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Aux fed subs issue - HELP!
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PhilG
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why not use a subgroup out to feed the subs?

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basiklydeke
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Joined: 14/10/2010 23:54:25
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My question would have to be.....why are you bringing down the main fader? Why not just bring down the fader(s) that are controlling the iPod? Problem solved.
scottmckenna
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CHIP ROBERTS wrote:OK, last night I tried to aux feed my subs. I have a Presonus StudioLive 24.4.2. I came out of the MONO out and into the input (channel 1) of the ITech4000 that powers my tops. Then I came out of aux 10 and into the input (channel 1) of the ITech 8000 that powers the subs. The inputs were Y'd on both amps. There's no Driverack in the mix of things. The crossovers are set in the amps.

So, I played a track (channels 20 and 21) from an Ipod. I raised those channel's faders a little past half way. With aux 10's master at "unity" AND SET TO "POST", I pushed aux 10's "MIX" button and turned up channel 20 and 21 to the center position in aux 10. I then heard the low end being added to the main mix. Everything seemed to be working as it should!

But when I turned the main fader down all the way the low end remained! I thought that as long as I had the aux 10 master set to "POST" it would follow the main fader? You know, the same as if I were using aux 10 for reverb or something. So I set things back up the way I'd been running the rig before because I didn't want to do the show that way untill I found out what was going on.

If I wanna turn the main fader up or down, I want the low end (the aux fed subs) to go right along with it. I never tried to aux feed my subs on my analog console (the 'ol trusty Mackie SR24-4!), but it would seem that if I used aux 6 (which is fixed POST) to feed the subs, it would follow the main fader?

"Hey, you guys are too loud! Can you turn it down a bit?" Does this mean I will have to turn down the main fader AND the aux 10 master? Is this normally how aux fed subs work? What am I missing here?

Thanks!


This doesn't seem to make sense to me. I aux feed my subs out of my 16.4.2. I run the sub out of aux 6 and I switch it to post. Everything works exactly as it should. When I bring the fader down for a channel that is running to the sub, it turns down in the sub as well. I'm not sure why yours is not doing the same thing. I'm a bit confused. When I bring the master down, it all goes with. Hmmm....
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scottmckenna
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basiklydeke wrote:My question would have to be.....why are you bringing down the main fader? Why not just bring down the fader(s) that are controlling the iPod? Problem solved.


I agree with this also. I don't know when I've ever done an entire fade out with the mains. I've faded out channels but not the master. This seems to be an easy fix to what your saying is wrong.
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Scott McKenna
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CHIP ROBERTS
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Joined: 09/08/2011 07:20:38
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PhilG wrote:why not use a subgroup out to feed the subs?


I'll probably try this tonight.
CHIP ROBERTS
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basiklydeke wrote:My question would have to be.....

why are you bringing down the main fader?

I would want to bring down the main fader if I wanna bring the entire band/live mix down.



Why not just bring down the fader(s) that are controlling the iPod? Problem solved.


The issue isn't the volume of the iPod, it's the volume of the whole mix. It's not a big deal to bring the main fader AND aux 10's (the aux fed subs aux) master at the same time. I just wanted to know if there was a way I could bring down the whole mix (including the level of the aux fed subs) with JUST the main fader.
Monolithent
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Unfortunately no. Your best bet would be to route your aux to sub 4 and then grab the mains and the subgroup four when you need to turn them down. Since they're right nest to each other.
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CHIP ROBERTS
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Monolithent wrote:Unfortunately no. Your best bet would be to route your aux to sub 4 and then grab the mains and the subgroup four when you need to turn them down. Since they're right nest to each other.



You can't route auxes 1 through 10 to a sub group. If you push "SELECT" on any of auxes 1 through 10, you'll have access to all the "Fat Channel" settings but the 5 buttons below (SUB 1, SUB 2, SUB 3, SUB 4, MAIN) will not light up. You can't choose those when you push "SELECT" on auxes 1 through 10.

Hey, thanks for your help though. I really appreciate the response! I'm just tryin' to learn what I can.
Monolithent
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Weird, I swore it did. I don't route like that often due to controllers.

Sorry for steering you wrong.
http://support.presonus.com

Tallest guy in the Mod Squad with all his hair still on his head.

No I'm not a freaking pilot!! The Air Force won't let me have a suit with a zipper...or sometimes shoestrings.

My advice and suggestions should never be considered advice or suggestions. These are mostly insane ramblings of a poor aircraft mechanic who can, strangely enough, still hear.

StudioLive 16.4.2, AudioBox 1818VSL, AudioBox 44VSL, Faderport, Digimax FS,, M-Audio Firewire 410
--MultiBoot System--
Win Vista 64/XP Pro/7 x86/7 x64 - Mac OSX Snow Leopard/Lion
Gigabyte motherboard--SYBA TI Firewire XIO2200A--i7 2600k Quad Core--16 GB DDR III--Custom 2U Rackmount--4 TB Raid (all internal SATA II)--19" Samsung HDMI LCD on pivoting VESA 1U Mount
Studio One v1 Pro x64
Studio One v1 Artist
Studio One v2 Artist
[Yahoo!]
scottmckenna
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CHIP ROBERTS wrote:
PhilG wrote:why not use a subgroup out to feed the subs?


I'll probably try this tonight.


I personally wouldn't suggest this method at all. Running the subs from a subgroup just doesn't make much sense. You lose complete control over the ability to decide how much of a certain channel you want in the sub, etc. You also can't run this POST, so you'll have even more volume issues. Stick with the AUX, put it in post, and just don't drag the MAIN. If you're fading out music and don't want the sub to continue, just drag the fader/faders for the iPod, and it will all fade out together.
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Scott McKenna
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henryklein
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Joined: 29/07/2010 09:54:51
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just my 2 cent (and maybe it's already said).

Why trying to make an uncommon setup/routing instead of investing 100 bucks in an active crossover? I guess the "cheapest" Behringer" crossover (or any other maybe used item shot at ebay) will make a better job in seperating Highs and Lows than the in-the-presonus-box solution.

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TimmyP1955
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A crossover would just add unnecessary stuff in the signal chain - he's using the DSP in his iTechs - it don't get better than that (unless one can afford a Lake).
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Presonoid
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Running FOH in mono gives you another option:

Use sub3 for subs and sub4 for tops, assign both to main (sub3 hard left, sub4 hard right), use main left as subs out and main right as tops out, and forget about the MONO output. This setup gives subs-tops balance control through the sub faders, general level setting through the main fader, and separate GEQ control through GEQs 7 and 8 (this time it's an advantage that they're not linked). Don't use the fat channel on main but use the fat channel on subs 3 and 4 instead.

With this setup don't forget to assign your channels/effects to subs 3 and/or 4 and not to main.

This message was edited 2 times. Last update was at 02/11/2011 12:26:18

robare99
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Joined: 16/05/2011 18:25:55
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I second the crossover idea. Let the crossover do its job.

I've never understood the big deal with Aux fed subs. Set your HPF and then the signal never makes it to the subs, unless you want it to...
gary phillips
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Joined: 03/11/2011 16:48:05
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Try this when you have a few spare minutes:
Set your system up and turn on only the sub amp(s). Engage the HPF on the vocal mic channels and bring the vocal mics up to normal levels, also the main outs of the console. Have someone talk into one of the vocal mics and notice how much sound comes from just the subs - even though the HPF is on.

A 6dB/oct HPF is not nearly steep enough to be effective. So if you want the subs cleaned up then aux-fed subs are a potential solution.

gp
 
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