Thank you Allen

Glad to hear you are building your own it is a very rewarding experience 😊

Great idea in theory but in practice you will need to charge the ultracaps every 3 h or so and that can be dangerous over a long time accidentally shorting one. the UCPure disengages from the caps via relay so it does separate I think Ian did a nice clever design.

@@Gabster1 Regarding the danger. I think it's too late to think about it since you've already dealing with the ultracaps and you can't instantly switch them off if something will go wrong, isn't it?😁 More often you charge UCs or less often - this is a secondary question. Good, but second plan question. Regarding theory... This is not a theory, my DAC works exactly this way many months already. Not as automated as with UCpure power supplies, but the principle is the same. The charging PSUs themselves are placed in a separate case. I do mainly listen with the power supplies connected, as during the day the music plays in the background. But for responsible listening, I turn off the PSUs manually (5 multipin connecting cables). The influence of these five cables in my case is audible even if they are connected only to the DAC (removed from the PSU case) chassis, not talking about PSUs themselves influence especially when they working. 🤝

Gael, see my comments above. Email me if you want some guidance. Its a fantastic system with enormous potential.

Good eye Rob yes the meccano comes handy sometime you must be from my generation to spot them 😊

There will be a more detailed build video 😊

Thank you Ian's Opa 861 is as good if not better I did a Video about it kzfaq.info/get/bejne/i6hihst5rtKxpY0.html

Hi Philip it should be a bit better but it is hard to test it as this one does not have any i2s output the idea here is to eliminate a lot of middle parts it is a direct as can be from rpi to analog without preamp, with all ultra caps. I wanted to stay away from batteries. a linear PSU connected to supercapacitors is a 3d best option after batteries to supercapacitors. the differences are small but every 1% counts and adds up.

Thanks will do, I am very curious as well how it stacks up against the big guys

I may have went too far with the streamer adding a screen did not cause any changes in the sound specially if you keep it away The plan is to have the entire screen outside the Chassis with extra metal casing for it.

Hi John The Ucpure accept AC 12v and have a built in dc conversion (diode bridge) and regulation so no need it will be direct ac 12v to UCPure Gaby

Ian has a new version that can charge on idle music time and between songs so you can run mostly on pure mode

@@Gabster1 sounds like Ian is on the ball that was just me thinking out loud above but it seems Ian has been working on a way to accomplish what I was thinking of without having to double the amount of supercaps. Looking at the quality of the gear your using Gabby its obvious you have an ear for quality so you captured my attention, right now I listen mostly on headphones focal clear mgs with the focal arche dac/amp. We moved house and now have someone below us who I doubt would enjoy listening to my music through the ceiling but having great quality sound is still important to me the arche is a fantastic dac but there's always room to improve especially if I could build it myself for a fraction of the £2.5k that the arche cost.

Check out the 3 Macintosh video few demo songs in there

Ropieee xl running as a Roon endpoint

Thank you

Nope... That's the part that for me doesn't really stick. If the DAC itself never is fed by the PSU, then it doesn't matter if the PSU is a high end or a wall brick with noise. What it matters is that it keeps the capacitors charge. Same as filling a water bucket: It doesn't matter if the water comes from a cup or a hose. There are other things that as a objectivist and science/measurement driven person I would simply point as not accurate or "snake oil" but I learned to respect the others and their believes. Who knows if I'm not going to be suprised also and proved wrong?

@@black.phoenix. Yeh, there is much in the audiophile world that is just taking suckers money. I see so many just wasting their money on things that have absolutely no impact on the actual audio. In this case the only thing that needs the high end clean supply is the DAC and then anything in the analogue path after that like preamp and power amp, opto isolation on the digital feed to the DAC is also an easy win . The digital domain will not benefit from expensive stable supplies at all. Unless things are so bad that the digital stream is being corrupted in some way requiring some form of error correction it's a waste of money. Same thing with jitter correction, totally unnecessary unless you are transmitting the audio over tens of metres of cable. Better to save money where it doesn't matter and spend on better DAC and analogue path components.

@@schrodingerscat1863 exactly that. The ones from the jitter is the ones I love to debunk. I worked in telecom and yes there you need jitter correction and have attenuation problems, specially in xDSL that use from the 4Khz band up (normal POTS voice use under that). But we are talking of KMs not less than 20m inside the room of a audiophile in cables. Attenuation is non problem. Close to the equipment you can have 24Mbps downstream no brain. After 1KM it drops to 16Mbps. The trick is always try to get the max speed by keeping the attenuation in the line above 13dB. That will be 2 dB less in the winter and rainy/humid days. Under 10 is mostly a connection that fails some times a day, under 8 the equipment can't negotiate a connection and mostly is no service. Of course we are talking about through a pair of copper wire who get sun, cold, hot, humid, etc through is entire life on a pole and it was the cheapest available at the time or never replaced in 30 years, in thin gauge, not the size the audio cables are, 12 AWG. So if I was able to give a customer 8Mbps down/1Mbps up at 3Km of where the xDSL equipment where with shitty copper cable, an audiophile can hear everything a music have to give in his room with a 12AWG oxygen free copper cable that cost 40 dollar a role in the hardware shop. And don't talk about the skin effect. Skin effect is only prevalent in high voltage scenarios, tens of KV, so high voltage power lines. Audio doesn't work in such ranges of voltage, so again a non problem (that some cable manufacturers love to point - I'm talking about you Abyss).

@@black.phoenix. In data transmission jitter can be a problem but in these audio systems it is travelling no more than a few inches so is not even close to being a problem at the data rates involved.

@@schrodingerscat1863 read my entire comment please. We are saying the same but in different wording.

Click on the show more in the description :)

Thanks