Thank you for choosing our products!
I don't think that going with three
iPower X is the best possible investment. I would instead try the
AC iPurifier. Why is that you ask?
You only need one AC iPurifier for the whole stack, so it will be better in terms of price-to-performance ratio. Eventually, you can get AC iPurifier and one iPower X for the DAC, which is the most sensitive. That's what we would do when building a budget setup.
When pairing your Topping PA5 with the Zen stack, please connect it to the DAC via RCA, not to the CAN. It's a shorter signal path, that should give you a better sound