Wide Room

[Stingray5]

Got a question about running sound in an odd size room. The depth of the room it is about 75 ft. including the stage and the dance floor. There is seating from the left about 75 ft, and to the right about 75 ft. The question is, if I took one 400 watt powered speaker and pointed it to one side, and took another one and pointed it to the other side, and pointed another one right straight in the middle of the dance floor would that be adequate, with two 1500 Mackie Subs in the middle also? Taking consideration that people the farthest away really don't want it loud any way, would that seem to work for everybody? Everything goes through the PA system. P.S. I did this job, with a speaker on the left side of the stage and a speaker on the right side of the stage and I turned them the best that I could to cover as much area as I could and including the dance floor, which is directly in front of the stage. It was adequate, but did cover as much as I would have liked it to. So would turning a speaker, on each side of the stage, completely side ways with one speaker in the center, cover better? Thanks, Denny

[flanc]

What main speakers do you have? Are they all the same? We need to figure the horn dispersion to make sure you have coverage. I have 4 identical to cabinets (EF508's) that have 60 degree horizontal dispersion. On rooms like that, I use all 4....2 per side strapped side by side to form two arrarys.

Give us more details about your top cabinets...

[tlbonehead]

I don't like that idea of one right in the middle. I'd do as flanc said and get four total cabs and array them,two per side. Less phasing issues.

[Stingray5]

Sorry, I'll try to be more specific. The speakers are MS 400 Yamaha with a 90 - 40 horn, 15 inch speaker, 300 watts on the lows and 100 highs. Let me make a cleare picture. If your standing on the dance floor facing the band, to your left, there would be tables about 75 ft. deep, same for the right side. There were tables across the whole width, so there were tables lined up with the back part of the stage. So I thought if I put the speakers at a 90 degree angle, that would take care of the sides. Then put one in the center for the dance floor, that would take care of it. P.S. Can't buy the MS 400 Yamahas any more, so I was thinking about getting a Samson DB 500a. I think that's what it's called, 500 watts. Even if I could have two speakers the same on both sides, I would have to still have turn one of them on each side of the stage 90 degree, to reach every one I think? Anyway that's the question. BY the way, I put the subs side by side on the floor in front of the stage, hope this helps. The way I set up sounded good. I got a lot of compilments on the sound. Until they decided to hook up a bunch of lights, on the same circuit, where half of the pa was hooked up to, during their first break. So on the second set you can figure what happened, pop goes the breaker. Well, that's an other story. Thanks, Denny

[tlbonehead]

Originally posted by Stingray5
Sorry, I'll try to be more specific. The speakers are MS 400 Yamaha with a 90 - 40 horn, 15 inch speaker, 300 watts on the lows and 100 highs. Let me make a cleare picture. If your standing on the dance floor facing the band, to your left, there would be tables about 75 ft. deep, same for the right side. There were tables across the whole width, so there were tables lined up with the back part of the stage. So I thought if I put the speakers at a 90 degree angle, that would take care of the sides. Then put one in the center for the dance floor, that would take care of it. P.S. Can't buy the MS 400 Yamahas any more, so I was thinking about getting a Samson DB 500a. I think that's what it's called, 500 watts. Even if I could have two speakers the same on both sides, I would have to still have turn one of them on each side of the stage 90 degree, to reach every one I think? Anyway that's the question. BY the way, I put the subs side by side on the floor in front of the stage, hope this helps. The way I set up sounded good. I got a lot of compilments on the sound. Until they decided to hook up a bunch of lights, on the same circuit, where half of the pa was hooked up to, during their first break. So on the second set you can figure what happened, pop goes the breaker. Well, that's an other story. Thanks, Denny I don't know. Could it be that the people sitting way back and off to the sides are trying to get away from the noise so they can chat? Usually,people that are there to listen will find the good seating area for listening. I would concentrate on the sound going there and on the dance floor. Use your main speakers for that and then if you want to throw a little 12" 2-way cab that you have lying around facing out from each side of the stage,go for it. BTW,you must be going strictly in mono,huh?

[Stingray5]

Yep mono it is, all seating is to the left and right its wall,stage,,dance floor, me set up aganist the wall every thing to the left and to the right realy spread out, Thanks for the imput. Denny. by the way suppose you had two MS400 PW. speakers on one side of the stage and say two PW. speakers from an other manf. like Samson I use them as an example since they have a 15 in them like the MS 400 would that create a problem?

[flanc]

Using differant drivers in the same bandpass is not ideal. But given your options, I would array the two Yamaha's on one side and array the two Samsons on the other. Check the horizontal dispersion of the Samsons and if they are more that 60 degrees, you might want to open them up a bit in the front when splaying them. (have the backs touch and have a gap up front). This would minimize overlap and phase issues.

[Stingray5]

Okee Dokee Gap it will be!! Thanks Denny.