Few Tuning Questions

[Budah93 7]

I got my 2500d today in the mail and i want to make sure i get it all tuned up nicely so i don't damage anything. I went completely brain dead about where to put the lpf and ssf so if you guys could help me out on that? My box is tuned at 35 hz. Secondly I have my dmm and I'm thinking I would set the gains somewhere around 1500 watts, so √1500= 38.73 would that be an ok tuning for my sa15s or should I turn it down a bit? I know they are rated at 600 a piece but I've been told by multiple people on here that they can take more if the power is clean. I'm just listening to music on them so I don't need it cranked up but I want it to be able to shake people inside of my car.

[Impious 1,476]

LPF set to taste by ear. Number doesn't matter, just where ever sounds best.

SSF set approximately a half-octave below tuning, which would be around 26hz.

Gain set by ear.

[Budah93 7]

So just turn my music up to where I listen to it and adjust gain until is sounds good?