The rear riser is 14" tall. Thus one step up at 7" to the platform. This also allows you to see over the heads of the front row while in reclined position.
Make certain to reinforce the risers, and fill with insulation. Otherwise you will have a very large resonance chamber...
Good luck.
Make certain to reinforce the risers, and fill with insulation. Otherwise you will have a very large resonance chamber...
Good luck.