I just bought another set of soundqubed hds208s. I sold my first pair. My old box was about 1.8 cubes tuned to 33hz using a 4" aero port. The only problem I had was that some songs it would lose control and bottom out. My max dimension are 44"Wx17.5Hx5"D(top)x8"D(bottom) truck box. I can mayb go a bit bigger on box but will have to take measurements again because it's been over a year. Would a bigger/smaller box sound better. There going in a single cab 91 Toyota pickup.
Here's my old box:
Here's my old box:
