainly many paths to power nirvana, and it continues to be interesting to compare the piece parts of DC3 and DC4. The 5V line is primarily digital, and the ±15V lines are primarily for the analog stage. Does it make sense to optimize these for different dynamic loads and noise sensitivities? Different wiring to reflect these loads/sensitivies? Different classes of filters? Being able to separate out the 5V line from the ±15V line is a boon for experimentation, and I continue to learn a heck of a lot about how different power aspects impact different aspects of sound (hence my longing to bring some object measurements to the party...with full measurements the optimization/tuning process would be a heck of a lot less empirical).
    Certainly compared to my DC3, the DC4 has advanced the state of the art considerably (to say the least). I suspect the next frontier is individual tuning of the digital and analog lines for a bit extra synergy with the particulars of the DAC, but we're definitely at the point of diminishing returns.  Of course, when we do fully optimize power for the DAVE, the audio gods will conspire to have that be the same week Rob announces his next TOTL DAC, so the cycle can begin all over again....
  3. Thanks
    Middy reacted to DAVE JS2 in Conversion of a Chord DAVE to DC power using two Uptone Audio JS-2s   
    Doing this will void your warranty on the DAVE, goes against the advice of Rob Watts (designer) and Chord, your experience could differ from mine for a host of reasons, and you are of course entirely responsible for any damage you do to your equipment (or anything else) in the process. I also realise it’s not exactly a solution that’s available to all.
    Notwithstanding all that, I wanted to share this in case it was of interest / use to anyone, as I have found the results to be excellent, and well beyond my expectations. I got what I consider to be a big step change up, not a small evolution.
    What did I do?
    Replaced the onboard SMPS within my Chord DAVE using two JS-2s (each factory modded to offer 15V from one output). There’s a link to a full description at the end of this post.
    The actual conversion was well planned in advance, but was a pretty quick & easy thing to do on the day; I am not the most experienced at this type of thing (its the first time I have ever opened up a bit of HiFi kit), and its entirely reversible if you’re even minimally careful.
    Why did I do it?
    I’ve been hearing for myself the extent of the role of the quality of AC and DC power in sound quality, and in the process finding the DAVE to be very sensitive to power noise & RFI.
    I’d read on another forum a post about having good results from doing the DC conversion. It made a lot of sense to me and felt it was worth a shot.
    How does the DC-converted DAVE sound?
    I thought it was already very good, but I’ve noted the following significant qualitative improvements:
    Performances are more toe-tappingly engaging, completely effortless to listen to, of greater clarity but also with greater smoothness, a very sophisticated sound, the performers and instruments properly feel like they are in the room with me, and I am compelled to listen to my whole library again.
    I perceive it as a significant step up rather than a small increment. I’m hearing new things in, and new aspects of, every track. I feel it liberates the rest of the DAVE, the SMPS was really holding it back. Its real music.
    To attempt to use hifi-reviewer vocabulary to describe what aspects of the sound changed:
    Much faster transients, highly detailed, better bass depth, weight and focus, instrument separation, even wider soundstage. It removes a sheen of harshness, sibilance is gone. All this is in the context of real musical coherence, rather than ‘hifi’.
    This improvement was independently verified by my good friend and fellow hifi ‘victim’ who came over to help me with the mod, and my eye-rollingly sceptical wife who says the overall effect of the new detail & in-the-room ‘presence’ is “creepy” - which I’ve taken as an endorsement 😉
    What were my expectations?
    Given my experiences with the ferrite cores on the BNCs and AC power cables to the Chord kit (see below), I felt / knew the DAVE was sensitive to electrical noise.
    So I was hoping for improvements to the classic symptoms of electrical noise e.g. reduced harshness & sibilance.
    What I wasn’t prepared for was the transient speed, bass depth & control and soundstage / presence improvements; ironically I felt these were already good (they’d been improved a lot by a mains spur & thick direct-wired power leads - again, see below).
