Lowpass filter steepness | LR separate channels delay on SQ5

[amargasinski]

Hello,
new to the forum. I am using sq5 since not so long ago, and I am becoming bit frustrated because of the gentle steepness of the lowpass filter on sq5 in the application of sending signal to the subwoofer lines. Am I missing something? I can see I can change highpass filter type, but cannot see the option for lowpass types, which seems to be even more important when we set the whole PA system without external processor. Is this the limitation of this mixing desk? (which would be a pity because even x32’s have many filters to choose from.

Also, does anybody know what would be the simplest way to adress the delay of only one of two LR channels, and possibly even for checking polarity? Is it possible to to this on LR bus without some crazy routing over the matrixes or busses?

Thank you for your help and please forgive if any of those questions were answered before

[Adethefade]

Hi. I suppose one could characterise these features (or lack of) as a limitation of the console, in that other consoles might provide them, but all the attributes you’re referring to are functions of an active electronic crossover (a system processor), not a mixing console. I’ve seen systems set up in this way but it’s always a compromise and not a long-term solution.

[amargasinski]

Thank you for your answer.
Yes, I understand this functions are more of a system processor’s role, but on the other hand it doesn’t seem that it would be hard to incorporate them from technical point of view, especially lowpass filter type. In my work, not all situations are in perfect conditions and many times I need to work only with mixing desk and use it to tune PA system. So this seems to be rather a A&H policy, but it is a shame that in many cases I actually prefer to use older design of x32 to SQ5 because of too gentle lowpass filter. As I understand, higher series of mixing desks have that function, which seem like intentional decision from the company, and if this is the case it simply makes me want to invest my money somewhere else next time.

[SQuser]

> … but on the other hand it doesn’t seem that it would be hard to incorporate them from technical point of view, especially lowpass filter type.
One problem could be that there is no dedicated knob for an LPF like there is for the HPF.

> As I understand, higher series of mixing desks have that function, which seem like intentional decision from the company …
So Avantis does have a dedicated LPF, but also without the ability to change the slope.
And probably i see the same in the dLive manual.

> … and if this is the case it simply makes me want to invest my money somewhere else next time.
If this one feature is that important to you …

You could still try sending the subwoofer mix through a matrix and setting the LPF from the PEQ at the same frequency in both paths – Aux and Matrix.
This would (at least theoretically) give you a slope of 24 dB – with all the advantages and disadvantages, right?

[amargasinski]

Yes, you are right with the idea of doubling the slopes via matrix, thank you! Not a perfect solution but it surely can be effectively done.

Maybe I need to change my philosophy about PA processing then, although, it’s still a pity as a cheap x32 has this option.

Thanks for your help

[SQuser]

Gladly. 🙂

But one more addition:
> does anybody know what would be the simplest way to adress the delay of only one of two LR channels, and possibly even for checking polarity? Is it possible to to this on LR bus without some crazy routing over the matrixes or busses?

In my opinion, these things are not possible with the L/R bus alone.
For the delay you can use a matrix, but without crazy routing:
If you send Main-L out to L-out as usual, but route Main-R to R-out via a matrix, you can increase the delay separately in the matrix.
However, the polarity would requires a very crazy routing but maybe even better in an emergency than heating up the soldering iron.

If I’m not mistaken, both things are already on the wish list.

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