Hello yall!
I am trying to find a work around for running A sub from the SQ6 that will obey the main fader but not be affected by the main fader EQ. I am using onboard graphic EQ to create HP and LP filters for the mains and sub. I have tried using the matrix. But it uses the eq from the mains and pulls out the lows. I tried using an AUX send but it does not obey the master fader. Is there something else I can do?
First of all you would be better off using the parametric EQ to create the HP and LP, opening up the filter width wide open puts the filter in shelf modeâŚâŚ.keep in mind that is not a true HP or LP filter cut off. For true processing you need to use a an external DSP.
For aux subs when you the sub level to track level changes made with the main fader assign the aux master and the main fade to a DCA, set the balance between the subs and mains then use the DCA to control the over level.
I appreciate the reply. The level of competency that I am working with in the volunteers, they would definitely not be able to remember to use the DCAâs . The bigger issue is that we are using the facility with 2 other churches. So, I was hoping for something simple that would not change something as basic as using the LR fader to control all sound.
I am kind of bummed that this board does not have the capacity to run a main sub separately from the LR. 
Iâll keep diggingâŚ
The SQ can certainly run aux subs independent of the main LR mix. The SQ does not have crossover filters for speaker processing, personally I think all speaker processing should be outside/independent of the mixer anyway.
You maybe best to just take the main LR outs to the speaker processing and run a full range mix.
What is your speaker system?
Is you system already set up to do actual aux fed subs with independent feeds to the subwoofer processing and amps and independent feeds to the mains?
Honestly they are a mismatch of speakers. I would have to look again. They do not have a DSP or crossover switch on them. The Sub nor the mains. My guess is that they are cheap. They were there when we moved in they use EVâs for monitors.
Full range sound bad in this facility. A bit too muddy. Separating them using the aux feed and implementing onboard crossovers has improved the sound. It just is weird to turn down the mains and the sub just stays where it is using the aux solution.
What you need is to âgangâ the Master fader to your subwoofer AUX fader. That way your volunteers can mix as usual and you donât need to âburnâ a DCA.
Unfortunately this feature isnât available on outputs, only inputs - but it is one I have asked A&H to implement. Please search for my post doing so and upvote for it!
It sounds like you just want to simulate a kind of speaker management.
To do this, you would need to send your main mix to 2 matrices: one for your main speakers and the other for the subwoofers.
Remove the filtering from your current main mix channel and move it to the main matrix.
Then filter the subwoofer matrix according to your subwoofer requirements.
This way, your less experienced users could use the main fader as usual.
If you want to do true aux subs and have a common level control you will need to use a DCA.
Are you speakers powered or passive with power amps located in a rack somewhere with the DSP?
In all fairness it may be worth it to have someone take look over of your system and go through it. The sound quality maybe helped with just a system tune up.
Keep in mind to do true aux subs you need an independent signal path to the sub woofers, their amps and processing.
Put the Subs on a post fade AUX, route only what is necessary to the Subs, and configure a fader layer so that the sub aux master fader is next to the main L/R fader. You can configure the Main L/R fader so that it appears on a layer, not just on the dedicated fader.
This provides the most flexibility, and you can adjust both faders at the same time with two fingers of one hand. You can also use this configuration to adjust them individually.
If you want to use the DCA method, you can add the DCA fader to a layer.
The desk operator then will not know they are using a DCA - it is just another fader. However documentation, training, and understanding of which controls do what and why is still a must.
Dave
So, I did something that is seemingly working. Although I will look into SQuserâs solution further. That might be a better solution.
What I ended up doing was keeping the EQ filter on the main LR, feeding it into the Sub Matrix. For the Sub Matrix I cut out all the low to High frequency and boosted all of the Low frequencies that I cut from the LR filter and it was like it brought it back to unity for the low end.
For now this solved my issue.
Sub sounding nice, Mains sounding clean and clear.
Every ânormalâ EQ not only changes the frequency, but unfortunately also the phase of the signal as a side effect, which in turn can lead to unwanted and unpredictable changes in sound, especially in the low-frequency range.
Therefore, you should definitely avoid (unnecessarily) attenuating a frequency only to have to (extremely) boost it again in the following module.
Furthermore, you have better sound control if you donât use these EQs in series, but rather, as recommended, in parallel.
I really appreciate the feedback.
I will definitely test out what you suggested. So, far it all sounds great! Does not appear to be out of Phase.
Its a bummer that Allen and Heath did not give us a better solution for onboard crossovers like the X32.
You can use an aux for the subs, then assign a DCA to control both the LR and sub masters.
Such phase issues in the low bass range might also go unnoticed if they essentially only result in a gap in the frequency response.
But if everything seems perfect as it is, thatâs fine too, of course.
Ok let me say itâŚwhat your doing just is so wrong in many different ways for what I / we think you were wanting to do. I think most of us though you were trying to set the mixer up for aux fed subs, clearly not what your doing.
I think your entire system configuration needs going though by someone.
Now I have to defend him a bit. 
From my perspective, he did absolutely nothing wrong.
He made it clear that, given the staffâs âlevel of competencyâ, operation should remain as simple as before.
Therefore, quite obviously, lacking DSPs or other loudspeaker management, he only wanted to implement a simple âcrossoverâ inside the console, which isnât a bad idea in principle.
Of course, it wouldnât hurt to have the system calibrated and configured by professionals.
But that would be the same if a separate aux mix were used.
Ok Iâll give him a little leeway.
We still donât know if the system is powered speakers or passive, what if any outboard processing is in place.from
If powered speakers mostâish have some way to do crossover functions from one main cabinet to a sub or the other way around.
If itâs a passive system depending on the amps running it the processing could be set up in the amps or at the very least using an analog crossover would be better than the wild EQâing that does not give you true cut off filters.
I believe all system processing should be outside the mixer, even just simple crossover functions.
But he did write this:
From my point of view, thatâs pretty clear, and it would be the same whether these speakers are operated with an internal or external power amplifier.
Yes, no, maybe.
What model speakers, what model amps if there are amps.