Is there tweeter hiss? How silent is the A30a compared to the AO200?
Can you use native DSD upscaling (Roon, HQplayer etc.) with this amp as you would be able to do with any Sigma Delta DAC?
I have a QUAD S-2 hooked up to the A30a's speakers I'm testing.
I installed an ASIO driver on my PC and am currently testing continuous operation using files from PCM44.1 to PCM768kHz and DSD64 to DSD512.
It works perfectly fine so far.
This amp itself doesn't have his DSD upscaling feature. It simply converts the input signal to output.
PCM >> DSD, DSD >> PCM, DSD >> DSD, PCM >> PCM, etc. There is no problem switching to songs with different formats or songs with different sampling rates. I don't have any habits to worry about.
Even if you put your ear close to the ribbon tweeter of S-2, you will not hear the noise when there is no sound, just like the AO200.
Listening to the sound of the A30a makes me feel like the amps I've been using, including the PA5, are unnecessary.
This time also, Sabaj's response to my complaint was very sincere and enthusiastic. Product defects and troubles are never praised, but the brand image will be greatly different depending on the subsequent response.