$62.99 SoundBox Connected 0 Gauge Black Amplifier Amp Power/Ground 1/0 Wire 50 Feet SuperFlex Cable 50 
WindyNation 4/0 -Gauge x 3/8-in Pure Copper Cable Lug (25-Pack) in the Lugs department at Lowes.com
Ancor Heavy Duty Lugs - 4/0 Gauge Wire - 5/16 Post - 2-Pack - 252725 | Anchor Express
