honmashinsei
Previously known as okthxbye
- Joined
- Jan 23, 2010
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Quote:
All the best mate and I hope you enjoy the unit!
Thanks
All the best mate and I hope you enjoy the unit!
Trying to look at the data, it's difficult to decipher the problem. Many don't hear the tone, and at the 1-2.5khz frequency level that's been reported, it's well within the audible range for anyone. Those that do hear it can hear it with replacement units as well. I wonder if there could be big batches that are affected, so all from the same retailer would be from that batch. It would be more interesting if someone could find a unit with the problem and one without the problem (which doesn't seem to have occurred yet) then we would know it is a hardware problem somewhere.
I do notice a lot of the people reporting they can hear it seem to be outside the US. They probably do get completely different manufacturing batches. I also wonder if noise on the usb line could be affecting it based on the power grid operating frequency. The reports vary so much on this, it's baffling so far.
I myself don't hear any tone whatsoever with any of my headphones from highly sensitive IEMs to high impedance full size. It's been on 3 computers with 4 different usb cables and the behavior is the same. From reports the tone should be loud enough to be obvious.
Bummer for Nuforce
I ordered my uDac-2 directly from NuForce via Amazon and I have no noise at all. I am using it in the same room as cellphones, wireles networks and other wireless products so I do not think it has anything to do with wireless interference.
With so many uDACs sold and still being sold every day (we are upping the production to 3000 units per batch and these are mass production, so they are very consistent) and a few people are going to have incompatibility issues. If it doesn't work for you, we offer full refund.
I have a problem...I bought a new mouse (RAZER Lachesis) seems now my uDAC-2 doesn't work properly, assuming it's due to the report rate of the mouse (125/500/1000Hz)...if I unplug the mouse it works fine but soon as I plug in the mouse the uDAC-2 goes silent...so if there' no way around this I'll basically have to send the mouse back because it's useless to me if my uDAC-2 doesn't work...
Please don't speculate. All uDAC-2 are manufactured exactly the same. We sold more than 1000 uDAC-2 and I would attribute the noise that you hear to 1) human ears, 2) earphones compatibility or 3) system noise. The computer is never built to effectively isolate digital noise.
Many EU homes have no proper AC ground and that could attribute to higher noise (similar to Japan, this is a nasty problem for high-end audio). With a more sensitive uDAC-2, the problem might be exposed. Perhaps you can try to power up the uDAC-2 by connecting the USB type-A connector to a USB charger to power up the uDAC-2. Try it on different AC circuit.
Or just try to connect the laptop SMPS to a different AC circuit (or reverse the AC plug - for EU customers). If you can borrow a AC noise filter, give it a try.
If my recollection is correct, bcwang has super sensitive ears so if he can't hear it, few people can.
Jason
Is imbalance a normal problem with the udac 2? If I have the volumeknob at 9 o'clock or lower, I will get higher sound to the left. I guess this is common, but I just wanted to check.