Using QU-16 as crossover between tops and subs

[Keith]

Hi I’m considering adding subs to my pa speaker rig and am wondering if using the mono outs to drive the subs and use the GEQ’s to determine the crossover frequency?

Thanks

Keith

[GCumbee]

Don’t use a GEQ as that is not a bandpass filter. I would use a PEQ and set the HF to a roll off filter (not peak/dip) then run the roll off back to the desired freq. Usually 80-110 or so. I do 90. I have not tried that on a GLD and have not gotten my QU yet. So not sure if HF on a PEQ will go back that far. Problem with using a GEQ is that you want ALL that above the cutoff to go away at some db per octave. With a GEQ there are still spike of sideband from the individual freqs.

[GCumbee]

Just checked it on my GLD. That will work. Set the PEQ for low pass or hi cut filter. Right side bottom icon. Then use right knob on PEQ on board to sweep back to where you want. I am assuming here that the QU has the same ability to do this…

[Anonymous]

The main outs and mixes 1-4 only have GEQ. The “stereo” mix feeds do have PEQ. You can set it up like GCumbee said. (icons are different) Don’t know what the slope is though.

[Leon BigEars A&H]

The shelving filters are 12dB/octave

[GCumbee]

Would you not want to do this on an AUX feedd and just put in that mix what you want?, kick, bass, other LF content instruments. Then put the LF pass filter on that output feed. That is IF the QU has PEQ on Auxes. I have not gotten mine yet.

[Anonymous]

CGumbee, the Qu has PEQ on the stereo auxes only (5-6, 7-8, 9-10), the first four mono auxes have GEQ only, if I remember correctly.

AdamS

[GCumbee]

That would be what you want anyway. Aux fed subs. Just put into them what is needed…

[SteffenR]

PEQ on Qu has no hi cut setting, only bell and shelf

the real solution for that would be the possibility the define low and high band as a low pass and high pass filters.

That would help for other things as well.

[Author]

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