With the Xs we start with a clean slate because the Xs line is of course new.
It is a large two chassis preamp built in a true dual mono arrangement. The circuit board materials are optimized for performance in each area, a power supply circuit board has different requirements than a gain stage and we use different types optimized for their specific uses.
Each channel has its own power supply board with 100,000 uf of capacitors combining several kinds for optimum performance from high reliability electrolytics to custom polypropylene. The use of newly available silicon carbide semiconductors kicks performance up a bit by dropping noise below the level of the XP30.
The gain stages from input to output connectors and all parts between them have been chosen for maximum sonic performance. We use a DC coupled ultra symmetric gain path with high bias class A circuitry. The power supply has lower noise with a refined circuit design and layout. New gain stages with auto bias and DC compensation keep performance at prime.
But it all comes down to the sound. When you go through the door that is the Xs preamp there is no going back.