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Computer Audiophile


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About Cornan

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    Experimental audiophile & curious musical explorer

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  1. I have actually tried various JSGT in my system. Some of them makes the SQ much worse. My understanding while experimenting is that the network switch noises that actually travels via the JSGT ground wires into the other devices via the starpoint connection of the JSGT AC mains plug. Remember that my power distributor is positioned after the IT. My guess is if I connect the plug to the same AC mains wall inlet as my IT the noise will be forced to go through the balanced & floating IT back to the Gophert/Aqvox instead of being speaded around inside the floating walls of my setup. Right now my best option is for sure to connect the JSGT from Gophert to Aqvox switch to the Entreq Minimus grounding box, but I will try to ground it to the AC main wall inlet as soon as I have moved to my new place in February.
  2. Thanks a lot @One and a half! Awesome that you took the time to provide an illustration. So do you mean that with this my balanced isolation transformer will sound better with grounded center-tap instead of with floating center-tap, which sounds much better to me right now? It is almost like a JSGT (John Swenson Ground Tweak) for the LT3045s DC- output, right? Interesting for sure since I do have a toggle switch on the balanced IT if I quickly want to check how this scenario sounds like with grounded center tap. A couple of questions though: 1. Do it have to be used with a single PSU or can I try it first with my three Gophert csp-3205IIs? 2. Is there a reason why I should not use my star earthed power distributor? I do have a star earth receptacle (green banana socket) on the star earth wired power distributor (see below). I should be able to use that for the JSGT on the LT3045s, right? Micael
  3. Thanks @One and a half! I already use 3 pair of LT3045s in series in my setup (pre Aries mini: 15v>14,3v 1A, pre ISO Regen: 8v>7v 500mA and pre Aqvox switch-8: 6v>5v 500mA). All the pairs have 0.7-1v drop-down and each are powered by 3 Gophert csp-3205II floating SMPS (0-32v/5.1A max). It is possible to power all devices with a single Gophert csp-3205II but since Aries Mini requires 14v and Aqvox/BluWave requires 5v the voltage drop-down will be too much if I set the Gophert to 15v and drop-down to 6v at the first LT3045 IMO. I prefer to keep the LT3045s cold rather than hot. Maybe to add this LM317 voltage regulator pre the LT3045s for the Aries Mini? My only problem with this is that the LT3045 sounds much better IMO. Lets see if I get this right with your suggestions? First of all I use 1A LT3045s where needed already (Aries Mini). No need to use them in parallel. With the grounding it almost looks like a JSGT (John Swenson Ground Tweak) at the DC- output of the LT3045s. Correct? I already use DC- output grounding on the Gophert powering my Aqvox switch, but it is connected to the Entreq Minimus grounding box since it sounds much better in my setup. I pressume this is due to the dual floating setup that I use with floating SMPSs connected to a balanced & floating IT? I guess there is simply no 0v reference that is connected directly to the protective earth, so the noise will return back to the setup via the JSGT ground wires. Can you let me know why I should do this instead of connecting everything to a star earth wired power distributor as I do right now? Is´nt my Gopherts already star earthed do you mean? My only problem with changing anything is that it sounds truly great right now. I have been using a single Gophert powering everything before (via a DC terminal strip) and it did´nt sound nearly as as it does right now.
  4. Here is also something to shred some light why different ports on a network switch matters. It is all about magnetic boxes.
  5. So this is your way of being on topic do you mean? "You are putting out ridiculous information."
  6. Guys please! If you are against something, start a thread about it. Remember what this thread is all about. The true experimental tweak thread. I think that @The Computer Audiophile can confirm that I have the right to set the guide lines for this thread. You are welcome to join if you have something to add in the context of this thread. It is about being nice instead of throwing pies.
  7. SMPS and grounding

