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Amp-Stage Coupling Experience

Altitude

An ounce of perception, a pound of obscure.
Supporting Member
Mar 9, 2005
11,200
14,095
55
Denver, nee Austin
I had a really bad sonic coupling experience last night. We played at a restaurant/club, and they set up the band on a raised floor area after they clear the seating from that space at about 9:30. Our downbeat is at 10, so we have to get through the setup rapidly, including setting up the bar's PA. Pretty much no soundcheck.

All night long I was hearing this boomy, blooming tone overwhelming my fundamentals. Although I sounded very loud (too loud) in the room, I could not hear any kind of good definition in my playing. Turning up the amp only made matters worse. Today, my right hand fingers are sore from digging in too hard trying to hear what I was doing. It couldn't have been a standing wave from the wall, because the back of the stage was open to the outside - there was no wall behind me at all.

I assumed it was the PA, since it belongs to the club, it's only the second time we've played there, we aren't familiar with it, and it has this monstrous 18" or 20" sub with it. Further, someone had destroyed the PA's two stage monitors, and they sounded so bad we had to turn them off. That made us have to rely on slapback from the back wall as our "monitoring" approach, which contributed to the sloppy stage sound.

Near the end of the night, we ended a tune with one of those long sustained washes on a single chord. At that point I realized how much the floor was vibrating sympathtically with my amp, and the whole problem became clear. Unfortunately it was 1 AM by then and we had only two songs left.

In any case, I will surely put my cabs up on a case or table if we play there again. I post this so that anyone reading it might be able to identify the circumstance more quickly than I did last night and have time to adjust before losing the night.
 
I used milk crates forever. Finally I decided to try gramma out instead. It goes under my cab at every gig now. Best little bit of money I've spent in a while. For raised wooden stages, it is an absolute must for me.
 
crates- my old friends!!!!! Last nite I had the same thing- only did 2 X 1hr & 5min sets, but in that 1st set same deal- It was a Jazz style gig-so I was using my EUB, with LMII amp & GS112 cab- so it was low down-too low, I couldn't hear myself, as well as getting BAD coupling from the hollow floored stage-meant E string was ONLY one I could hear-tho when I put my head down near the cab- ALL WAS COOL! Wore out 3 fingers on my right(plucking) hand in that 1st set!!!!!!!!!!!!! :-( 1st break I went & grabbed a chair & sat the rig on it- all was FINE for next set.
I hadn't used the LMII & GS112 on the floor B4(usually it IS on a crate) so I "chanced it" Dammit!!!! Got 2 more gigs this w/end & NO fingers on my right hand to play with!!!!:-(
Burning my thumb & index finger last week on the soldering iron didn't help at ALL either....... DOPE! :-() So blisters that've popped & are hardeningmade it difficult anyway- ohh t'was a hard gig!
 
I had a really bad sonic coupling experience last night. We played at a restaurant/club, and they set up the band on a raised floor area after they clear the seating from that space at about 9:30. Our downbeat is at 10, so we have to get through the setup rapidly, including setting up the bar's PA. Pretty much no soundcheck.

All night long I was hearing this boomy, blooming tone overwhelming my fundamentals. Although I sounded very loud (too loud) in the room, I could not hear any kind of good definition in my playing. Turning up the amp only made matters worse. Today, my right hand fingers are sore from digging in too hard trying to hear what I was doing. It couldn't have been a standing wave from the wall, because the back of the stage was open to the outside - there was no wall behind me at all.

I assumed it was the PA, since it belongs to the club, it's only the second time we've played there, we aren't familiar with it, and it has this monstrous 18" or 20" sub with it. Further, someone had destroyed the PA's two stage monitors, and they sounded so bad we had to turn them off. That made us have to rely on slapback from the back wall as our "monitoring" approach, which contributed to the sloppy stage sound.

Near the end of the night, we ended a tune with one of those long sustained washes on a single chord. At that point I realized how much the floor was vibrating sympathtically with my amp, and the whole problem became clear. Unfortunately it was 1 AM by then and we had only two songs left.

In any case, I will surely put my cabs up on a case or table if we play there again. I post this so that anyone reading it might be able to identify the circumstance more quickly than I did last night and have time to adjust before losing the night.

What were the dimensions of the room?
 
Add to that & my earlier post re- Last Sat nite in my Big band-8 piece soul/funk etc.. we had a GLASS room- glass on all 3 sides-bar on other. MY -was it a muddy sound for me but I take 3 steps out from my standing pos. near my amp & BANG it all clears up- clear as a bell!!! AS soon as ppl were on the dance floor in front of band -all was OK , but til then it sounded tho we were playing in a roomful of MUD!
 
A few simple tricks I found that helped me sometimes in the same case without spending any money...

Get as far away from your amp as possible. Use the graphic EQ if you have one, and try to get the smallest possible foot print you can. Also, sometimes just leaning it up towards the ceiling can help as well.

The issue is for some people, killing the troubling frequencies kills your tone, and everything else, depending on the stage, is like peeing on a forest fire, sure it does something, but is it enough?
 
Bob, it was probably 25 feet wide by 75 feet long, but one wall of it was mostly open to another similarly sized section of the bar. Plus, the "wall" behind the stage was a garage-door style opening which was open the whole time.

No ceiling?