Depends on the specs on the woofers and how loud you need to get them to play. That amp is rated for a minimum of 2 ohms so to get the most power you want the combined impedance of the two 18s to be 2 ohms.
Depends on the specs on the woofers and how loud you need to get them to play. That amp is rated for a minimum of 2 ohms so to get the most power you want the combined impedance of the two 18s to be 2 ohms.