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rig-raising?

#4
Most people seem to find that the connection of the cabinet and floor creates an important connection for bass (since most of us want the audience to feel it as well as hear it.)

Is a 2nd cab a possibility? You could either stack the 2nd cab lean it back.
 
#5
Having the speaker up where you can hear it better is a good idea to some extent, but don't do it. On the floor where the speaker is coupled to the ground plane you're getting 3 to 6dB of boundary gain below 120 Hz or so, the equivalent of doubling to quadrupling your power. Not only does that gain diminish as you raise the box higher, you also will get out of phase cancellation reflections at the 1/4 wavelength distance from the lower edge of the speaker to the floor; at 100 Hz that distance is 2.8 feet, and in total you could lose 12dB or more where your 2x10 can least afford to do so.

Instead place the 2x10 vertically, to get the radiating plane as high as possible without breaking the ground plane connection. A bit of tilt to get the box aimed upwards at your ears is OK. This will also help horizontal high frequency dispersion; technically, two or more speakers should never be placed side by side, whether located within one box or multiple boxes. True, everyone does it that way, because intuition says that side by side placement increases horizontal dispersion. However, intuition is wrong 90% of the time when it comes to audio acoustics, and this is one common situation where it's usually done wrong.
 
#7
billfitzmaurice said:
Instead place the 2x10 vertically, to get the radiating plane as high as possible without breaking the ground plane connection. A bit of tilt to get the box aimed upwards at your ears is OK. This will also help horizontal high frequency dispersion; technically, two or more speakers should never be placed side by side, whether located within one box or multiple boxes. True, everyone does it that way, because intuition says that side by side placement increases horizontal dispersion. However, intuition is wrong 90% of the time when it comes to audio acoustics, and this is one common situation where it's usually done wrong.
Click to expand...

I would love to see Stefan Lessard stack his 3 cabs.
 
#9
do a search for the grateful dead wall of sound
phil (the bass player) once had a rig which consisted of 18 1x15 cabinets stacked - on each side of the stage
it doesnt matter how silly it looks, vertical is always better
 
#10
I usually use my evil powers to levitate my cab :D

Get a beat up 4-6 space rack or road case and stuff it with a piece of foam to deaden any vibration.

Or better yet I saw in another post that sombody had a pic of a small beer fridge on top...... reverse it and that would solve two problems!!!
 
#12
billfitzmaurice said:
Having the speaker up where you can hear it better is a good idea to some extent, but don't do it. On the floor where the speaker is coupled to the ground plane you're getting 3 to 6dB of boundary gain below 120 Hz or so, the equivalent of doubling to quadrupling your power. Not only does that gain diminish as you raise the box higher, you also will get out of phase cancellation reflections at the 1/4 wavelength distance from the lower edge of the speaker to the floor; at 100 Hz that distance is 2.8 feet, and in total you could lose 12dB or more where your 2x10 can least afford to do so.

Instead place the 2x10 vertically, to get the radiating plane as high as possible without breaking the ground plane connection. A bit of tilt to get the box aimed upwards at your ears is OK. This will also help horizontal high frequency dispersion; technically, two or more speakers should never be placed side by side, whether located within one box or multiple boxes. True, everyone does it that way, because intuition says that side by side placement increases horizontal dispersion. However, intuition is wrong 90% of the time when it comes to audio acoustics, and this is one common situation where it's usually done wrong.
Click to expand...

Does it mean that you do not recommend the use of the Auralex Gramma pad or things like that? What would you use
to solve unwanted resonnance/vibration problem, especially
on a hollow stage?
 
#14
Does it mean that you do not recommend the use of the Auralex Gramma pad or things like that? What would you use
Click to expand...

By all means you don't want to waste energy vibrating a stage instead of the eardrums in the audience, so vibration absorbing tools are quite useful. One very good item I've seen (it may be an Auralex product) is a pair of high density boards separated by vibration absorbing foam. Smaller ones are good under speakers, larger ones under drum kits.

It'd be 3 slim, but tall AMPEG cabs, all stacked.. It'd look funny, and i'd be afraid to stand in front of them.. Especially with Carter banging away a few feet from him.
Click to expand...

If you must have 3 boxes hang them or scaffold them. The wider the rig is the worse it sounds. Next concert look at the vertical line arrays hung either side of the stage. There's a reason why vertical line arrays are sending cluster arrays to landfills.
But realistically more than a double SVT rig is more for show than for sound anyway- again, look to either side of the stage at the PA subs. They ain't pushing vocals. He might not even have all 3 plugged in; wouldn't be the first guy with extra boxes to impress the equipment nerds.
 
#17
BassDmb18 said:
He still sounds good live. Where ever his output is coming from.
Click to expand...

It wouldn't suprise me if it was all FOH. The cabinets might be dummies just to plactae a sponsor. He's probbly got in-ear monitors and running the bass direct. What does he need stage volume for?

Although this is purely speculation - it is not unheard of, or for that matter uncommon
 
#18
Mike Dimin said:
It wouldn't suprise me if it was all FOH. The cabinets might be dummies just to plactae a sponsor. He's probbly got in-ear monitors and running the bass direct. What does he need stage volume for?

Although this is purely speculation - it is not unheard of, or for that matter uncommon
Click to expand...

They definitly all use IEM (in ear monitors.) You can even download some funny conversations between the boys in the DMB from Kazaa or WinMX from these IEM. Talking about girls boobies, and screwing up words to the song. Or smoking weed, they're pretty funny.
 
#19
t wouldn't suprise me if it was all FOH. The cabinets might be dummies just to plactae a sponsor. He's probbly got in-ear monitors and running the bass direct. What does he need stage volume for?
Click to expand...

Undoubtably he uses both, relying on the in-ear and wedges more to hear everything else in the mix, and the backilne for himself, with possibly some bass in the monitor mix, possibly not. I don't care for bass in monitors and most of the guys I work with don't either, preferring the backine sound. But what you're hearing in the audience is mostly PA, especially anything below 80 Hz where the subs kick in and deliver what the stage amps are incapable of to begin with. That's also where clueless soundmen; ie, the ones that aren't bassplayers, tend to go overboard, putting out far too much bottom and no mids in a mix that seldom bears any resemblance to what the guy on stage is hearing from his rig.
 
#20
the dude said:
Most people seem to find that the connection of the cabinet and floor creates an important connection for bass (since most of us want the audience to feel it as well as hear it.)

Is a 2nd cab a possibility? You could either stack the 2nd cab lean it back.
Click to expand...

I was going to say the same thing, you may find you lose bottom end when lifting/decoupling the cabinet from the floor. :ninja: :eyebrow:
 

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