Hello everyone im new to the forums just made an account today but I've always looked for info on here just finally made an account. I recently ordered my dd1 recently and finally got it home today. Ive always had friends tune my amps in the past but this time I wanted to give it a try myself. My amps are autotek sm4 1000.4 and autotek MM2500.1 if yall needed to know. When I go and set my gains up on the amps im not sure what to turn up and down. I have went through all the topics and couldn't really understand much so that's why im asking. 4 multi amp it says put in full and db at 0 but for the LPF and HPF do I just crank both all the way or leave it alone? Because it says turn frequency all the way up. Im new to tuning so I am unsure on what to turn up or down on HPF and LPF. Mono 0db subsonic, level, bass nob, and LPF so do I put the bass nob all the way up and crank the subsonic and LPF all the way before I do the ggains? Im not too sure on subsonic and LPF If yall can help guide me through this that would be wonderful and any information is appreciated thankyou everyone!