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Low frequency Feedback source ?

Lumpy_Bass

Lumpy_Bass

Jun 8, 2010
196
11
Hockessin, Delaware
www.instagram.com
#1
I played a benefit gig yesterday that involved me using some one else's rig. It was a Dave Eden (not sure of the model #) through an Ampeg 410 (I think). I was playing my Fender Jazz V through my usual setup (Comp and pre-amp pedal). Not a lot of time for sound checking as we were one of probably 8 bands. Any notes I played on the B or E string created a sort of bass feedback that got worse as the gig went on. I thought maybe my pedals were creating the feed back so i bypassed them but the issue continued. I tried rolling off the bass and other slight adjustments but just couldn't get it to stop. One of the sound people approached the stage and tried turning the cab , which was basically parallel with the kick drum mic. My question is was there anything in particular that I could have done on stage or does this seem like a FOH issue that was not EQ'd properly? I should jnot that the bassists that played before me had no issues that I heard either......

Thanks for any and all input.
 
#2
Was anyone able to tell for certain it was the bass feeding back or was it the drum set causing the feedback?

Was the bass cab mic'd or were you sending a DI to FOH?

99.9% of the time when there is low end feedback I have found it always to be the drum set.
It is usually a clear indicator that the drum heads are not properly tuned.
The notes you were playing on bass were probably causing the drum heads to ring excessively.

If you were using a Mic to send your signal to FOH it could have been mic placement or not properly EQ'd......but my money would still be on it was the drumset!
 
#4
Lumpy_Bass said:
One of the sound people approached the stage and tried turning the cab , which was basically parallel with the kick drum mic.
Click to expand...

Did this solve the problem?

Seems to that If the you and the sound people could not e.q. it out then the bass freqs were interacting with something on stage that none of these would fix.

One time I had a similar problem and it was traced to a vibrating solid base mic stand that had lost it's rubber feet and we were playing on a wooden stage.

Could also be and open mic picking up something. One way to test is to turn off each mic one by one.

Here's a link you may want to check out:
Isolating Head/Cabs from stage/each other
 
#8
Stumbo said:
Did this solve the problem?

Seems to that If the you and the sound people could not e.q. it out then the bass freqs were interacting with something on stage that none of these would fix.

One time I had a similar problem and it was traced to a vibrating solid base mic stand that had lost it's rubber feet and we were playing on a wooden stage.

Could also be and open mic picking up something. One way to test is to turn off each mic one by one.

Here's a link you may want to check out:
Isolating Head/Cabs from stage/each other
Click to expand...

You know they did bring up a another guitar amp to my left for a guy who sat in for one song. After reading your response I am wondering if my bass was being picked up by the mic on his amp. It was pretty close and the bass amp was DI'ed so that seems like a possible source. It would also explain why it wasn't happening to any of the other bass players as the extra amp was only up there for our set. I played the same club 2 weeks ago with the same FOH system and sound man and my sound was awesome with my rig. I appreciate all the responses guys. If nothing else this has helped me through the frustrations of it. I keep thinking that instead of taking my comp and pre-amp out of the mix i should have pulled the DI from the Eden and plugged it into my pre-amp!!
 
#9
Stumbo said:
Did this solve the problem?

Seems to that If the you and the sound people could not e.q. it out then the bass freqs were interacting with something on stage that none of these would fix.

One time I had a similar problem and it was traced to a vibrating solid base mic stand that had lost it's rubber feet and we were playing on a wooden stage.

Could also be and open mic picking up something. One way to test is to turn off each mic one by one.

Here's a link you may want to check out:
Isolating Head/Cabs from stage/each other
Click to expand...

I just finished reading your link / link and actually I always use a homemade version of a gramma. It's just a stack of those lock together rubber fatigue flooring mats I taped all together. I've been using it for about 6 months now and I am pretty sure this is the first gig I've done without it since i started using it.
 
#10
Had a guitar mic onstage with no rubber feet under the steel base. I stomped around onstage until I heard it getting louder and found it that way. Put a folded wet bar towel under it and continued on.
Next time it happens you will know where to look.
 

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