Signal Cable vs. Element Cable for Subwoofer

Each company will make a y splitter subwoofer cable for L/R RCA inputs for my subwoofer. Other companies like River Cable, Impact Acoustics, and Zebra Cable will not make the y splitter cable.

If you have any experience with the subwoofer cable for these companies or comparable company that has bested these companies, I would appreciate your input.
I had Frank at Signal Cable make me a splitter for my REL subwoofer and I'm very pleased with its performance and build quality... it was an instantly recognizable improvement over the stock issue cable. I can not speak for the other manufacturers...
i did ask frank to double run sub cable very good result.