Rockford Fosgate Power bd1500.1 Operating & Installation page 16

• Connect the two NEG Speaker outputs together using an eight gauge wire no longer than 15".
• When bridging 2 units together, Unit 1 PHASE must be set at 0, Unit 2 PHASE must be set at 180.
• Unit 1 (PHASE set at 0) Connect (+) terminal to (+) Speaker terminal.
• Unit 2 (PHASE set at 180) Connect (+) terminal to (-) Speaker terminal.
• When bridged do not exceed minimum impedance of 4 .