Bleargh, I am right in thinking that the speakers are built into the marquee and that it folds back?
You're absolutely correct.
If you look at the
Gauntlet Legends page at KLOV you'll get a bit of an idea as to what the marquee section looks like.
Its designed so that it folds backwards and (magically) lines up perfectly with the top edges of the left/right sides.
When the marquee is in the upright position, the speakers are mounted on underneath the marquee, facing down towards the CP. One speaker each side.
Hang on... hey, I do have pictures here... lookee that... Here's
the thread for my build (which has languished since last May), which has a few photos at the top of it that'll give you a bit more of an idea as to what it looks like.