Yeah, I'm with Drubin. Room treatments and speaker placement are the first things you should experiment with before laying out a bunch of cash. You've got a narrow and long room...narrow will give you big corner distortions (12.5' will give you a node at 42hz), and long (lots of cubic footage) will make it tough to keep sound pressure in the room.
Try some bass traps in the front corners, and some "triangle" absorbers for the upper front corners. Something in the intersection of the front wall and ceiling (right in the middle) will also help eliminate some slap echo and clean up low frequencies. Some companies with good products for these are: Echo Busters, Eighth Nerve, RealTraps, Acoustics First. The Eighth Nerve and RealTraps stuff is extremely affordable, and an excellent value for the improvements they will make in a room that currently has little treatment.
(disclaimer: I'm a dealer for Eighth Nerve and Acoustics First)
Not quite sure what you can do about the length of the room to keep sound pressure in except perhaps to "shorten" the room with some furniture or barriers to divide the room (bookcases, etc). What are your limitations in terms of aesthetics and functionality? It sounds like this room might be your living room?
Try some bass traps in the front corners, and some "triangle" absorbers for the upper front corners. Something in the intersection of the front wall and ceiling (right in the middle) will also help eliminate some slap echo and clean up low frequencies. Some companies with good products for these are: Echo Busters, Eighth Nerve, RealTraps, Acoustics First. The Eighth Nerve and RealTraps stuff is extremely affordable, and an excellent value for the improvements they will make in a room that currently has little treatment.
(disclaimer: I'm a dealer for Eighth Nerve and Acoustics First)
Not quite sure what you can do about the length of the room to keep sound pressure in except perhaps to "shorten" the room with some furniture or barriers to divide the room (bookcases, etc). What are your limitations in terms of aesthetics and functionality? It sounds like this room might be your living room?