    What’s the rest of the system?
    To give some context:
    Speakers and listening position are in equilateral alignment and care has been taken with siting in the room.
    The room has been acoustically treated (by me not a professional) to give a pretty flat frequency response. [Incidentally; in the past I used DIRAC room correction, and I’ve found doing it ‘au naturelle’ eventually gave much better soundstage / presence.]
    I use Roon with ethernet data going through a couple of Uptone etherRegens, the second one in the listening room and linked via SFP fiber to a Sonore opticalRendu, a single JS-2 powering both.
    The Sonore USB out feeds a Chord Blu Mk II for WTA upsampling, the output of which goes via Chord’s dual BNC connection to the DAVE [several ferrite cores were needed here to reduce noise from the FPGA in the Blu Mk II corrupting the analog section of the DAVE - its a known issue, ferrites are Rob Watts recommended work-around].
    An Uptone UltraCap 1.2 feeds 5V to the USB ports of both the Blu Mk II (I use a dual headed iFi Gemini cable into the Blu Mk II) and the DAVE [This is because i) their USB interfaces use USB 5V to power an internal USB clock; and ii) I have found by experimenting that sound quality is directly related to the ‘quality’ of power on those USB interfaces - even on the unused USB port on the DAVE].
    Balanced output from the DAVE (used in pre-amp mode) goes to a Krell FPB700cx which drives a bi-wired pair of B&W 800 D3s.
    There is a dedicated 40A mains spur to power the kit in the room, no fuses in the way to the main bits of equipment (there are RCDs and MCB of course). There is a combination of iFi active noise cancellation and ferrite cores on the AC power leads (which I made up myself from 6mm2 cables). [I put the ferrite cores on the DAVE and Blu Mk II power leads because I had some left over left over from the BNC ‘fix’, I got curious and tried it, and harshness / sibilance was improved.]
    How did I do the conversion?
    I’ve described it in this linked Google doc (with photos!) to try and keep this post to a vaguely manageable length.
    Special thanks go to Alex at Uptone for his patience when answering my questions and taking the time from his busy schedule to verify the JS-2s would do what I was asking of them before he allowed me to buy them :)
    Thanks for reading, hope it was of some interest!

  4. Upvote
    Middy reacted to bbosler in Article: Reality Quest: Power and Digital Audio with the Sean Jacobs DC4 and Sound Application PGI TT-7 (Part 1 of 2)   
    I don't have a FB account but it was interesting to see the person advocating for battery power as the better solution than linear supplies. I have no comment on which sounds better, but the idea that batteries are perfect reservoirs of energy with no noise is incorrect. They do produce noise, have limited current reserves, an output impedance that is frequency dependent, and their characteristics change as they age.  The ability of a lead acid battery to supply hundreds of amps to the starter in your car does not necessarily translate to the needs of an audio circuit. They are a viable solution in many cases, they just aren't the perfect supply that some envision.
  5. Thanks
    Middy reacted to ray-dude in Article: Reality Quest: Power and Digital Audio with the Sean Jacobs DC4 and Sound Application PGI TT-7 (Part 1 of 2)   
    The Qutest (esp. when fed with good power and upsampled content from things like HQPlayer) is some of the best bang for the buck in audio!  Very glad that @Fourlegshas been promoting this gem!
  6. Thanks
    Middy reacted to ray-dude in Article: Reality Quest: Power and Digital Audio with the Sean Jacobs DC4 and Sound Application PGI TT-7 (Part 1 of 2)   
    I don't have a Qutest, but I'm 99.9999% certain that the Qutest would be significantly elevated with better power.  Even with my Hugo TT2, better energizer power to the super caps has a surprisingly significant upside.  For something like the Qutest (or bypassing the battery on a Hugo2) I think it is definitely worth exploring if power makes an impact for you.
