The single cuff will go anywhere, even onto power inlets on component chassis. This Polish review shows a few different applications and concludes that "comparing the effect of a single Booster against three was extremely interesting and informative. A single Furutech opened up the sound towards resolution and dynamics. Add another one or two and we get that plus a lower midrange that saturates more. Amazing". A precise duplex fit obviously depends on the spacing of your twinned outlet.

The video shows how simple installation is with four dual-sided stickers. Those who roll out the old argument—what can any of it do when cheap in-wall Romex wiring and miles of prior utility wiring precede our AC wall outlets—are reminded that a water filter doesn't care how many miles of rusty pipe precede it. What matters is what happens at the very end. It's simple logic.

Ditto noise traps. They work best in closest proximity to their final destination to leave no ingress room for subsequent airborne or AC-carried ultrasonic noise. Again it's the last few centimeters which count. With Furutech's plug cuffs, both ends of a power cord can be retrofitted with Nano Crystal Formula². That sorted, what is that effect? "Frank Hayama suggested that we include an NCF Powerflux power cord and a few NCF Booster braces. We hope you enjoy testing them." Given that my second GTO-D2 had one standard GTX-D duplex, I could test whether fitting a brace to that equaled the full NCF version.

Here we see the NCF duplex on the review loaner plus a dual and single Booster Brace with PowerFlux cord for good company.

A single Booster Brace on an IEC does its job even without permanent attachment stickers. NCF doesn't rely on an unbreakable connection to the component chassis. As long as it cuffs the power connector, its work is done.