Has anyone had positive experience with using Crossfeed devices for speakers instead of headphones? The Taket Sound Activator device appears to be a crossfeed control unit and I am wondering if there are any DIYers on the forum who has built such a unit. The Taket is 150 GBP so I am looking for a cheaper alternative as an experiment to see whether crossfeeding is worthwhile for speakers. Witchdoctor.nz has a positive review of the Taket SA.