Speaker Sub setup

[KSmith]

We’ve just had an AV company contracted in to install our new hall. We have 2 wall mounted speakers and floor level subs. The way they have wired it to the control room and into our QU24, our bass control for the subs is on it’s own fader and can be muted or volume up adds more bass then the speakers are on a different fader. Is this normal? Every setup I’ve worked at (including my old hall) the speakers plug into the subs, then subs into the desk which means their both on one fader and bass can be altered in the EQ.

Edited November 9 by KSmith

[chelgrian]

I would always install a correctly balanced system where the PA is setup such when it is fed a stereo signal with no EQ set you get an approximately flat response.

However I’ve seen a lot of people install what they would use with direct control over different parts of the PA from the desk forgetting that the people using the system are not them.

It should not be difficult to either require the AV company to change it or to change it yourself.

[themadhippy]

some say being able to control what goes to the sub instead of everything results in a better sound,if you send everything, a little bit regardless how steep  your crossover slope ,is going to seep through

[kerry davies]

Can any resident humheads put me right here but it sounds as if they have wired it for a DSP unit then conveniently saved cash by not fitting one? The OP writes about a signal going to the sub bass unit then on from there to the Mid-highs which sounds like the active systems with DSP built into the sub units.

The answer is to ask the installers what was in their minds with this set-up. We can only guess.

[GR1]

I prefer to have the subs on their own fader so I get more control depending on the audio source and I usually set the system up that way given the choice.

There is no reason why a DSP is missing. If the wall mounted speakers operate with their own processor or no processor if that is their spec and the subs operate with a crossover/ high frequency filter then there is no problem.

As with most things the devil is in the detail and we don't have enough of that.

Depending on how the system performs nothing about this worries me.

[J Pearce]

On a Qu24 I’d probably set the subs up as a matrix output, so that you can easily run a L/R show or you can do separate sub routing if desired.

[sunray]

I like subs to be on a seperate fader, that way there is control over the sound, particularly reduce the sub level for speaking parts - like a comedian within a mixed program.

 

And no, turning the LF EQ down does not do the same thing.

Edited November 10 by sunray