behringer b215a
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Posted on May 18, 2009 07:44 pm
whitey83
johnny walker black
Member Since: May 18, 2009
ive got 4 behringer b215a speakers and one of the horns stopped working is there a fuse that could have gone out. and if so, is it the fuse on the outer body or inside the amp? i opened up the cabinet and both wires are still connected to the horn but no sound comes from that horn. praying for a cheap solution.
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May 18, 2009 10:38 pm It may not be the fuse. But not to worry. You don't have to replace the whole horn if that turns out to be the issue.
They are using an 1.25" Aluminum Compression Driver. The replacement diaphragm are cheap. I don't know the exact price of them, but it should be around $20 to $30 each.
How to check to see if you need to replace them, is to remove the two wires going to the horn it's self. Then with an ohm meter, place the probes on the two contacts of the horn. If you have any ohm load at all, the horn is more then likely OK. If you read nothing. Then the horn is bad, and needs to be replaced.
whitey83johnny walker blackMember
Since: May 18, 2009
May 19, 2009 09:06 am Thanks ill give it a try. I've also heard that by connecting a 9v battery to the horn and listen to a pop would indicate if it is still intact is that true?
May 19, 2009 10:13 am Yes it does. But it is a very bad idea.
Hooking a 9v battery to the horn, will make it slam all the way out. Just like putting 1 hz to it. That can crack the diaphragm.
whitey83johnny walker blackMember
Since: May 18, 2009
May 19, 2009 01:00 pm yeah its blown. now you said i could just replace the diaphragm how do i remove it cause i dont see or feel any screws and ive tried grabbing the magnet and seeing if it unscrewed from the cabinet but no luck. i want to replace it my self, so if you know i would appreciate it a whole lot. thanks a bunch
May 19, 2009 01:14 pm Can you send a picture of it? This way I can see what type it is.
whitey83johnny walker blackMember
Since: May 18, 2009
May 19, 2009 07:53 pm hey ill get you that pic tomorrow i didnt have my camera with me.
I do have another question though. I work at a school and im there comp tv audio tech guy, its a small school. anywho we have rallies every two weeks and i set up my four behringers and i get a terrible ground hum and i know its the ground because if i only have one speaker up and running im hum free but when i connect two or more speakers mono or stereo. mono by piggy backing. hum says hello. im curious to what type of hum remover i need ive heard of 60 cycle hum remover but i dont want to invest in the wrong part. oh and our set up area is pretty much all the same circut i figure bad engineering you know schools lowest bidder. thnaks a bunch this is my new favorite site.
May 19, 2009 08:15 pm Hummmm...... This sounds like an unbalanced cable issue.
Question? What name brand board are you using? And, are you using any adapters to get out of your board to get to your speakers?
Any cable that uses only two conductors, is unbalanced. And anything that is unbalanced is just an antenna looking to pick up all stray signals out there.
The longer you make the cable, by jumping to other speakers, the better the antenna.
whitey83johnny walker blackMember
Since: May 18, 2009
May 19, 2009 08:23 pm using a behringer xenyx 16 channel board ive tried using xlr straight and an xlr to 1/4 and both had hum. are sure it cant be the wiring in the building cause ive used the same cables and set up one speaker in one room and the other in another room and no hum. also i have some giant battery surge protectors and it will take the hum out of one side. weird problem. we even had a team come in for a special event and they brought some b-52 speakers and rack amps and the whole nine yards. plugged it all in worst hum I've ever heard in my life from any system. and they said they use it all the time and never a problem like that has occurred.
May 19, 2009 09:07 pm OK. This gives me a better clue as to what you have going on.
And yes you are correct. You do have a wire issue with that classroom.
The issue is more then likely that there is a missing ground on one of the outlets.
But, that would be a good question. Are all of the speakers plugged into the same outlet?
If they are, then that theory is out the window. But, if they are plugged into different outlets on the same circuit, then one of the outlets is missing a ground.
Stick to the XLR's to run the system. It will keep the whole thing balanced.
And back to the whole ungrounded outlet, the speakers do not draw all that much power. See if you can get a bunch of extension cords to link them all to one outlet. And make sure that the board is on the same.
Make sure that the outlet is a 20 amp circuit. A 15 could trip during power up. Now if you are trying to push a lot of bass, then HPF the speakers to about 80 hz. That will keep the power consumption down.
May 19, 2009 09:11 pm Humm, are you sure that all of the outlets are coming from the same circuit and same breaker box?
Two different ground plains will do the same thing.
whitey83johnny walker blackMember
Since: May 18, 2009
May 19, 2009 09:36 pm Um dont really know if the outlets are on the same circut. We use our cafeteria and it was recently built a year past its due date so that should say something about the construction. but i will ask them to check. yeah i use those battery surge protectors to power up and the side that is connected to the sound board has no hum now that i think about it. And i use a battery surge protector on the other side and i get a hum. hmm ill try to hook up the other side to the same surge protector and maybe that will work. If that works you will have made me look like a GOD at work. i will try that at our next rally in two weeks oh and i havent forgot about the pics. thanks a bunch - john
May 19, 2009 09:47 pm I think that you just answered it.
That really sound like two different breaker boxes. And that means two different ground potentials.
No amount of filters will get rid of a hum like that. And plus, it is very, VERY dangerous!!!!
The neutrals will be out of phase, and all of that potential on the ground could allow a person on the mic to be shocked.
whitey83johnny walker blackMember
Since: May 18, 2009
May 20, 2009 09:08 am i posted some pics on my profile of the speaker and the inside. sorry if the quality is not good i used my iphone. there are four structural poles i guess that support the cone shape but i am unable to find out how to remove them. anything would help.
May 20, 2009 10:45 am Just by what I am seeing in the photos, it is a screw in driver.
I just have never seen that type of compression driver before.
I have a good contact over at loud speakers plus. (Dave) I'll give him a call for you. Get the price and also how to replace it.
whitey83johnny walker blackMember
Since: May 18, 2009
May 24, 2009 10:39 pm Any news on how to remove or prices for the horn?
May 24, 2009 10:42 pm Good timing! I just logged on.
But, sorry. I had a round of graduations to do. So, I haven't had the chance to call yet.
Tuesday I should be able to get a hold of Dave.
May 26, 2009 01:36 pm OK, I talked to Jay over at loudspeakers plus.
He does have that diaphragm in stock. It's $31.89, But that is for the whole driver. Which is very cheap.
Your driver is all one piece. So, you can not just change out the diaphragm. You must change the whole driver.
There should be three screws or bolts under the driver to hold it to the box.
Here is the link to their site.
www.loudspeakersplus.com/...ecific=jsfoomm0
Hope this helps.
whitey83johnny walker blackMember
Since: May 18, 2009
May 26, 2009 09:41 pm yes it does thanks a bunch.