    Re the objective/subjective topic that @Archimagoraised, unlike a lot in audio, quality and attributes of power sources are VERY measurable.  In the case of these experiments, I suspect output impedance and transient current capacity are more impactful than any noise on the output, but the experiment with and without the CX noise filter on the output regulator of the DC4 (and what I highlight in part 2 when it gets posted), noise does have a material impact on sound stage and imaging.  I'd love to quantitatively characterize these power sources under normal operating conditions, then use subjective impressions to correlate to objective power supply measurements to see what attributes and performance measures move different SQ needles.
  7. Upvote
    Middy got a reaction from The Computer Audiophile in Article: Reality Quest: Power and Digital Audio with the Sean Jacobs DC4 and Sound Application PGI TT-7 (Part 1 of 2)   
    A great read, thank you... another good article for 2021 AStyle
    Never imagined i'd ever have a Dave and more than content to have a Qutest but i finally get to see a Pimp my ride version of 'Dave'.
    I am glad it worked so well and giving you pleasure Ray.
    Every bit of nice is need in these times..
    Really looking forward to part 2.0
    As so many questions with a TOTL upgrade now its a in MOLA MOLA and Bartok territory.
    Already you can see the magnifying of every detail people want to see. Objective subjective... a literal power struggle of PSUs...
    I cant wait. 
    Thank you ever so much for taking the time @ray-dude to document and post this artlcle.
    Happy 2021 to you and all.
    A non upgraded..
  8. Upvote
    Middy reacted to ray-dude in Article: Reality Quest: Power and Digital Audio with the Sean Jacobs DC4 and Sound Application PGI TT-7 (Part 1 of 2)   
    This may be a better conversation after part 2 is posted (re the Sound Application PGI TT-7 power line conditioners)  It had a pretty stunning impact for me across all my components (and my TV).  Diving into the details of the TT-7, it would be a very steep ask for component level power supplies to do similar filtering (although of course it is in the ear of the beholder whether than level of filtering has value)
  9. Upvote
    Middy reacted to ecwl in Article: Reality Quest: Power and Digital Audio with the Sean Jacobs DC4 and Sound Application PGI TT-7 (Part 1 of 2)   
    I have often wondered how much of the sonic improvement is due to a switch from SMPS to LPS thus reducing high impedance leakage current coming from the PC and how much of the sonic improvement is due to actual improvements to the power supply (noise in the DC current, impedance, etc.) Theoretically, one can test it out by feeding DAVE via Toslink using stock SMPS vs DC4 to compare.
    As someone who switched back to Toslink to avoid high impedance leakage current for DAVE, I have to admit it's a bit inconvenient.
    So at the end of the day, I think the system we want to have is the system we want to have. So if the DC4 upgrade is superior to the stock SMPS in @ray-dude's system sounds better, that's awesome. And it is great to be able to read about the experience and find out more about DC4. Very neat.
  10. Thanks
    Middy reacted to paulhynes in The Paul Hynes SR7   
    Hi Dave,
    Historically, there has been a wide variation between EU countries mains voltage and the EU sought to harmonize voltages across the countries. When it was realised that some equipment rated for higher voltage input may malfunction with a lower input voltage and that equipment designed for lower voltage input may be damaged with a higher input voltage, the specification was relaxed to a compromise of 230vac with a higher tolerance than initially set, with equipment manufacturers expected to accommodate the tolerance in their product designs.
    I often measure mains voltage around 240vac and occasionally just over 250vac where I live.
    Having the primary split into two allows for operation in series for the nominal 230vac (which is a comfortable compromise in the EU) or in parallel for the nominal voltage of 115vac (which is a comfortable compromise for most American grid systems which can vary from around 110vac to 120vac).
    There are several options for manufacturers using mains transformers in their equipment regarding compatibility with 115vac to 230 vac. Select a single primary winding for a specific area or use two primary windings with some method of switching between the two voltages. As audio enthusiasts often sell on equipment they no longer need to other enthusiasts around the world, it is more convenient for them to be able to set the mains voltage compatibility on the equipment and less costly than sending the equipment back to the manufacturer for a transformer change.
