[yyzSB]

They price matched a90 for me at apos

Price matched me too.

I go an email for 1 order from APOS and the other from Shenzenhaudio. The HTML order status email was identical between the 2 companies, except for the color of the text font. They both seem to be the same company.

 

[nigel801]

I got the D90 to pair with A90 currently connected with RCA wondering if XLR will bring any benefit and if buying expensive XLR would justify the cost or should go with Grimm TPR cables or World's best cables Mogami 2534 which are very cheap bring better result.

 

[KPzypher]

I got the D90 to pair with A90 currently connected with RCA wondering if XLR will bring any benefit and if buying expensive XLR would justify the cost or should go with Grimm TPR cables or World's best cables Mogami 3534 which are very cheap bring better result.

Yes on XLR (i was getting terrible noise on SE)

Don't waste money on expensive XLR interconnects.

 

[DaggerCola]

No doubt, A90 is another very well-engineered instrument built by Topping. Previously impressed by DX3pro for its low background noise level and here I receive additionally great impression on Topping's products.

 

[John Massaria]

the GRIM TPR work perfectly with A90+D90 - see my review https://www.head-fi.org/showcase/capistranocables-xlr-cables.24634/

I am selling the TPR I used in that review- perfect for stacked A90+D90 but not long enough for my Ray Samuels Apche rig - so i bough longer TPRs and short ones are now for sale https://www.head-fi.org/threads/gri...rfect-for-stacked-a90-d90-or-the-like.946519/

 

[nigel801]

the GRIM TPR work perfectly with A90+D90 - see my review https://www.head-fi.org/showcase/capistranocables-xlr-cables.24634/

I am selling the TPR I used in that review- perfect for stacked A90+D90 but not long enough for my Ray Samuels Apche rig - so i bough longer TPRs and short ones are now for sale https://www.head-fi.org/threads/gri...rfect-for-stacked-a90-d90-or-the-like.946519/

Thanks already bought WBC Mogami 2534 see how it works.

 

[John Massaria]

Thanks already bought WBC Mogami 2534 see how it works.

cool- you will hear differences when trying different wire for sure when the A90 is used b/c it's so transparent- I can also rec some all copper non shielded power cord but braided for EMI rejection

 

[nigel801]

cool- you will hear differences when trying different wire for sure when the A90 is used b/c it's so transparent- I can also rec some all copper non shielded power cord but braided for EMI rejection

Thanks for recommendation on Power Cord, I am currently using Arya sounds very detailed, but after comparing with Hugo 2 I find Hugo more enjoyable. I will keep the D90 for desktop and Hugo2 for mobility. I am not sure if 4.4mm cable and XLR has same output or different, currently using the XLR but want to try pure copper Pentagon cable to see if it makes any improvements over silver plated copper XLR.

 

[Gorillaphant]

Just got mine today. Looking for a bit of advice.

Here is my current setup:
USB Power + Optical Cable from PC --> Topping D50S --> RCA Input on Topping A90 using Schitt PYST cables --> Headphones.

So far I've heard a lot of hissing/static on the Single Ended and 4.4mm Balanced Connections. My understanding is that this is possibly grounding noise from using USB power. Is this something that could be solved by using an external power supply to the D50S instead? Or is there another route I can take to eliminate the noise?

Edit: Switched from PC-USB Power to external power via USB and no more hiss. Still using Optical Cable from PC to D50S.

 

[Ross Kyle]

Just got mine today. Looking for a bit of advice.

Here is my current setup:
USB Power + Optical Cable from PC --> Topping D50S --> RCA Input on Topping A90 using Schitt PYST cables --> Headphones.

So far I've heard a lot of hissing/static on the Single Ended and 4.4mm Balanced Connections. My understanding is that this is possibly grounding noise from using USB power. Is this something that could be solved by using an external power supply to the D50S instead? Or is there another route I can take to eliminate the noise?

Edit: Switched from PC-USB Power to external power via USB and no more hiss. Still using Optical Cable from PC to D50S.

If you get another DAC down the line , run it balanced to A90 (XLR) then that should eliminate any static fully , also running pc to something like a Rasberry Pi / HAT ie removing the direct link from noisy PC and DAC

 

[Lolito]

The a90 as a pre amp does not work as well as the hp amp volume so my suggestion is by pass a90 for speakers if u can

why?

 

[Lolito]

I second this opinion. As a preamp the A90 is lacking. Perhaps that is why Topping is making a dedicated preamplifier P90. It just is not nearly as good a preamp as it is an amplifier. But then again I bought a headphone amp first and a preamp option as a secondary option for flexibility if ever necessary.

Can you give the reasons why that is? you both say the same but you guys give zero reasons or zero explanation about why the a90 is not that good as a preamp, because I was thinking to get one, willl use it 90% time as active speakers pre amp, and 10% of the time as a headphone amp... But if you say it's not good... The volume knob is already too small to be decent, but probably you know more than me about this device so please explain it properly. Do not throw the stone and hide your hand right after.

No doubt, A90 is another very well-engineered instrument built by Topping. Previously impressed by DX3pro for its low background noise level and here I receive additionally great impression on Topping's products.

Well engineered is a GSX mini, a vioelectric. This is a cheap chinese designed, chinese constructed and chinese manufactured product, with less than a year out there, and zero references about its reliability in time. Not to mention that even without testing the device, you can already clearly notice that the design of the knob is quite a double facepalm... So, no, not well engineered really, at all.

 

[John Massaria]

2nd time I ordered A90 to give it second try - and second time I decided it's not as good as Apache By Ray Samules or my Pass WHAMMY w/Dual Opa627s - I am returning A90 iwithout regret

 

[Gorillaphant]

If you get another DAC down the line , run it balanced to A90 (XLR) then that should eliminate any static fully , also running pc to something like a Rasberry Pi / HAT ie removing the direct link from noisy PC and DAC

I ended up using the charger brick for an old phone haha but good to know that your method would also work.

 

[SolarBeaver]

Hey guys,
is it possible to use Sony wm1z DAP in a DAC mode as a dac for A90? Do I just need a 4.4 Pentacon (DAP side) to XLR cable (Amp side), assuming I want to use balanced connection?