For anyone reading this thread after the fact, beware that the AQ Type 4 is an entry level cable with an aggregate wire gauge of 16. The Thiel 3.7 is a speaker that retails for $12900. Its impedance is under 3 ohms for much of the frequency range.
Therefore, both the Type 4 cable, and the XPA-5(which warns of a minimum load of 4 ohms, as does the XPA-1) are a bad choice for a speaker that presents this kind of load. I’d suggest not buying a $13000 pair of speakers if you can’t afford to then buy a more substantial amp. I’m sure a Thiel dealer could make some recommendations regarding the amp that would be a much better fit.
Therefore, both the Type 4 cable, and the XPA-5(which warns of a minimum load of 4 ohms, as does the XPA-1) are a bad choice for a speaker that presents this kind of load. I’d suggest not buying a $13000 pair of speakers if you can’t afford to then buy a more substantial amp. I’m sure a Thiel dealer could make some recommendations regarding the amp that would be a much better fit.