I have a 12 inch bulkhead that runs across the middle of my room (side to side). Do I need to add any treatments to it like bass traps? It is not in the reflection points for my speakers, but wasn't sure what is best practice for a bulkhead. The front half of the room past the bulkhead has no seating.
The acoustic affect of "stuff" in a room depends entirely on their size and location. If you can post a photo that will help. But all rooms need bass traps and other treatment for best results. This short article is mainly about home recording, but all the same principles apply to hi-fi and home theater too: