Discussion in 'Digital: DACs, USB converters, decrapifiers' started by Torq, Mar 1, 2017.
Some people would buy a DAC in lieu of a Honda Fit - they bike and take public transportation
I would love to try Yggdrasil given Shiit’s Theta roots. I just want to hear it for a couple of hours and be done. I got no desire to change my front end - but want to try out new toys.
Is the Gen 5 and Unison USB the same or different boards? Local dealer listed Gen 5 as standard but on Schiit website it states Unison as standard so i'm a bit confused here.
Unison would be like gen 6 or 7.
I know we just started talking about it because many of us were already aware of the product before launch, but Unison is the current USB implementation for anything that was Gen 5 last year. Perhaps the local dealer still has Gen 5 products in stock.
I'm not sure if this is the right thread but is anyone here familiar with the Ayre QB-9 DAC? I did some searching and it seemed that @Torq has reviewed it before but I'm unclear which version he listened to.
While I have heard it dozens and dozens of time in both brand dac chip iterations, I haven't heard it in my system or in comparison with another dac. My friends aforementioned system sounds very good. One here seems to vehemently disagree with this opinion, so much as to dislike a post I made where I noted it was a very good sounding dac. LOL.
Sigh, my Yggdrasil died yesterday. Well I think it's the motherboard. So I had moved my Yggdrasil, Aegir, Wyrd onto a new power strip and hooked up to its own circuit (trying to keep the audio gear off the same circuit shared with my window AC unit and other electronics).
Everything was plugged in, turned on the Yggdrasil, did the usual startup sequence and everything seemed normal then all of a sudden the lights on the front panel went out. Tried turning it off and then back on, didn't start. Moved the Yggdrasil back to another AC outlet, still didn't turn on.
Ok maybe if I remove the XLR and USB cables it might fix.
Well as soon as I remove the USB cable from the back, I get a nice fireworks show with sparks flying. Scared me half to death.
And as soon as that happened my PC instantly shut down and won't reboot. Looks like it took out my PC's motherboard as well.
I'm really upset about this as it means another month without the Yggdrasil so it can be repaired and whatever the cost is, as this is a second-hand unit I bought from a friend here. And now I don't have a working PC.
Posting for sympathy during my distress.
Ouch. Reminds me of when my replacement Vidar died, along with the speakers connected to it.
Oh no that's horrible. What happened?
Holy shit, that really, really sucks Rob. What the hell happened? Geezus
Yeah I don't get how a USB can output that much current? Not an electrical expert so I dunno. Going to have an electrician come take a look at the wiring at my place so I can feel more at ease.
Like you, I rearranged some components. Loud pop and magic smoke when I turned the amp back on.
It's bad enough when something dies, worse when it takes other stuff with it. I feel your pain.
Maybe there isnt any proper over voltage protection where.you got the power. If you have modern power distribution it shouldnt be a problem.
That makes sense. I thought maybe the over voltage protection circuit in the power supply in my PC gave out and sent a voltage spike to the USB cable. But I ran a diagnostic with the PSU and it's fine.
Had an Emotiva DC-1 explode on me when I plugged in a USB cable last year. Different PC. It sounded like a bomb went off after I plugged it in and smoke rose from the chassis. I assumed my PC's PSU was the culprit but looks like I was wrong. Something must be going on with this AC outlet, I need to verify.
There might be some old distribution system maybe or some.error. For example some problematic ungrounded systems can rise voltage in one phase of your auxillaries when the other phase is under a big load. All kinda of.possibilities. There are a.lot of.questioable substation designs that are not favorable anymore. If only you have these problems then your wiring or devices are bad or missing.
I just bought a Modi 2 Uber from Schiit to hold me over. It ain't a Yggdrasil but I can't go without music for a month, hell even a day.
PC psus are suposed to have good protection when sourced from reliable companies. So then you have usb 5 volt which is likely voltage regulator. ( Edit. Voltage regulators only limit their output voltage and current, if you go over the rated ~40 volt DC input you are going to fry it) Sounds kinda strange. Maybe some voltage transient goes through the chain and manages to kill it still. Interesting problem..
Edit. 2 . I am currently trying to figure out how often surge protection and over voltage protection is used in the distribution systems. It is probably not in all of them, espescially older ones which only has high voltage protection on the substation side, where it cuts the connection incase of HV.
Man! That's rough... and also pretty unheard of! I don't really know, honestly. Wish I did!
I would think if this was something further upstream, it would go differently. Why the USB and seemingly nothing else? Most PSUs these days split all of their rails off of a transformer, don't they? So if something icky went through it, it wouldn't just hit the USB. Yanno? Further, pretty much all of them will simply trip or die when hit with power they don't like. This is a huge design consideration. Nobody making PSUs wants to have to answer to people with fried machines full of dead expensive components!
Maybe it's not voltage at all? The 5v rail on your average PSU can supply upwards of 15A unrestrained. There's nothing in there saying 15A is a fault. But if there's a fault in the port... failing part, bad connection, what have you, it could potentially wind up pumping all of that current down the line, which would definitely fry things. But probably no light show... just lots of heat and magic smoke.
But then, it might not even be related to the machine at all. If that much power went through those traces, it would probably cook them. I think it's actually more likely to be a fault with the Yggdrasil or the power going into that than anything to do with the USB itself.
now is when homeowners insurance is important, maybe it could fall under a short circuit type claim if covered.
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