ESD1.12 is a incredibly compact single 12" passive subwoofer system and this low profile design makes it a fantastic choice for discreet installations as it can be installed both horizontally or vertically. Delivers 124dB sustained output of tight, fast, controlled bass response at very high output levels from an incredibly small cabinet footprint. As with all KV2 Audio products, the ESD1.12 boasts output that belies it's compact, low profile cabinet size.