True Ribbon™ CA-1A. The world's first Circum-Aural ribbon headphone monitor!

Both packages include a one year manufacturer warranty. Headphone only package ships with just CA-1a Circum Aural headphone, no cables or interface box included, Standard Package ships with the CA-1a Circum Aural Ribbon Headphone and complete TI-1a package which includes:

TI-1a Transformer Interface
HPL Cable for connecting TI-1a to conventional 4-pin XLR headphone level amp output
SC2 Cable for connecting True-Ribbon™ headphones to TI-1a interface