ProSoundWeb Community

Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => LAB Lounge => Topic started by: Joseph D. Macry on August 03, 2014, 08:01:15 pm

Title: Replace the whole woofer?
Post by: Joseph D. Macry on August 03, 2014, 08:01:15 pm
Cheap little Behringer speakers, model B212XL. One of the pair sounds distorted. Pulled them front grill, I can hear the woofer rubbing when I push on the cone. Presumably the coil rubbing in the gap; can't see any other place that might be rubbing. Is there any alternative to simply replacing the whole woofer assembly? (model 12W200E8 printed on the driver label) Probably not expensive part, but perhaps worth asking.
Title: Re: Replace the whole woofer?
Post by: Ivan Beaver on August 03, 2014, 08:07:43 pm
Cheap little Behringer speakers, model B212XL. One of the pair sounds distorted. Pulled them front grill, I can hear the woofer rubbing when I push on the cone. Presumably the coil rubbing in the gap; can't see any other place that might be rubbing. Is there any alternative to simply replacing the whole woofer assembly? (model 12W200E8 printed on the driver label) Probably not expensive part, but perhaps worth asking.
It might could be reconed-but I bet it would be cheaper to just buy a new one.

It might could be as simple as a wire touching the back of the cone.  I would take it out of the cabinet to get a better look
Title: Re: Replace the whole woofer?
Post by: Joseph D. Macry on August 03, 2014, 09:08:09 pm
It might could be reconed-but I bet it would be cheaper to just buy a new one.

It might could be as simple as a wire touching the back of the cone.  I would take it out of the cabinet to get a better look

Been there, done that. Nothing apparent rubbing behind the cone. Pretty certain this is the coil rubbing. I note that I hear the noise when I push one particular quadrant of the cone.
Title: Re: Replace the whole woofer?
Post by: Tim McCulloch on August 03, 2014, 11:11:26 pm
Been there, done that. Nothing apparent rubbing behind the cone. Pretty certain this is the coil rubbing. I note that I hear the noise when I push one particular quadrant of the cone.

That might be a loose spider, and repairable without reconing.
Title: Re: Replace the whole woofer?
Post by: duane massey on August 04, 2014, 09:53:37 am
Considering the product, a replacement Eminence would probably be cheaper than a recone. Obviously the potential for a change in performance may happen (better or worse), but my experience with Behringer speakers would lean towards "better".
Title: Re: Replace the whole woofer?
Post by: George Dougherty on August 04, 2014, 12:01:47 pm
Considering the product, a replacement Eminence would probably be cheaper than a recone. Obviously the potential for a change in performance may happen (better or worse), but my experience with Behringer speakers would lean towards "better".

Being that it's a plastic cabinet, a straight driver swap could be problematic as it's very possible the bolt positions are not a direct match. The driver could be pulled and measured but I don't think I'd bother with replacement in one of these. The HF performance often is the limiting factor on overall performance and without replacing it and reworking the crossover you may only make a slight gain in sound quality and woofer durability.  Given its Behringer, the crossover may not take much more than the cab is rated for anyway.

There's only so much that can be done with a unit that costs $150 new...
Title: Re: Replace the whole woofer?
Post by: Tim McCulloch on August 04, 2014, 12:04:44 pm
Being that it's a plastic cabinet, a straight driver swap could be problematic as it's very possible the bolt positions are not a direct match. The driver could be pulled and measured but I don't think I'd bother with replacement in one of these. The HF performance often is the limiting factor on overall performance and without replacing it and reworking the crossover you may only make a slight gain in sound quality and woofer durability.  Given its Behringer, the crossover may not take much more than the cab is rated for anyway.

There's only so much that can be done with a unit that costs $150 new...

It's also possible that the plastic box/facia IS the woofer basket, molded as one piece.  I've not been inside one of these units so I'm speculating, but I've seen this kind of construction across multiple entry level brands.
Title: Re: Replace the whole woofer?
Post by: Paul G. OBrien on August 04, 2014, 12:08:21 pm
Is there any alternative to simply replacing the whole woofer assembly? (model 12W200E8 printed on the driver label) Probably not expensive part, but perhaps worth asking.
There is not as far as I know, I have looked and have never been able to find recone kits for any of these Behringer drivers. My local dealer says the replacements aren't expensive though.. about $60.
In a pinch I have also substituted an Eminence Delta12LF for a 12w300A8 that somehow suffered a torn cone and it sounded and performed identical, this was in the B512DSP cabinet that is an SRM450 look alike.
Title: Re: Replace the whole woofer?
Post by: Brian Jojade on August 04, 2014, 05:56:53 pm
There is not as far as I know, I have looked and have never been able to find recone kits for any of these Behringer drivers. My local dealer says the replacements aren't expensive though.. about $60.
In a pinch I have also substituted an Eminence Delta12LF for a 12w300A8 that somehow suffered a torn cone and it sounded and performed identical, this was in the B512DSP cabinet that is an SRM450 look alike.

If the replacement driver costs $60, you're not saving yourself too much doing the repair on your own vs just replacing the box once you factor in the labor.  Heck, even with a blown driver, you could probably get a few bucks for the broken one and you're even further out ahead.
Title: Re: Replace the whole woofer?
Post by: Joseph D. Macry on August 05, 2014, 04:30:57 pm
Getting the runaround trying to replace the woofer.
One Behringer distributor says he won't carry speaker parts.
Another distributor says to call Behringer direct at this phone number, they'll give me the same price as they'd give him.
They guy at the phone number says I need to call somebody in California.
The guy in California doesn't answer the phone.
I just want a fucking replacement driver.
Title: Re: Replace the whole woofer?
Post by: Art Welter on August 05, 2014, 04:47:58 pm
I note that I hear the noise when I push one particular quadrant of the cone.
I just want a fucking replacement driver.
I feel your pain.
Since you hear the noise when one particular quadrant of the cone is pushed, it is possible the frame has bent, if the driver uses a stamped steel frame, twisting one of the spokes may cure it. Aluminum spokes tend to break rather than bend.

Set a sine wave to the frequency that makes it buzz the worst, then twist with a big wrench or channel locks.

Have fun, good luck.
Title: Re: Replace the whole woofer?
Post by: George Dougherty on August 05, 2014, 04:59:01 pm
It's also possible that the plastic box/facia IS the woofer basket, molded as one piece.  I've not been inside one of these units so I'm speculating, but I've seen this kind of construction across multiple entry level brands.

A plastic basket?  No wonder some sound so crappy.
Title: Re: Replace the whole woofer?
Post by: Joseph D. Macry on August 07, 2014, 09:44:57 am
A plastic basket?  No wonder some sound so crappy.

The basket is stamped frame. Does not appear bent.
I have a new woofer on order. $62 and change.
Title: Re: Replace the whole woofer?
Post by: Art Welter on August 07, 2014, 01:05:23 pm
The basket is stamped frame. Does not appear bent.
It only takes a bend of a millimeter or two to make a voice coil drag, pretty hard to see. For $62, you probably don't want to spend much time on a fix, but there is a good possibility bending one of the spokes would cure the problem, and leave you with a spare.