Pair of crossovers for Alto Line MKII.
Floor Standing Speaker.
other parts required for this box see links below for full Box spec.
http://www.pqsound.co.za/index.php?main_page=product_info&cPath=17_115_116&products_id=834x 4pcs
http://www.pqsound.co.za/index.php?main_page=product_info&cPath=17_115_117&products_id=916 x 2pcs
http://www.pqsound.co.za/index.php?main_page=product_info&cPath=17_115_120&products_id=932x 2pcs
and below is the link to the actual box specs
http://www.visaton.com/en/bauvorschlaege/2_wege/alto_line_mkii/bauanleitung.html