CLEARANCE - Audiovector QR C Centre ChannelQR C The QR C centre speaker is equipped with the same advanced drivers as the other speakers in the QR range. Double chamber AMT treble driver with gold plated S stop mesh and Pure Piston sandwich drivers. With its dual bass reflex ports, it has been configured to give maximum listening pleasure with a wealth of detail and unrestricted dynamics in any surround sound system. For further details, including technical specifications, please click here.