New Behringer Amplifiers - Oh Oh.....

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I believe the QSC's are rated down to 2 ohms stereo mode for their PLX and PLX2 line, except for specific models. The ones ending in 2 will go down to 2 ohms stereo, the ones ending in 4 (2 specific models, the 1104 and the 1804) will not do it.
 
The crossover built in would come in very handy also, though I don't see a high-pass filter.

I see in their diagram that they have one gain control and 2 power switches though!
 
DJ Wes said:
Their Bi-amp illustration is screwed up too. Note how they show the speaker hook-ups. Wrong!
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I'm not seeing what's wrong with it other than the arrows going into the middle of the amp by the output and out near the edge by the inputs? That can be forgiven possibly?
 
DJ Wes said:
Chnl 1 should be going to the subs and chnl 2 should be going to the tops. The sub and tops are not daisy chained like they are showing.
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Why not? I do it like this all the time.

The diagram of the back of the amp shows channel 1 being on pins 1+ and 1- on the NL4 connectors, and channel 2 being on 2+ and 2-.

Using NL4 connectors and 4 conductor wire, go out of channel 1 output, into the sub, then a jumper to the main. Inside the sub pins 1 are connected to the sub, and then pins 2 pass through to the other connector, sending that signal on to them main speakers.

My system came like that from the factory, and I have configured many other bands and DJ's PA systems the same way. Make for a much cleaner setup, and it's foolproof, you can't hook them up backwards.
 
DJ Wes said:
Are you utilizing a built-in crossover on your amp like this Behringer has?
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Yes, my system has built in crossovers (see Dynacord XA4000 literature)

But, you can do it with a regular PLX amp with an outboard crossover also.

Any amp that has both channels available on one of the NL4 outputs can do it. You just need to get the NL4 connectors, 4 conductor wire, and make sure the subs and mains are wired to get the signal off the correct pins.

Let's say your subs are on channel 2, and your mains are on channel 1. Make sure your subs NL4 connectors are tapping off the pins 2 + and -, and the pins 1 + and - pass through to the other connector. then a short NL4 with 4 wire (or even 2 with 2 wire at this point) would just jumper to your main.
 
DJ Wes said:
It clearly shows on Behringers diagram that chnl 1 is LF (lows) and chnl 2 is HF (highs).
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It wouldn't matter which is which if the speakers for the system are wired accordingly and you are using 4 conductor cables.
 
I'll be the first to admit that I don't full understand all the technical wiring stuff you mention. Personally, I would run a speaker cable from chnl 1 to my sub and a second cable from chnl 2 to my tops. That way I don't have to look at how my connectors and speakers are wired up. I'm all for the easiest (yet correct) way to do things. I guess you could do it either way, if what you say is correct.
 
you are correct, you can do it either way.

however, if you take the time to do it with 4 conductor wire, not only do you have a much cleaner looking setup, but you really can't hook it up backwards. It would cut down on the amount of wiring you have to carry and run. Just one line to the sub, then a short one to the main out of the sub. (counting on the fact that the sub has 4 pole speakons in it here) Even if your main is 1/4" you could make a short speakon to 1/4" cable for the jumper to your main.

This all counts on the amplifier having both channels available in one of the NL4 sockets too, such as the QSC stuff and this new behringer one according to the papers.
 
DJ Wes, don't worry about not understanding the wiring thing. I have wired many PA systems up for other people this way that didn't understand it at first either, but they absolutely love the ease, quickness, neatness and accuracy (lack of being able to hook it up wrong) of doing it this way.
 
For my set up it's not really an issue because I center my sub and run a shot wire from my crossover to the sub. and then another wire to my tops. I think my setup is pretty clean looking and I've never hooked anything up wrong.

IMG_0676001.jpg
 
yes, it looks good and is probably correct for your situation.

The diagram shows 2 subs in the setup, not one.

The more complex the system is, the more important it is to have the wiring as easy as possible though. I had a 4way system a while back that I hooked one wire up wrong and POOF! a PLX3402 and a PLX2402 dead.

I also fried a tweeter driver by hooking up the subs and HF horns backwards once. There went 200 bucks!
 
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