I have a hasssssssss

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Member Since: Feb 05, 2003

behringer ub2442fx - pro, just got it went down to use it at a gig and i ahev found a big hiss. when i turn the master volume up any where over half and ideas on how to get ride of it or should i take it back......

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Contributor
Since: Dec 30, 2002


Feb 15, 2003 09:47 pm

Hmmm

Let's see - are you getting a large amount of hiss when eveything is plugged in - or is this hiss occuring when NO INPUTS are plugged in?

If this is the case then the desk is almost certainly faulty and needs to go back (unless the PA is faulty)...

If, however, you do have inputs plugged into it, it is quite possible that the noise is being generated from either poor earthing or interferance. Try using balanced cables if possible - if not, then you could easily purchase a Noise Gate / Expander which you would use on the Main Inserts to gate the noise.

jues.

Administrator
Since: Apr 03, 2002


Feb 16, 2003 06:43 am

oh, take it back, I have the 1622 and it rocks, yours is the same thing, just more channels. Just return it if you feel it's faulty and get a good one.

Did the venue have a lot of neon lights or anything like that?

Trying out a piece of gear for the first time at a gig...now that's ballsy! ;-)

Member
Since: Apr 26, 2002


Feb 16, 2003 08:43 am

Speaking of trying something for the first time at a gig...

I figured I'd run my old samson powered mixer as a monitor mixer for the show last night. I thought if I ran 1/4" cables out of the outs on each channel on my main board, and into the ins of the corisponding channels on the monitor board, I'd be able to run a seperate monitor mix. This was not the case though. Instead, when I did this, I cut the input from my main board and sent the signal directly to the monitor board. Why? How should I be setting this up?

Member
Since: Feb 05, 2003


Feb 16, 2003 09:04 am

Its when there is nothing in any of the channles. There wsas alot of strip lighting and air con on.
And trying a peice of gear for the first time at a gig, thats nothing you wanna work with my artist he changes the set constantly through out. all of his stuff is on MD and im constantly looking through disk as well as concentrating on the mix. hes a right little **** at times

Administrator
Since: Apr 03, 2002


Feb 16, 2003 09:12 am

depending on how good their wiring is it could very well have been the lighting or the air cond as well as a faulty board. Before returning it, try it in your practice space and see if you get the humm.

The venue could have lousy grounding or something like that as well.

Chief Cook and Bottle Washer
Member
Since: May 10, 2002


Feb 16, 2003 11:52 am

Lxtec,

I think Db covered it. There are a ton of signal generators out there in a live gig that can create all kinds of stray signal to be picked up and broadcast. I always try out a set up at home and weed out problems there first. Even then, when I get to a gig there will probably be some more, but at least I have a base line "working" system to start from and then I only have to look at environmental differences.

Hero,

I am confused. If I am reading this right (and I might not be have a terrible cold, the gift that keeps giving from my wifes students) You need to take one of the two signal paths and put them to a sub mix to send to the powered board.

Member
Since: Apr 26, 2002


Feb 16, 2003 03:18 pm

How about I draw up a diagram of what I was trying to do in paint and post a link to it tonight?

Chief Cook and Bottle Washer
Member
Since: May 10, 2002


Feb 16, 2003 04:46 pm

That would be very cool! I often wish that we could have pictures to help understand some of this stuff. It is hard for to visulize words alone, always has been.

Member
Since: Feb 05, 2003


Feb 25, 2003 09:50 am

I changed the wires and the room and the hiss is not as big thanx for all of your help

ME

Chief Cook and Bottle Washer
Member
Since: May 10, 2002


Feb 25, 2003 11:00 am

Most any board will induce a "very" little noise if you go beyond mid point on the pots that are controling an amplifier ckt. Just the nature of solid state. Pre amps are the most filtered and have the least effect. Output amps or 2nd stage amps for headphones, speakers, etc. will add a little more. I just mention this, not to confuse the issue, but hopefully qualify "amount" of noise in a board. Headphone amps are probably the most notable per the headphones clarity. But again this inherent noise is very small.

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