Topping A90
Mar 9, 2020 at 7:48 AM Thread Starter Post #1 of 1,442

bahamot

500+ Head-Fier
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Announcement:
https://www.facebook.com/2495577743786403/posts/3098350043509167/
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Measurement:
https://www.audiosciencereview.com/...of-topping-a90-headphone-amp-prototype.11946/
https://audiosciencereview.com/forum/index.php?threads/topping-a90-headphone-amplifier-review.13592/


Known spec so far (from measurement thread):
- 250mw@UNBAL
- 0.135Ohm BAL
- 0.06Ohm SE
- SMPS power supply (2x Meanwell IMR 20-15)
- Composite + feedback topology

Full spec:
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Internal photo from: https://www.audiosciencereview.com/...-headphone-amplifier-review.13592/post-410653
 
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Mar 10, 2020 at 7:24 PM Post #4 of 1,442
I'll admit I'm not a big fan of the SQ of the THX-AAA based amps, or op-amp-only amps in general, and I doubt the A90 will do anything to change my mind.

But I always try to keep an open mind (and ears) when auditioning new gear, so who knows.

But after seeing the ASR preview, I'm sure all the Measurement Phreaks are like....

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Apr 29, 2020 at 8:51 PM Post #5 of 1,442
Really interested in the following combos:

SMSL SP200 ($300) -> SMSL M400 (~$600)
Topping A90 (~$500) -> Topping D90 ($700)
Drop THX 789 ($300) -> Gustard DAC-X22 ($1000)

Sabaj D5 DAC & Amp ~ $400
 
Apr 30, 2020 at 5:40 PM Post #6 of 1,442
I'll be honest I wouldn't by the A90 @ $500.

*Edit* it's good enough to buy... Guess I'm eating my words!
 
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Apr 30, 2020 at 6:39 PM Post #7 of 1,442
Apr 30, 2020 at 7:39 PM Post #8 of 1,442
400 would make it competitive
 
May 17, 2020 at 1:38 PM Post #10 of 1,442
Yep both the Topping D90 and SMSL M400 are priced too high for what they are. I'll look for them is the $200 price range on headfi in ~18-24 months.
 
May 17, 2020 at 11:28 PM Post #11 of 1,442
Really curious to hear some reviews. I'm worried that it measures amazingly and sounds....alright.
 
May 18, 2020 at 4:14 AM Post #12 of 1,442
Today they lunch it.

The lowest distortion AMP ever built. Even APx555 couldn't measure it. And it is new design not like other THX.
 
May 18, 2020 at 10:53 AM Post #14 of 1,442
"The lowest distortion AMP ever built. Even APx555 couldn't measure it."

After I read that I think that just means the difference is in-perceptible to the human ear thus the marginal increments in this & from here out means nothing.
 

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