Hi! I am currently using Topping D30 + Ifi zen can amp. Will there be a big difference in sound quality if I change the D30 to ifi zen dac (signature or regular version)? I use LCD2c headphones if this important. Thanks!
It will depend a bit how the digital filters on the CS43198 DAC in the Topping are set up, also this chip has a few options how to supply it with power, which make a notable difference IME. Set with a similar digital filter and optiammly supplied with power the CS43198 can sound very similar to the DSD1793 implementation in the ZEN DAC.
Given the limitations the (undersized) power supply included with the ZEN CAN imposes, I would suggest to look at a power upgrade first, unless you only drive high impedance and high sensitivity headphones.
Thor