topping a30 pro

Hi Everyone, I hope I am posting this in the correct section. I recently purchased a Topping A30 Pro to use as a headphone amplifier. When I was testing it yesterday, I had an RCA to 3.5mm cable plugged into the RCA inputs on the amp, and the 3.5mm end to my DAC. I wanted to test out a...

I'm a bit of a newbie...just received a Topping E30 and I am trying to understand if I have everything configured correctly. I use the E30 in DAC mode connected to a AAA 789, with an android phone running USB APP in bit perfect mode as my source for mostly 44.1 FLAC files. The phone is...

Hello, for sale is an essentially brand new Topping A30 Pro A Balanced Amplifier and a Topping D30 Pro Balanced DAC. I purchased this system recently and it is beautiful and works perfectly. But I cannot tell the difference between this system an a $100 DAC/AMP combo. So I feel bad having so...