  11. Thanks
    Middy got a reaction from The Computer Audiophile in Article: Audiophile Style Podcast: Episode 1 | Roon Labs Interview   
    I remembered some members asked for Ram buffering.. as mentioned above for improving SQ. In this vain Chris maybe you pick out some AS member questions to ask but i can see the podcast was nice and informal so nothing too confrontational i hope.
    Suprised it is such a small team though for the size i perceived it was...
    More podcasts please, that was great.
    Happy new  year all
  12. Upvote
    Middy reacted to bobfa in Article: Audiophile Style Podcast: Episode 1 | Roon Labs Interview   
    Great interviews, very fun!
    It was nice to get some more history and to hear the passion that the Roon Labs team has for their software.  
    With a system as large and complex as Roon many folks have critical thoughts about what Roon has been doing.  I have been critical at times.  But I keep coming back, because it WORKS!
    More podcasts please!
  13. Thanks
    Middy reacted to austinpop in A novel way to massively improve the SQ of computer audio streaming   
    @Nenon That looks amazing! I’m going to be following the progress with great interest.
    Just for folks to know where to post regarding this... while this project comes to fruition, please discuss over on the main DIY server thread: https://audiophilestyle.com/forums/topic/58164-building-a-diy-music-server/page/
    Once builds are completed, by all means post your listening impressions and comparisons with other servers here on this thread.
  14. Like
    Middy reacted to Nenon in A novel way to massively improve the SQ of computer audio streaming   
    I normally don't do double posts in multiple threads, but I wanted to bring this one to the attention of more people in order to expedite the feedback process.
    In a nutshell, I am working with Emile from Taiko on a DIY server recipe that would share some of the technology the Taiko Extreme server uses. It will not be an Extreme server but something DIY enthusiasts can build. A complete recipe would be developed this year, perhaps in a new thread I would start. We are starting with a chassis to passively cool a dual Xeon server. And here is some info about the chassis.
    Any useful feedback would be highly appreciated before this gets to production. Please post your feedback in the original post thread, not here. It would help have all that at one place and not go off topic here. 
    And just to be clear on that - I have no financial affiliation with Taiko. 
  15. Upvote
    Middy got a reaction from The Computer Audiophile in Article: Review | DenaFrips Pontus DAC   
    Some of the comments are valid but i really enjoyed the review..
    I think you missed your calling in advertising, i wanted to rush out and get one..... your enjoyment shone through
    Thank you for taking time for us all to read.
    Have a wonderful christmas
  16. Funny
    Middy got a reaction from davide256 in Article: Review | DenaFrips Pontus DAC   
    Some of the comments are valid but i really enjoyed the review..
    I think you missed your calling in advertising, i wanted to rush out and get one..... your enjoyment shone through
    Thank you for taking time for us all to read.
    Have a wonderful christmas
  17. Like
    Middy reacted to ASRMichael in The Ultimate Network Solution   
    My Ultimate Network Solution  (local files)
    Few weeks ago I saw a post by @Nenon & @romaz about isolating the network completely by buffering an entire album then pulling the network cable out. I tried this a few times and can confirm this is the optimum (ultimate network) solution. There’s only one issue and that’s getting up leaning over and disconnecting the cable each time, and in some instances the cable falling down the back of the unit. Arrhhh. So this got me thinking! How do I automate the process?
    My Objectives;
    ·         Improved sound quality by Isolating the network completely by switching off the EtherRegen
    ·         Get back to listening to music rather than tinkering all the time and listening to the same reference tracks over and over
    ·         Stop the itch for spending more and more money on my network, switches, LPS etc
    ·         Buffer a full album, sit back and enjoy
    ·         My network to automatically come back online when the album finishes, ready to play the next album of my choosing.
    ·         All to be controlled from 1 App (My home automation app)
    My network configuration;
    Modem>Edge 12 Router>SFP>Edge X SFP>OM>EtherRegen>Server
                                                                                      NUC (As NAS)
    ·         All of the above are powered by SJ DC3 individual rails
    ·         NUC running Euphony (SMB Server only)
    ·         Server running Euphony Stylus+HQP
    Well here’s how I’ve automated the process…..(note this is not hard coding)
    ·         Using home automation software Demopad, like Crestron, I integrated Euphony into the Demopad App.  (There’s Offline software where you program the layout and commands,            then upload to the App, In my case IOS app)
    ·         Demopad – Centro 8m Box. Setup Macros/scheduled events etc, using IR, RS232, IP Control etc. (again programmed from Demopad software)
    ·         Sean Jacobs is building me a box to connect to the DC3 rail to the EtheRegen. The box has an IR sensor. Affectively the box is able to receive an IR command on/off. On being it            will send power to the EtheRegen, Off being, isolating power to the EtherRegen
    ·         I’ve added a few additional buttons to the Euphony library page; note the power slider with green button. Top right
    ·         Once I press this it pops up a menu asking how long you want to turn the network off for? 10,20,30 minutes etc. Each button is programmed for an event to happen in that                      certain time in the future.  The event would be to send an IR command (off) to SJ box, the rail that powers the EtheRegen
    ·         What I do is.. I choose an album of my liking in Stylus note rough time add and play let it buffer. Then click power slider, choose from how many minutes I want the network      s              switched off for, for example 60 minutes. Then sit back and enjoy.
    ·         After 60 minutes a command is sent to SJ rail to power back on. Bingo the network is alive again ready for me to choose my next album.
    ·         Note red button on my mains screen which has volume etc. There a red icon showing, this indicated the network is currently shutdown. If the icon is not showing red, and only                shows Euphony icon means network is up and running.
    ·         I’ve also added a countdown timer which shows how long before the network comes back on.
    I appreciate there might be downsides to this, like will power cycling the EtherRegen have any effect over time. I’ll find out I’m sure. Also how stable the EtherRegen clock will be. 
    I would also like to change the menu “shutdown the network” from 10,20,30 option to actually type in how many minutes you want, but it’s a bit more work. Maybe do in the future.  
    Will post further info once SJ box arrives, hopefully next week


  18. Thanks
    Middy reacted to Exocer in A novel way to massively improve the SQ of computer audio streaming   
    Hey All,
    There have been plenty of changes in my system over the last two months. Luckily each and every one of them yielded positive results to differing degrees.
    Addition of Mundorf Silver/Gold 15.5AWG wire between HDPlex and motherboard. This allowed me the ability to move from PF kernel to RT kernel without the harshness I experienced initially. Everything just sounds better. It is difficult to describe exactly what happened here. 1. Addition of DIY LPSU with SJ DC3 Recap and DC3 modules. (2 rails, 12v, Toroidy Supreme transformer, Mundorf Sg 18awg wiring). This is used to power one Buffalo BS-GS2016P modded to accept DC input. (no clock mods) and my Etherregen. Impressions: More clarity, less haze. More apparent presentation of tonal differences. Improved dynamics slightly More pleasurable presentation overall GentooPlayer V3 - Now using RT Min Kernel since it is compatible with Startech Fiber NIC. Compared to ST kernel on previous version, the sound is smoother. Some slight improvements with PRAT Paul Hynes SR7T - 12V to EPS 19v to HDPlex 800W DC-ATX Much less grain, especially in higher frequencies. Bass is quite a bit more controlled and prominent. I am now in the process of re-positioning the speakers due to the bass improvements. Much smoother and dynamic presentation While there was a sense of thinness initially (which concerned me) this went away in several hours and the sound is now rich, controlled and dynamic. Many small details have now become more audible. This is very enjoyable! Somehow tones just sound more "right". I wish I had a better way to describe this.  Largest noticable impact of anything listed. Upgrade of CPU from i7 8700T to i9 9900K (I have managed to get the i9 to run 5c cooler than the i7 8700T by adding thermal paste to the pipes where they make contact with the HDPlex H5 sidewall and aluminum top heatsink). More effortless presentation More "fun", the dynamics have increased my heart rate in songs i've listened to quite a lot. Improvements in staging and depth!  Second largest impact!  
