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Trying To Understand Difference Between High/Mid/Low

CPLCPL Posts: 5
edited May 2010 in PA General Discussion
If I set all EQ's, compressors, xovers, etc. identically on the high, mid, and low channel, would it matter which one I plugged a speaker into?

I ask because I am using a 2 x 4 setup with the mains coming from my mixer into the DRPA+ left input and the monitor send going into the right input. For testing purposes I have a single speaker plugged into the high left out and an identical single speaker plugged into the low right out. As far as I can tell I have the same settings on both the high and the low channels. All PEQ's are off and the GEQ is flat. Xovers, comps, and limiters are off, as well. The speaker coming out of the low output (monitor) sounds a bit bassy to me. The speaker from the high output (main) sounds good. Is the difference in the signal from my mixer (Mackie 1202 VLZ Pro) or are the differences in the high/mid/low channels on the DRPA+? Amp is a QSC GX5. Mains going to channel 1 and monitor to channel 2.

Thanks!

Comments

  • GadgetGadget Posts: 4,915
    You haven't given enough info to give you an answer...but I have put together a tutorial on just such a setup...
    viewtopic.php?f=60&t=2228

    This and much more are in the 'Read me first before posting" section. There are a number of threads in the FAQ section that will help and the START HERE thread helps with setup and gain structure.

    To more fully answer your question...
    "If" you set each crossover the same the outputs should sound the same. You will need to verify that the LPF and HPF are set to the same frequencies (the Hi outs on the DRPA have no LPF however but allow whatever comes in to pass) you will need to press the crossover button and toggle through each H,M,L to see what those are but I suspect that you probably chose a preset? and are working with it? Even if you went through the wizard you are going to be set up with some sort of default hi/mid low setup, or in the case of the 2X4 setup the hi, and low outs would be set up as filters that send HPF and up through the hi outs, and LPF and HPF to the low outs usually like 100hz and up to the hi outs and 100hz and down to the low outs... You would need to use a 2x6 setup if you want to use all 6 outputs.

    Gadget
  • CPLCPL Posts: 5
    Thank you. I had used your tutorial to start with and I didn't get separate left and right EQs. Is this maybe because the preset I was on when I invoked the setup wizard was set for linked left and right EQ, or was it user error on my part?

    When I tested last night I started off with one of the 2x4 presets that had the GEQ setup as separate for right and left so I could do separate EQs for mains and monitors. I then backed out of the EQ and xovers so they were turned off when I was testing this.

    In any case, I started over today and now the monitor channel sounds OK. I'm pretty certain I had all EQ and xover disabled so there should have been no EQ or LPF or HPF when it didn't sound right so I am not sure what is different, but at least I have a good starting point now.

    One more question if I could - I do now have the LPF and HPF set on the low channel (monitors) as you described in the tutorial (60hz BW18 to 12.5khz BW6) . I have xover turned off on the high channel, which is where I will have my mains daisy-chained. I don't have any subs, just a pair of Yamaha S115V speakers with internal crossover. Should I do anything with the xover on the high channel?
  • GadgetGadget Posts: 4,915
    Should I do anything with the xover on the high channel?
    Yes you should set a HPF to protect the woofer. I'd use 55hz BW18

    As for the other part you need to make sure that when you run the wizard that you answer stereo, and then dual mono for this to work.. that way you'll get separate auto eq passes...

    G
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