Use hall in back wall as bass trap?

[capitalb]

I have a room that is 16'7''x11'8''x8'-10' sloped ceiling. The slope is length wise from front of room to back (8 feet front to 10 feet in back). In the middle of the back wall is a hall way, the opening isn't as tall as the ceiling it is around a standard doorway in height I didn't measure. There is a bathroom halfway down the hallway (with a door) and then the hallway leads into a kitchen...

I'm wondering if a room of these dimensions would be great for a tracking room for rap vocals. My main concern is being able to make the room completely dead on the bass end I'm assuming if I'm going the dead route.

I have enough fiberglass 2'x4' (2'' thick) panels to double them up and cover every wall to wall, wall to floor, and wall to ceiling corner, and on all reflection points two rows of doubled panels. I plan on using many blankets, duvets, unused clothing on all the rest of the bare walls and maybe the ceiling and esp. the back wall.

The back wall has the open hall way that leads into a kitchen about 12 to 15 feet down. How can I treat the hall way, or the opening in the wall, or the kitchen or all of it to prevent sound from coming back from the kitchen?
Should I put bass traps on the back kitchen wall that is in line with the hallway, which is around 20 feet further than where the hallway meets the kitchen?

Oh yes and please don't tell me it's bad to record vocals dead I've already been told! Lol. It's ok to track in dead in rap.

[Lights]

You don't need bass traps to track vocals. Even if you want them completely dry.

[capitalb]

Could you elaborate as to why, because I've heard this before as a minority argument, but the majority tend to disagree.

Gear I'll be using: Manley ref c, aurora audio gtqc, sparrow mk2 red (a/d)

[John White]

I don't really understand your layout so won't be able to offer anything towards that end. However, if treating another rooms is effective means that sound from other rooms can effect the room you are in. If a kitchen, that means the hum of the refrigerator, dishwasher, etc.

As for bass trapping a vocal booth, evidently the human voice (some) can extend well below 80Hz. I'd say that's well in the bass region. Do take precautions.

[gullfo]

Why not just make a standing set of panels to surround the vocalist. Then treat the room for even response but leave live so you can accommodate other recording situations.