    There are some plans to introduce more audio specific Ethernet and USB PCI-E cards in the future.
    There are no fancy clocks within this build and I am still using a Mini-ITX board so there may be additional gains in going with a full ATX board with more direct to CPU PCI slots etc.. Will plan those upgrades for next year if I see fit.
    Edit: I forgot the SFP changes - this would rank up there wish the largest differences.
    I preferred the Finisar "1321" to any other SFPs i've used.
    Really enjoying the system as-is!
  19. Thanks
    Middy reacted to sunny_time_99 in A novel way to massively improve the SQ of computer audio streaming   
    Hello and thank you for your question. At first I would like to give only marginal information about my power supply unit. With over 6 years and currently over 600 comparative power supplies built, the development path was complex and expensive. I am just self-taught and a hobbyist who wants the best power supplyfor his hobby. I had a well-defined goal that has now been achieved. Since 2016 I have been using active rectification, a material selection that has been tried and tested over countless hours, a CLC Filter, an active filter element that is placed in front of the regulator attenuates the noise floor by an additional 50-60db, a modified high-performance regulator (mostly LC58xx). I have recreated almost every circuit concept (so far there are more than 45 variants) and subjected it to extensive listening tests. My current power supply consists of the essence. The amazing thing after this trail is how easy the circuit is at the end. What I am going to present here in a few days is not a cheap or low budget project - only the mini PC is. I have been using the Futro for 6 years now and have replaced it with a NUC7i7 for a about a2 years periode and run it with Euphony. For 2 years I liked it better and I had 4 NUC7s to compare the software and hardware modifications. Basically I have the same device several times, because only then can modifications actually be tracked and optimized. As an audio PC, the Futro has many advantages: - Fanless design
    - Favorable price (leasing returns, often available for a few euros)
    - Made in Germany !!! Although it now operates under Fujitsu
    - Only one power supply unit (20V) required
    - modifications are easy.
    @Tanomek7, I've tried almost every power supply on the Futro - including the original power supply, of course. But it is just as unsuitable in terms of sound as the original power supply unit of the NUC. You need al lot of magic until a smps sounds really good.
    I would like to present a solution here that clearly beats a NUC7i7DNHE e.g. with SR7 in all cases. So it should be clear that it should not be a low-budget project.
    Please, please, if you want to implement this method, do not try any ZeroZone power supplies, Chinese cheap products, Farad3, HDPlex, or comparable power supplies. They just don't do it! There will be no magic at the end. If you want to implement this path, please only use the best power supplies on this planet.
    To answer your question further, I use the Neutron Star 2 (3 works too, but I still have 4 unemployed Neutron Star 2, the Neutron Star 3 has no direct advantage through my power supply.) I supply the Neutron Star from the 20V of the futro. The maximum voltage is 24V DC for NS2 and NS3, so that's not a problem. In addition, I use an active filter element and a 10,000uF capacitor in front of the Neutron Star in order to achieve decoupling from the computer. There will be a voltage drop about 1V, so the NS2will run at 19,xx V. There are different stages of expansion, with one NS2 it starts – at the momet I am going with 2 Neutron Stars in my Futro, in a card reader, 2x to supply the Futro internally and later also the USB / Ethernet adapter from Ugreen, which I use. The nice thing is that all 4 devices are supplied with 25MHz. In the last few years I have converted a number of Futros in different versions for friends.
