[Glenn Kuras]

Originally Posted by Ethan Winer

You should also hang traps under the peak to avoid the inevitable focusing, as shown below.

--Ethan

Glenn Wrote:

As said you would need to move around to see, but I would start by setting them up in the back 1/3 of the room and treat the wall behind the drums and the peak above. You may find that treating some of the curved wall areas is necessary also. For the bass traps I would just put them along the floor, straddling the floor the wall corner.

Should I only be concerned about the peaks? What about the reflections coming off the rest of the "A" ceiling?

See above.