Topping A90 Discrete aka A90D
Aug 4, 2022 at 11:13 PM Post #92 of 546

carlcamper

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what's the:

  1. output impedance
  2. steps in the volume control
Thanks

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Aug 5, 2022 at 1:15 AM Post #94 of 546

carlcamper

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Aug 5, 2022 at 12:15 PM Post #96 of 546

enricoclaudio

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Last edited:
Aug 5, 2022 at 1:14 PM Post #97 of 546

De7mi

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Just got my A90D delivered. It came with Firmware 2.3 already and after connecting it to my Mac Studio with a USB-C to USB-A cable, the firmware drive came up on my desktop immediately. Sound is as good as my A90. Can't really hear any difference with my Sennheiser 660s or with my Sundaras. I have it set it up in High gain and volume at 65 is plenty loud for me. This is really the perfect companion for my Matrix Audio X-SABRE 3 :wink:

IMG_3174.jpeg
man such a beautiful and clean table and set up !
can you give us a full picture of the desk ?
 
Aug 5, 2022 at 1:25 PM Post #99 of 546

enricoclaudio

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Aug 5, 2022 at 2:11 PM Post #102 of 546

enricoclaudio

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Aug 5, 2022 at 2:12 PM Post #103 of 546

De7mi

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Been trying this amp for several times. Nice neutral-warm tone, and defitely better depth presentation compared to A90.

One question, how to change gain without remote? Sorry if silly question haha.
Check this link for update of firmware which is required to be able to change the gain without the remote.

https://www.topping.audio/newsinfo/663543.html

If you updated already you can follow this:
Users can change the gain to
high by pressing the volume knob and turning it clockwise by 2 steps in 1.5 seconds while the knob is pressed.
To change the gain to low, press the volume knob and turning it counterclockwise by 2 steps.
 
Aug 5, 2022 at 2:14 PM Post #104 of 546

enricoclaudio

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Quick tip: you have to use an USB-C to USB-A cable for the firmware’s drive to show up.
 
Aug 6, 2022 at 12:03 PM Post #105 of 546

hsg120

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Okay, so granted I am an admitted Topping fanboy, but I am so pleased with this amp!!

My only very minor criticism is that the LED color doesn't really match the rest of the X90 product line. No big deal though...

My main motivation for upgrading was because I had to run the A90 on low gain and with the volume knob way down at like 9 o'clock. There was a little bit of channel imbalance with the volume really low, and the volume was super sensitive.

I was hoping with the A90D I could run it at very low volumes without any channel imbalance. And I figured if I didn't have fine enough control over the volume level, I could adjust the volume on the DAC a touch.

I was pleased to discover that the A90D has extremely fine volume control, even on low gain. And, by virtue of the resistor ladder volume control, the channel balance is always perfect.

I sold my A90 before the A90D arrived so I couldn't do an A/B comparison, but I am so SO pleased with the function and performance of this unit.
 

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