Jafant, yes, transparent cable's are good for the setup with your Thiel speaker's, also, Taralab's The One , speaker cable's and interconnect's, remember , the 400xi has better clarity, but the speaker's and high quality cable's have good clarity, the 400xi will have a tiny bit better slam, these two integrated's are different animals from each other, both very good, comes to specific system matching, the 300i will be warmer sounding, sometimes Thiel speaker's need some warmth, I hope you get one of these units 🤗