Filter Filters Escalade EXT Remove All Filters Price $100-$500 (3) Condition New (3) Brand Harmony Audio (3) Make Cadillac (3) 2002-2013 Cadillac Escalade EXT Underseat Harmony R104 Dual 10" Sub Box... $356.99 2002-2013 Cadillac Escalade EXT Harmony Audio F124 Dual 12" Sub Box Enclosure $259.99 2002-2013 Cadillac Escalade EXT Underseat Harmony A122 Dual 12 Sub Box Enclosure $280.99