Need a box designed for two tens!

[JakeNath]

Okay so my buddy needs a box designed for him. Not to high end of stuff but its good enough for him. All I need is a simple box designed quickly.

What he has:

2 10" Jensen Pros

1 Powerbank 2-channel

Dimensions:

The max length he can have is 50" across

Thanks for anyone who can design and thanks for your time!