JBL GX-A604 Owner's Manual page 8

GX-A604 SPEAKER CONNECTIONS: 3-CHANNEL OPERATION
Minimum speaker impedance: 2 ohms each (left & right speakers); 4 ohms (subwoofer)
• Connect the left and right speakers to the FL and FR (+) and (–) terminals
• Connect the subwoofer to the RL (+) and RR (–) terminals. (The rear-channel Bass Boost control makes the rear channels preferable for subwoofer
connection. See Set The Bass Boost, on page 12.) NOTE: You can connect two 2-ohm subwoofers in series to maintain the required 4-ohm
mimimum impedance for the subwoofer channel.
Front Left Speaker
8 8
Front Right Speaker
Speaker
Fuses 20A
Subwoofer