fitero
Member
You are absolutely correct, which is one of the reasons why I kept my trap shut.
No. You can use either. The amount of current is what is available to be used. The device is not forced to use it.For a possible power supply, does it matter 5V 1.5A or 5V 3A for the D50? I can get the first but not the latter.
Expressing subjective expressions are fine. Just don't try to convince others because then you get in trouble here. Indeed I like to hear if people are happy with their purchases based on stuff I recommend.You are absolutely correct, which is one of the reasons why I kept my trap shut.
Thank you Amir. It's tempting to order the D50 with the aliexpress sale, but I'm not in a hurry. I can order from within EU import-duties free later on anyways I'd still like to see how the QLS-HiFi DA9.1 holds up before I make a decision.No. You can use either. The amount of current is what is available to be used. The device is not forced to use it.
The DX7 was the first of your objective measurement posts that made me say "wow this thing packs a ton", came close to your Exasound in most of the tests!You made the right call. The DX7 occupied a very sweet spot in price/performance. DX7s lost that formula. I use the DX7 as my "daily driver," listening to it while I work. It has a great luxury feel for a reasonably priced unit.
If anyone finds a quality 5V SMPS for the D50, please post it here! The USB power off of my desktop is terrible, very audible noise through the line outs of my Oppo HA2-SE when connected to my desktop via USB (uses the ES9028-Q2M, by the way). May just be an issue with the HA-2SE, can't be certain. Much rather connect it to my Furman PST-8D conditioner than noisy USB
Only data I've found on a handful of SMPS's is here on ComputerAudiophile.com. Original poster tests ripple across the audio band.
https://www.computeraudiophile.com/forums/topic/31119-power-supply-8-group-test-lps-and-smps/
Hi there captain. Welcome to the forum.Hi Amirm,
I previously fell into the non-objective, entirely subjective grasp of other sites and reviewers. I climbed out of that hole after some questionable purchases based purely on someone saying "this is golden and you need it but I have no data to explain why". I have an Aune X1s/X7s stack. I replaced the X7s with an Arcam rHead amp and I am considering replacing the X1s and selling the stack. My question is this, do you think the Topping D50 will provide any improvements over the Aune X1s? Link here to Aune's page is for the newer version of the X1s where I believe they only upgraded the amp portion. I have the older, non-anniversary version.
http://mall.auneaudio.com/index.php?route=product/product&path=25_61&product_id=52
Perceptions of noisy USB power supplies interfering with audio peripheral operation are often due to ground loops.
A separate 5 volt supply of even modest quality and price will address the ground loop.
USB hardware that is well-designed will reject any USB power noise pretty aggressively all by itself.
In another post, I wrote how I had added a 5V SMPS with the USB data cable connected to my desktop, which still results in noise. Unless the data cable is still drawing power from my computer. Any explanation for that? I've temporarily switched to SPDIF until I figure out the issue (which admittedly, I have had no time to troubleshoot).
In another post, I wrote how I had added a 5V SMPS with the USB data cable connected to my desktop, which still results in noise. Unless the data cable is still drawing power from my computer. Any explanation for that? I've temporarily switched to SPDIF until I figure out the issue (which admittedly, I have had no time to troubleshoot).
Ground loops are caused by misaligned ground potentials, not current.
Yes, thanks, what I should have said was the data cable is utilizing pins 1 and 4 rather than just data +/-
I solved the issue, thanks to @zephyros 's suggestion.
First covered pin 1 (5V) with electrical tape - still noisy
Covered both pins 1 and 4 (ground) with electrical tape - no noise
Removed tape from pin 1 - no noise.
So it does look like it was a ground loop caused by the ground of the USB data cable. Any issue in covering/removing the ground pin?