Many people don't have the issue. So Yeah.I had absolutely no issue with RCA going from Qutest to A90. I used very short RCA cables and couldn't detect even a hint of noise on max gain and volume.
Many people don't have the issue. So Yeah.I had absolutely no issue with RCA going from Qutest to A90. I used very short RCA cables and couldn't detect even a hint of noise on max gain and volume.
I have the smsl sp200 which should be quite close from the 887 as well as the A90. I can confirm most of PCZ_97 impressions. A90 is slightly warmer (bass and low medium). the thx feels a bit more energetic though. Both units are really good. I was not expecting such quality for moderately priced units coming out from a Spl phonitor which just died.
I have no issue with the Element X internal amp, very detailed linear and good resolution but sometimes I just miss the extra bass/punch/rumble on some of the content I play on Element X. Will the A90 give me some punch/bass or warmth when paired with Element X? The A90 is just a simple plug and play on the element X balanced out if needed.
Since quite a few people complaining about noise on RCA, I would like to clarify here.It's not the only way to go. There are many cases there's no issue. People report only when there's an issue. You don't know the cases where it's fine.
As John Yang points out it can be pretty much a case of hit or miss whether you get hum loop problems. But with the Qutest the power supply is from a wall wart - so no ground connection. You would have been unlucky to get any ground loop issuesI had absolutely no issue with RCA going from Qutest to A90. I used very short RCA cables and couldn't detect even a hint of noise on max gain and volume.
I also have the Qutest connected to the shiit Jounheim and that's fine. How's it going with the A90? is the sound better perceived? is it worth upgrading to the A90 in your opinion?I had absolutely no issue with RCA going from Qutest to A90. I used very short RCA cables and couldn't detect even a hint of noise on max gain and volume.
Hey guys!
I am having a noise problem with my Topping A90 at medium and high gain w/ my DT 1990s. There is a very noticeable buzz even when the gain nob is at the halfway point on medium gain. I am using RCA inputs from my motherboard dac (SABRE 9118 DAC ) (don't have an external DAC yet, need to decide on which on to get) and the 6.5mm headphone out.
The thing is I don't get nearly any noise when I use my THX 887 with the same outputs/inputs. Would this huge difference be caused by the internal computer noise and the A90 being much more powerful? It seems weird that there would be huge difference between the A90 and my THX 887. If I can't figure this out I am going to have to return the A90 unfortunately as the noise is too problematic.
Do you guys have any thoughts?
It's not the only way to go. There are many cases there's no issue. People report only when there's an issue. You don't know the cases where it's fine.
Hi Monteh
The A90 has good sound. If you plan to purchase a DAC in the near future, you could wait to test it with the new DAC before returning it.
In my case I have the D90 and there is hardly any noise with HD800 headphones at maximum gain and volume when I connect it to the A90 through RCA. And when I connect an idefender to the PC, the silence is already absolute by RCA.
At least in my case and I suppose that in all the most common PCs, the leakage current of the PC and that can be transmitted through the wiring, is much higher than that of the rest of the equipment. DAC and amplifier.
It is also easier to minimize noise on a USB connection than an RCA if the noise source is the PC as I mentioned before.
Do you only have connected to the system, the PC and the amplifier?
If the noise source is the PC, I think that more than a buzz, a noise similar to that of old modems or similar to sound would be heard when the radio frequency of a mobile phone is coupled to active speakers. Typically, noise increases with PC processing.
The preamp is taken from the headphone out with a resistor.
It's basic understanding of electronics that earthed single ended systems are much more prone to ground related issues.To be fair, if Schiit gets ripped for all the past mistakes, then Topping deserves some heat for releasing a product that appears to have some basic issues with RCA outputs. What is the point in having a great measuring device, that you get noise from a basic single ended standard. Telling people to just return it (at the cost to the buyer), and then hope the L30 is better is pretty poor discourse, imo.
I have owned quite a few Topping devices, but at $500 the RCA issues documented by quite a few members, certainly makes me pause on buying this one in particular.
Because people don't like external supply....@JohnYang1997 why not make an external adaptor for sensitive audio equipment? My RME ADI-2 has an external adaptor. It's dead silent after I got rid of the usb ground. And the best thing is that I don't have huge plugs and thick cable on my desk. So why not do the same?
I am sure I am not the only one who likes external power supply especially if it solves the noise issuesBecause people don't like external supply....
So you can choose L30 and a50s.I am sure I am not the only one who likes external power supply especially if it solves the noise issues