I have been using knuconceptz wires for years without any complaints. My entire system is wired with there wire.If you are needing wire to complete the big 3 hit up scottiej he sells kits for the big 3 and he has them crimped with ring terminals on them already . I ended up getting 5 pieces (about 15ft total)of 1/0 gauge from him for my big 3 ..he charged me $36 to my door..shipped quick too paid him on tuesday and my wires were at my door by thursday