    Users with 19V power supplies can rest assured. Most of the Futros also start with 19V  
    A little more patience…. Sunny

  20. Upvote
    Middy reacted to sunny_time_99 in A novel way to massively improve the SQ of computer audio streaming   
    The active output is for "square can oscillator replacement" - if you want. It has a voltage input from the circuit you want to feed. So the NS2 and 3 don't need to be set to a special peak to peak voltage like 3.3V or 5V. (for the coaxial output you can choose 1.8V Pk-PK, 3.3V and 5V).the actice output is doing that for you. Both outputs are isolated but its not square wave.
    For very short distances and unkown pk-pk voltage and a 4pin Oszillator, use the active output.
    The coaxoutput can do the 4pin oscillator replacement also, but its good to check it with an oscilloscope if the signal is exactly from 0-3.3V e.g. Sometimes you need a variable resistor to adjust it, if its not perfect. Lars is showing it on the NSInstall page.
    The impact on the sq is not that big. The active is a bit clearer if you really have 4-5cm distance to the place where the clock was before.
    With one neutron Star, a 20 Bucks mini fanless PC from Ebay you can build the NUC7i7/Euphony Killing device. Much higher resolution, higher dynamics, better music flow and definition of instruments. The step up in sq is higher than using a Buffalo switch, ER instead of not using it. If someone is interested, i can post it here. I am using that device for over 6 years now. for 2 years nuc/euphony was the better configuration. But with that clockmod, my actual psu and a freeware...i sold all my 3 NUC 7i7 that i got for comparison.
    Regards sunny
  21. Upvote
    Middy reacted to Superdad in A novel way to massively improve the SQ of computer audio streaming   
    Very clean and tidy work! (Looks nicer than some commercial products we have seen. )
  22. Like
    Middy reacted to elan120 in A novel way to massively improve the SQ of computer audio streaming   
    This is a short update on my earlier post about adding one more PF Buffalo switch in series.
    I had some time over a week ago to finish modifying my second Buffalo switch, after close to 200 hours of burn-in, the result is very much aligned with others that have done this before me.  Not only are all of the improvements with just one PF Buffalo still there, it now adds even more of the clarity, dynamic, and air between the instruments.  Soundstage gets to a new level, the music flows even more enjoyable.  After a while, I just listen to the music instead of comparing, and I start to lose some motivation making more changes.
    In addition to the modifications I did for the first switch, I changed the mounting for Pink Faun clock board from hard mount to soft mount by using 4 of the vibration damping standoffs, added vibration damping sheets to the chassis, and bypass capacitors at the main board DC input.  I will also be experimenting with adding EMI/RFI absorbing sheets to see if it will help.
    Below are pictures showing the soft mount and finished switch.
    Soft mount standoffs:


    Finished switch overview:

  23. Upvote
    Middy reacted to austinpop in A novel way to massively improve the SQ of computer audio streaming   
    Looking forward to your listening impressions!
  24. Like
    Middy reacted to Exocer in A novel way to massively improve the SQ of computer audio streaming   
    The SR7T arrived today. Its the two rail 19v, 12v option. So, the CPU will receive a dedicated 12v rail and the 19v output will go to the HDPLEX 800w DC-ATX module.
    Everything powered up without issue.
    Thanks @austinpopfor the timely sale of your PHD cables.
    Super excited to give this a listen!

    I will be comparing the SR7T to the HDPLEX 400w AC-DC SMPS power supply, which actually sounds very good in combination with the HDPLEX 800w DC-ATX device. Until now, this SMPS allowed me to hear subtle differences in kernel types, resources allocation tweaks, memory tweaks and various SFPs. It is a solid starting point for those on a tight budget.

  25. Thanks
    Middy reacted to RickyV in Buffalo GS20xx - Bypass 12V stage via 3 external PSs   
    wow Soul it has become an elaborate switch.
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