Final stage selection and cable cross-section

Moin. I have to rely on your expert knowledge again. I need louder musi in the car again. I had a 1000. Pyle with self-construction Sub(800W) and rear storage installed. I gave away the power stage and cables when changing vehicles.So now something new has to come up. Since everyone is scolding about Toxic and Raveland sometimes makes better suggestions. Price so up to 250,- for the E stage and please specify with cable cross-section. Didn’t want to install 2 battery, ok?