Biamp, Bridge Mode question
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Posted on Feb 26, 2008 04:55 pm
mclir9
www.witchsmark.com
Member Since: Aug 13, 2006
My setup:
2 EP2500 AMP
1 QSC850 AMP
2 Peavey PV118 Subs
2 Peavey SP2 Enclosures
I would like to Tri-Amp this configuration. I am running Mono from Mixer. Obviously I am Bridging one of the EP2500's to the Subs, so that takes care of the Lows. Now for the Mids/Highs... The SP2's are 500W Continuous and my 2nd EP2500 only puts out 450W per channel. The SP2's are preconfigured for Biamping. Should I run the Mids from the EP2500 Bridged and if so how the heck do I accomplish this having to re-wire the 4wire Speakon cable to work bridged and the whole time using the QSC850 to run the Highs in Parallel Mode?? Do you think I should leave the EP2500 for the Mids in Parallel Mode and run the SP2 MIDS seeing that the Lows and Highs are being taken by the other EP2500 and QSC, maybe the 450W per channel will run them OK??
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Feb 26, 2008 05:36 pm I looked up your system before. I think your better off using the EP2500 as the amp for the mid/highs. Run them in stereo. Take a "Y" adapter to split the signal to each amp channel.
So in this case, your Mid signal coming from the DBX will spilt to both channel one's on each amp. And the highs will both split to channel two.
By doing this, you will not have to rewire the NL4 for your speakers.
mclir9www.witchsmark.comMember
Since: Aug 13, 2006
Feb 26, 2008 10:47 pm Rob do you think the EP2500's 450W per channel will cover the 500W SP2's??
Feb 27, 2008 11:07 am Sure, remember that a 450w amp will exceed that rating. I think that it's a very good match.
Also, the horn will never take that kind of power. Most horns are between 15 - 60 watts max.
mclir9www.witchsmark.comMember
Since: Aug 13, 2006
Feb 27, 2008 12:29 pm [quote]I think your better off using the EP2500 as the amp for the mid/highs. Run them in stereo. Take a "Y" adapter to split the signal to each amp channel.
So in this case, your Mid signal coming from the DBX will spilt to both channel one's on each amp. And the highs will both split to channel two.[/quote]
I'm sorry Rob you lost me on this one. Can you explain it again in Dummy mode?
Feb 27, 2008 04:23 pm OK, ask a simple question.... Here we go.
A "Y" cable is a single female XLR connector with two male XLR's on the other. Inside the female XLR you have two cables that are paired together. So, there are two wires on pins 1, 2, and 3. These then go to two separate male XLR's.
(FYI a split is a "Y" in reverse. one male, two females.)
On all NL4 speakon speakers and amps, pins 1+, and 1-, are always the lower set of frequencies. So, if you have a box with a 1" HF driver, and a 12" or 15" mid, the Mid will always be 1+, and 1-. This is a industry standard.
This means that ch. one of your amp is connected to 1+, and 1-, of the NL4. Ch. two of your amp is connected to 2+, and 2-. So, ch. two input of the amp is going to the HF driver. (Horn, tweeter.)
By putting your amps in stereo, and using a "Y" cable. You go from the DBX. The cable coming from the Mids of the DBX go to the "Y" cable, then to both ch. 1's of each amp. So, both of the EP2500 ch. 1. Then the same for the high's coming from the DBX, to both ch. 2 of each amp.
The top NL4 connector of the amp. (Output 1) Will be the Bi-amp ch. So, by plugging in the NL4 into output 1, you will get both the Mids, and Highs, going to you speaker. All controlled by the DBX in mono.
Feb 27, 2008 04:35 pm One other thing. The reason you can not do this in bridge mode, is when your in bridge, both sides of the amp go to pins 1+, and 1- of the NL4
Bridge mode takes both the 15v+ and the 15v- rails, and forces them to run together on the outputs. Parallel, is both inputs tied together.