    Thanks! 😊 I was wondering if the Brooklyn DACs internal SMPS was grounded or not? Now I do not need to open it up and check myself.
  8. Your welcome desbiss! 😊 There is quite a lot of things that could potensially increase SQ for a router as well IME. A new router and optimized settings ofcourse, but also AC mains DC Blocker, F-plug DC Blocker (if your router have satellite input) alt ethernet isolator (if router have ethernet input), AC mains voltage regulator, isolation transformer with floating secondary etc. I personally also isolate the router and Aqvox switch with a wireless adapter (wired to the Aqvox switch and Aries Mini). I use the TP-Link RE450 with good results, but I'll guess the RE650 is even better. With a switch it is also important to use one only for audio. That one should have input ethernet cable to port 1 and output ethernet cable to the last port. Grounding the GND screw is very important as well as DC- output grounding as @Monge posted you a link to! 😊
  9. I would be very interested in your findings Al! 😊
  10. You´re welcome desbiss! I used battery supplies on all of my previous 5v network switches and used the same type on Aqvox switch-8. I did try the original Aqvox SMPS without DC- output grounding, but found battery supplies much better. Now I actually use Gophert csp-3205II floating SMPS into a floating IT which I found better than the battery supply. I am quite sure a good LPS will improve it as well. I am not sure if iFi iPower will better Aqvox own SMPS or not since I have never tried it myself. However, since you have it will be quite easy to try it out together with DC- output grounding with the Aqvox and see how it turns out. If your system is very resolving and you are listening to a lot of Tidal it is IMHO equally important to upgrade the power supply for the router as well. A LPS is a good start.
  11. Paul Hynes is one of the best LPSs out there. He have recently released his valuable option SR4. Not yet sure where you can butpy it though. That website seems not to be updated with his new LPSs. Maybe someone else here can let you know how to order from Paul Hynes?
  12. Actually, the Aqvox switch-8 is perticularly great with Tidal. I actually consider it as one of my best audio related purchases. I listen 100% to Tidal and would never trade the Aqvox for another switch. Maybe just upgrade it to the SE version. I have'nt tried your specific Netgear switch in my setup nor the iFi iPower, but a bunch of others Netgear and TP-Link switches. Aqvox beats them all with Tidal. According to others the Aqvox switch do not improve local content as much. It is definately worth to try a better LPS or battery supply for the Aqvox switch. Despite what Aqvox say. If you use a SMPS you should consider DC- output grounding and ground the GND screw as well.
  13. Sure, it is a very complex system. It sounds great though! 😁 You had some questions: 1. All devices require different voltages. The only two with same voltages is the Aqvox switch and the BluWave. I am planning to power those two from the same Gophert but will have to order a couple of LT3045s in order to get that project going. Since I am moving to another place in a couple of months it will have to wait. I can quite easily consolidate ISO Regen, BluWave & Aqvox switch into one plus Aries Mini and Brooklyn into one. I will need to buy additional voltage regulators though. 2. I have no idea about the inter-winding capacitance of my ATL balanced IT, but I did ask him to use the transformer with lowest possible inter-winding capacitance. Since it sounds great and better than my other two ITs I am happy. 3. I am using a 2-pole RCD/GFCI at the output of the IT and it has a fuse at the input (exept a central circuit breaker panel with RCD/GFCI). Is'nt that safe enough you mean? The toggle switch have a safety cover. I am not touching it while powered on. 4. All my Gopherts are connected to the same starquad wired and star-earthed PSD, so they are star arranged (as well as all the other gears connected to the PSD) AFAIK. 5. No, the Entreq Minimus do not have a connection to protective earth.
  14. DIY DC power cables

    I have never cared for impedance match with USB cables. Infact all of my not so good USB cables do have optimal impedance. I do think that the capacitive coupling should be minimized. This goes against impedance match since you add capacitive coupling to control the impedance AFAIK. As with most things in audio I use my ears to decide if it is good or not. To answer your question. No I am not able to ensure impedance match with the starquad USB cable, but it still sounds great. 😊
  15. My intire system is connected to a star-earth wired PSD into a balanced isolation transformer. All my DC powered devices except the Brooklyn DAC is powered by floating SMPSs. The Aqvox switch and the DC- output powering the switch is grounded to a Entreq Minimus. All the DC cables have dual inline LT3045 voltage regulator a close to the powered device (not the Brooklyn DAC since it is powered by it's internal SMPS). The balanced IT have a toggle switch at the outside of the case where I can choose to ground the center tap or float it. There is a major difference in SQ having the center-tap floating. Grounding it clearly decrease SQ. Where do you mean that I should add ground connections? I have grounded a lot and if I ground it to anything but the Entreq Minimus it usually turns worse with a edgier sound. I have a star-earth receptacle on the PSD. Not even that one beats Minimus in my setup.