Has anyone has any experiences with these? as below
http://www.pioneer.co.uk/uk/product_detail.jsp?product_id=602&taxonomy_id=25-130http://www.pioneer.co.uk/uk/product_detail.jsp?product_id=602&taxonomy_id=25-130
i want some additional bass to the system, but need a self contained sort of unit so it can be removed etc fairly easily and quickly!