Is it vital to have 2 PA speakers?

[fdeck]

I'm sure it depends on the intended use. This would be for jazz combo gigs at relatively low volume in small venues, where the keyboard and bass tend to be either acoustic or self-amplified, and a PA is only for reinforcing a singer or horn player.

I've got the pieces to assemble a simple PA with one lightweight speaker.

My question is:

Is it vital to have two speakers? What would be the harm of having just one speaker on the bandstand? Of course I'm tempted to try it regardless of anyone's advice. But I always welcome both technical and practical knowledge, and I know that there are TB'ers with much more expertise on sound reinforcement than I have.

[modulusman]

One speaker can work just fine as long as it can cover the room. If you need to cover a wide area you could run into problems. What speaker do you plan to use?

[JimmyM]

i've done it before when i was doing a solo gig. worked fine tonally. so you lose stereo but for a live gig stereo's not important.

[Jefenator]

I've done a zillion gigs that way. I call it the "point source" method. I love the simplicity of it.

I try and put the single speaker in or near a corner so most folks get a decent line of sight to it. Mics in front of the main can be tricky but there's been no feedback incidents on my watch.

[GianGian]

I can't see the problem. I feel ripped off when I go to big shows and I notice that the sound is stereo. I mean, if I am on the right side I hear only half of the noise.

[WayneP]

Originally Posted by GianGian

I can't see the problem. I feel ripped off when I go to big shows and I notice that the sound is stereo. I mean, if I am on the right side I hear only half of the noise.

Yup – stereo PA systems are a stupid idea.

Regards,
Wayne A. Pflughaupt



Pedulla Club #45
Administrator, Tobias Club
Big Cabs Club #23
My Rig: Stage and FOH Friendly

[JimmyM]

i agree, and yet, all pa systems are stereo. what gives???

[WayneP]

Huh? Where did you get that idea?

Regards,
Wayne A. Pflughaupt



Pedulla Club #45
Administrator, Tobias Club
Big Cabs Club #23
My Rig: Stage and FOH Friendly

[JimmyM]

ok, well they all have the capability for stereo. sorry i wasn't exactly specific there, wayne.

[WayneP]

Okay then. You had me worried there!

Regards,
Wayne A. Pflughaupt



Pedulla Club #45
Administrator, Tobias Club
Big Cabs Club #23
My Rig: Stage and FOH Friendly

[T-Bird]

Hi.

IME, it's better to have one decent speaker than two or more crappy ones. I'm one of those people who has done "single point" PA gigs as well.

Originally Posted by WayneP

Yup – stereo PA systems are a stupid idea.

Regards,
Wayne A. Pflughaupt

+ 1000

Originally Posted by JimmyM

i agree, and yet, all pa systems are stereo. what gives???

My guess is that the STEREO hype has just stuck from the early days. In fact, there's a lot of mixing desks that don't label the main outs as left and right.

Stereo is not the way (creative ) sound engineers think about the two main outs. To them they're just two semi-independent (pan control) outs. Usually one is used for the mains, the other one for other purposes.

Regards
Sam

[KeithAlanK]

Just because there are left and right spkrs doesn't mean a system is stereo.
I'm running a big PA that's fully stereo-capable in mono these days.
Except for being able to pan some guitar to the off-side (away from his loud but awesome Mesa Boogie) I can't really think of a good reason to bother with stereo.

With speakers, it's always a coverage thing.
Some rooms need more stuff to help everyone hear the music correctly.
If you can fill the room with one cabinet, go for it!

[steveksux]

Originally Posted by JimmyM

i agree, and yet, all pa systems are stereo. what gives???

I bet 90% of the stereo mixers out there used for PA have everything panned to the center..

Randy

[MNAirHead]

If it covers the room, then who cares.

[rpsands]

It'll work well to have a single PA main if you know its dispersion angle and plan accordingly. The challenge here is getting uniform volume throughout the room with a single speaker.

What tends to happen is with the normal angle of even a good quality PA cab (90 degrees or so, maybe 110-ish) you're forced to either have dead spots or set it on one side of the room and aim for coverage (and also have it farther away from the audience). Doing the latter means you're going to have it be a little quieter on one side of the room (ranging to much quieter in a very big room).

So tl;dr: You need to tell us more about the design you're using. If I was going to use a single speaker solution I'd recommend you go with one of Bill Fitzmaurice's designs, myself. They are excellent at filling rooms from one spot.

[Passinwind]

Originally Posted by fdeck

My question is:

Is it vital to have two speakers? What would be the harm of having just one speaker on the bandstand?

It is often quite difficult to get both good monitoring and good house coverage with just one cabinet. My last jazz trio worked with no monitors most of the time, but we often used two cross-fired cabs in front to allow the diva and the keyboard player to hear themselves. In many cases only one cab was really covering the room and the other one was essentially a monitor. Worked fine for us.

[Passinwind]

Originally Posted by steveksux

I bet 90% of the stereo mixers out there used for PA have everything panned to the center..

Yep. The only thing I typically use the stereo function for much is effects, which IMHO and IME often sound exponentially better that way. It is also pretty useful to have independent EQ on each side of the FOH stacks.

[fdeck]

Thanks for the excellent tips!