Dynamic Bookshelf Speaker - Hi-Res Audio Certified The A300 speakers consolidate the nature of a studio monitor and retro wood styling into a functioning bookshelf speaker. Associate the speakers to one another with the interfacing cable and associate the speaker to your sound source with the included RCA and optical cables cables. These speakers are sold in sets out of the case and incorporates a remote. 65mm Aluminum Ribbon Tweeter The A300 utilizes a thin aluminum horn stacked strip tweeter which broadens recurrence reaching up to 40KHz high frequencies. The horn shape adds to a three-dimensional sound as the lace tweeter limits undesirable impacts from room reflection.