only bolting one side of the seat down or one side of the amp......seat bad...amp ok
a co0l lil trick to putting amps under seats. go get vercro, black spray paint, and a plastic for sale sign. cut the sign in the so it matches the footprint of the amp, and let it have lil taps that stick out far enuff to go under the rails of the seat. (were the seat bolts to the floor) so your for sale sign should look like a "T" paint it black to hide it. or what ever color you like. and velcro the amp to the sign. and remove the back to seat bolts. slide the sign between the carpet and the seat rail and put the bolts back in, going thur the sign.
the sing will bend to the curve of the floor, but wont let the amp move in stop and go, and its easy to pull up if you ever need too.
make sureeeeee you use a plastic for sale sing not a metal one