I understand that there is not a lot of sympathy for diy on this forum, but I’d like to point out that adapters for SDFB are easy to make, perform very well, and will save a lot of money. Today I made an adapter with 2 x 12 awg wire taken from Furutech S032N power cable. It replaced this home made adapter also with Furutech S032N, but a single run:
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This cable is made from 12 awg wire. I cut out the wire and doubled into similar Connex plugs (sans the outsides). Here are a couple of photos. Each wire is 9 cm long.
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Since the adapter sits behind my equipment, I didn’t bother trying to make it nicer looking. That could be easily done by sliding it into some carbon fiber tubing.
The 2 x 12 awg gives approximately 9 awg equivalence (according to an internet search). There is not a major improvement coming from switching adapters, but there is definitely minor improvement across the spectrum, especially with more power in the bass region.