use the booth output to your sub amp so you can controll it

It’s fairly normal. Subs and tops - especially if differing brands will have different volume curves and different limiting points.

Often that means the subs overpower the tops at low volumes and then limit much faster than the high passed tops at higher volumes.

While you can put the subs on a separate output for some brands, with the Altos and cerwin vegas, you kind of need to run the signal through the subs to get the high pass.

Best thing to do is use a line mixer and use the channel eq as the night progresses

Weird things happen with frequency, wavelength, and a room's effect on them, as temperatures rise, but that's way above my pay grade.

Are you running your Altos, off the high pass through, on your CV? I think you should. Or use an active crossover, to low pass the sub, high pass the tops, and and adjust their volume separately.

Also, you probably should disable "contour" on you Altos.

Thanks to everyone for the help! I think I got the balance between the sub and the tops to be pretty good.

However, I am still having the limiter light flash on bass heavy songs and even when I am just talking on the Mic with no music.

Setup is:
From my DJ Mixer left and right cable into the Sub input 1 and input 2.
Then from the Sub thru 1 and thru 2 into each Alto TLS-115.

Settings on back of Sub:
Polarity Reverse - OFF
Vega Bass Boost - OFF
HPF Thru & LPF Sub - ON
Front Limiter Light - OFF
Main Volume - Never had it over half way (12:00 or less)

I don't know how familiar you are with the P1800sx. I started to look up how the subwoofer was made and how it works on the inside. I found out something that says that input 1 and input 2 for the Sub might be summed together. I don't know if that is how subwoofers work but I think that might be my problem. Are the 2 input signals added together which adds too much volume for the sub at times? If that is the problem, could I just run my system in Mono and only have 1 cable from my mixer into the Sub Input 1, then use a split cable from the Sub Thru 1 to go to each Alto?

Just to clarify: I am using only 1 subwoofer.

Thank You for all of your help and knowledge!

Do not put both outputs from your mixer to both inputs from the subwoofer. You will blow that subwoofer and wont be able to return it. THere should be only 1 input, 1 output on that subwoofer to jump it to another subwoofer. You should always match two tops for two bottoms unless you got a really good active subwoofer which is around the 1200 to 2000 us dollar range.

www.cerwinvega.com

polarity reverse -> off
vega bass boost -> off
hp/lfp -> on
limiter -> on

keep your volume knob at 12 oclock first to start, i honestly think 1 of these subs could handle 75 people max with satisfactory results.

Ignore all of that and go with what the manual says instead. You can take both outputs from your mixer and feed them into channel 1 and 2 of the sub without blowing your sub.


What you are doing here is correct, just like it shows you in the manual.
The link output sums up both channels in case you want to add an additional sub.


For this issue you might have to look at your gain staging technique. Get a good non clipping signal coming from your mixer first and then adjust your speakers accordingly.

I would go with what Logistical Styles said and check your gain structure.
From what you said, I would guess that the P1800sx has the limiter on the input level instead of the amplifiers output, which would be why it limit's when you're just speaking into it aswell. The JBL VRX subs work similarly from my experience. Its nothing to be worried about.

I stand correct, i think..

www.cerwinvega.com

page 19 reflects the situation i described, page 20 describes the situation you are currently utilizing.

corrected*

that sub can handle way more than 75 people. It's about on the level of the EV EKX18SP and maybe just a step below the KW181 (although it goes lower). Not great, but not bad either - firmly a midrange sub. I have a pair of the CVX18S subs which is the update to this and they're pretty solid. A single can handle a 150 person wedding no problem and possibly up to 200 depending on what your standards are.

Don't listen to this advice.

you take any time to look at the responses before responding with that. I wouldnt give anyone bad advice purposely. thats ok i'l take the demonizing on this one if it makes yall feel better.

a single 18" sub for 150 people? that's kinda pushing it. Maybe my standards are old school.

At a wedding... yes. At any other gig, no way. Old school is good though - keep up the bass!

clearly said for a wedding. Real dance party you definitely need more.

understood