The 620R Subwoofer is a low profile double 12-inch enclosure that is only 9 ¼” high. It is designed for high output situations where height and front dimensions need to be minimal. The 620R features two 12” woofers with 4-inch voice coils for low power compression, high power handling and a 4-Ohm total impedance. This allows for more power out of a four Ohm load so the speaker can be powered by smaller or less expensive amplifiers. This sub is a good choice where high output out of a small front area is desired.