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PA Advice


redbandit599
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Hi all

Just after a bit of steer. Hoping to be back gigging in earnest in the Spring and with our new singer the band is sounding great (well, by our standards anyway :) ) We are a 5 piece hard rock/classic metal band.

Anyhow, we've always had a very simple approach to PA. We have a powered Peavey mixer (250w per side I think) and two Peavey 15" top cabs - we usually just run vocals in here and rely on backline for everything else. Sometimes put the kick in but this seems to be all 'crack' and not much thud.

We run two monitors (soon to be three) two powered and one slave - the mixer amp just has one output for these so it's the same mix in all. We use a TC Helicon Voicelive to add some nice delays etc for the singer.

That's it.

Anyhow, don't really want to have to swap out what we have but am interested in any ideas as to how we could maybe add in a sub (preferably just one) to give a bit of re-inforcement for the kick and clean it out of the way of the vocals.

Just can't quite work out in my head what we'd need- I think a hybrid passive PA and powered sub set up would be the most likely end result, just not quite sure how I'd link it all up!

Any help or direction to good resource appreciated.

Cheers

J

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what model mixer is it? what outputs does it have? you should be able to do what you want with a crossover to send the low freq stuff to your sub or if you've some other (i.e sub - not sub speaker - sub channel :) )outputs just use one of those for the signal to the sub..

There's a lot of subs in that explanation - I feel like a U boat commander :) hopefully it makes sense tho!

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The correct solution would be to upgrade your desk.... However... If you just want it for kick and want to keep expenditure low, put the kick mic into a little mixer and just put the kick drum into that.

Output from the mini desk to powered sub. Probably would be good to put a DI in there bass too if you want to take advantage of extended lows.

Edited by EBS_freak
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Thanks chaps. The mixer amp isn't quite as powerful as I first thought. It's a Peavey XRD680s, so 150w x 2.

Definitely will try the eq'ing first with existing set up. Turns out that one of the guitarists (and failed studio guru) has an AKG Kick Drum mic that we've never used (having just chucked any old thing in before.) That may help us too I'm sure.

Thanks for the 'little mixer' idea should a sub ultimately be required, makes sense.

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A 'kick' in the vocal PA is useful for 'spreading' the drums a little, integrating them into the overall sound. We often do this, usually with a single overhead, too. The secret is in the 'a little' part. Unless you're trying to mic up the kit, I'd suggest that a sub is overkill for the job. EQ on the kick channel should give just enough 'presence' in the PA to be balanced with the rest. You won't get an authentic 'kick in the chest' from that, just enough to blend the drums into the venue. Less is more.
Micing up to include the bass [i]et al[/i] is, however, a very different affair. I doubt that the 2 x 150 would suffice for that.

Edited by Dad3353
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With that set up you are not making it easy on yourselves.
With it being a mixer amp, you will need a separate output to send to an active sub, maybe an aux or fx send if you have one free.
Turn the kick up till you can hear it in the tops, and then turn the aux up on that channel till you can hear it in the sub.
If your sub is the type with a crossover built in, you you can set the point at about 100Hz (QTX do cheap 15"ones, I just won one on ebay for £40 and it's fine for a little warmth in a small venue.) Mix and tweak until happy.
You can apply this to any channel.
The problem with this method is it doesn't prevent the sub frequencies going to your tops, just adds a bit of sub to your existing sound,so you need to be careful with the EQ

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If it were me, which it isn't, I'd be thinking that a rock/ metal band could do with a little more than 125w per side. Sadly that means changing mixer and then beyond that budget / transport / storage etc are all going to be factors.

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ah back in the day I remember 100watts H&H was plenty for a pub. It was years before I saw the H&H 'slave' thingy.
I think it depends how much air you want to move is it. Things can be loud, or should I say the volume, enough to hurt most peoples ears. It's just the way it's put across. I think for the OP purposes of vox only, 150 per side would be good enough for most small gig/pubs. Saying that, it's nice to get a good thud going as well.

Disclaimer:
I know pretty much nothing about PA's or sound engineering.

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Yep, I think our PA is a 'back in the day' one ;) That said we, do run a 4x12 for each of the guitars and my EBS with 2x10 and 2x12 so shift plenty of air for most pubs via the backline.PA is just for vocals really, and hopefully some kick.

Ideally we'd start from scratch again, but as we are just getting back out and about we'll try and make what we have work for a while before substantial investment!

Old watts are definitely louder, my old Ampeg 4x10 Combo is 'only' 140w (solid state), still shook plenty of windows! Though I do understand the point of headroom etc. etc.

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The limiting factor with what you have is the power available. The PV 15's will easily handle the kick, especially if the 15's have the Black Widow drivers but you will run out of power before the speakers run out of excursion.

You could fiddle around with the eq, filter off the power hungry low bass from the kick and boost the 80-150Hz range to give a good thump, then roll off the top end to lose a bit of the slap. The other thing to look at is the mic placement, move it around and you'll be surprised how the sound changes, just shoving it anywhere in front of the kick isn't good enough really if you want a decent tone.

Old PV speakers aren't particularly good for vocals either. They are fantastically reliable, esp for the money but the horn drivers just don't cut it for vocals IMO. I'd look to change up the whole system at some point rather than spending on something which does a job but ultimately needs upgrading completely if you want a better sound.

Homework for you

https://www.youtube.com/watch?v=uyQhWj2xuB0
https://www.youtube.com/watch?v=jOHduVBqGeM
https://www.youtube.com/watch?v=crp0yx24io4

Edited by Phil Starr
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