AK4:
20 Feet 4 AWG Blue Kolossus Power Wire
3 Feet 4 AWG Silver Kolossus Ground Wire
One Waterproof Mini-ANL Fuse Holder with 120A Fuse
One 5 Meter Klarity Kable Blue OFC RCA Cable with Built in Turn On lead
20 Feet BLUE Klear Kable OFC 12 Gauge Speaker Wire
2 Gold Plated 4 AWG Ring Terminals, 2 Gold Plated 4 AWG Spade Terminals
6 feet Split Loom and wire ties
$38.99
K4:
19 Feet 4 AWG Metallic Blue eKo Power Wire
3 Feet 4 AWG Silver Pearl eKo Ground Wire
One inline fuse holder with 80A AGU Fuse
One 5 Meter eKo InterKonnect Blue OFC RCA Cable with Built in Turn On lead
10 Feet BLUE Klear Kable OFC 16 Gauge Speaker Wire
2 Gold Plated 4 AWG Ring Terminals, 2 Gold Plated 4 AWG Spade Terminals
6 feet Split Loom and wire ties
$24.99
Major differences in bold.