Top of the trio in Transparent's Premium series, and now in fifth generation guise, the (upgradable) Ultra combines a cable and filter network.
There's a very clear philosophy at work in all Transparent's cables: that 'wires' are unavoidable, so their bandwidth should be constrained to an appropriate range, banishing the egress of RF noise, and their lumped parameters – inductance, capacitance and resistance – be 'managed' to maintain a consistent and predictable performance regardless of the cable length. This, in a nutshell, is the rationale behind the in-line filter network that's part-and-parcel of every Transparent cable.