Subwoofer Placement in Large Room (30x50x14)

[conanski]

Currently the subwoofers are 1/3 the way on the same 50 foot wall facing the opposite 50 ft wall. So 15ft from the 30 ft wall and 15 feet between each other.

That is easily one of the worst locations you could pick for subs. Think of your 50ft building as a guitar string and pluck it at 1/3 the distance from either end, you setup a nice standing wave with complete cancellations at regular intervals.

The 18s will, maybe, go in each of the 4 corners, possibly facing each other with 50 ft between them.

Ty it out and see/hear what happens.

 

[MemX]

Would it not be easier to try all these options in the REW Room Sim tool? lol

 

[scottjoplin]

Have you compared a sim in the modal region to reality?

 

[Mitch04]

I do plan on running a simulator, just haven't downloaded it yet. I didn't realize these problems existed until I set up this stereo, my first stereo that wasn't in a car.

 

[conanski]

Your current subs are relatively small and easy to move so why not try out some of these suggestions with them. Simulations are a nice tool but they don't always take into account all factors affecting sound in the real world so often the results don't quite match up.

 

[Mitch04]

My current subs are sold awaiting pickup, otherwise that would be a good idea. I may just get a few rolls of wire and furniture rollers, move the 18s around as well as use the simulator

 

[MemX]

Have you compared a sim in the modal region to reality?

Fair point that sims do not always equal reality, but given the option of lugging four 18" subs around a large room or clicking and dragging a mouse around a screen, I know what I'd pick to start with! lol

 

[scholl]

Double bass array - Wikipedia

Anyone recommend a cheap delay?

With such a big room multiple mains may be needed too. Maybe ceiling mounts.

 

[scottjoplin]

Fair point that sims do not always equal reality, but given the option of lugging four 18" subs around a large room or clicking and dragging a mouse around a screen, I know what I'd pick to start with! lol

Yes, a sim is a sim and it has its limitations, but I was wondering whether you had compared the two, another member here did a sim of my setup and movements of subs and it did bare a resemblance to reality in my room

 

[scottjoplin]

Double bass array - Wikipedia

Anyone recommend a cheap delay?

It's not ideal, but you could experiment with this
Project 103 - Subwoofer Phase Controller

 

[MemX]

Yes, a sim is a sim and it has its limitations, but I was wondering whether you had compared the two, another member here did a sim of my setup and movements of subs and it did bare a resemblance to reality in my room

I must put my hands up to having done no detailed comparisons between sims and reality - well, other than simming my room and the only location subs could go, only to find my sofa was bang in the middle of a 30Hz null (IIRC), which was very much the case in reality once it was all in... lol