Anyone have anything similar to the converter

I recently designed a converter for the second voice coil for my Gallo 3.5 it will also work with the 3.0 -3.1 series 

In the past I owned many of Gallo upper class speakers and have tried high end external crossovers and amplifiers and well regarded speaker cables on the second voice coil I even tried bi amping  Gallo own SA amps but nothing comes close to integration as the converter

The one very nice thing and a money saver is you don’t need any additional amplification or speaker cables it can be used with your existing amplifier