Spirit One: Focal's around-the-ear, closed-back headphonesDesigned to be used on the go, one pre-requisite for the first Focal hi-fi headphones was for them to have optimal sound insulation. The technical specifications: keep unwanted, ambient noise out so the Focal sound could be heard unhindered. That challenge has been successfully met with the Spirit One, around-the-ear, closed-back headphones offering an impressive set of technical features.
