Using multiple drivers in a set of wired in-ear monitors is now standard practice, but the technique is relatively new to the wireless earbuds world. And for the first time — that we know of — Noble Audio has installed five drivers into each earbud in its new Fokus Rex5. You can preorder them today for $449, and they’ll begin shipping on November 29. We’ve seen wireless earbuds use up to three drivers before — Noble’s own Fokus Prestige uses an 8.2mm dynamic driver combine with two balanced armature (BA)…