I recently got a Dynaudio BX30 studio subwoofer, however it was making a horrendous popping sound on heavy bass notes. I took it apart and found that the spider is torn (about 180degrees is detached now).
Attached are pics.
What kind of glue could I use to repair this? is it even worth it?
Attached are pics.
What kind of glue could I use to repair this? is it even worth it?
Google 'speaker repair service' they are usually very reasonable. I use http://www.nealspeakerrepair.com/ here locally
Thanks a ton!! I gave him a call and left a voicemail. I will likely use that company as you've had a good experience with them.
Hi Jexx,
Your pictures aren’t very clear if the spider is really torn off or just came loose from its adhesive. Even if the spider just came loose there is still a good chance the aluminium piston (bobbin) is slightly bent and in that case repairing is no option. I have seen one similar case with the BX30 but that was the result of a removed low-cut filter because the owner loved the extra LF content. We had to replace the driver and Dynaudio didn't support it under guaranty since it was an user fault.
As far as I know there are no recones available (only the foam and rubber surrounds from 3rd parties but not complete recones) for Dynaudio’s since it is against the policy of Dynaudio. For replacement you have to contact an authorized Dynaudio Pro dealer for replacement.
My advice is to send first an e-mail with your pictures to Dynaudio (make sure you give the code number of the driver and the serial of the BX30) in Denmark because this should not happen under ‘normal’ circumstances. Maybe they can/will arrange something.
Your pictures aren’t very clear if the spider is really torn off or just came loose from its adhesive. Even if the spider just came loose there is still a good chance the aluminium piston (bobbin) is slightly bent and in that case repairing is no option. I have seen one similar case with the BX30 but that was the result of a removed low-cut filter because the owner loved the extra LF content. We had to replace the driver and Dynaudio didn't support it under guaranty since it was an user fault.
As far as I know there are no recones available (only the foam and rubber surrounds from 3rd parties but not complete recones) for Dynaudio’s since it is against the policy of Dynaudio. For replacement you have to contact an authorized Dynaudio Pro dealer for replacement.
My advice is to send first an e-mail with your pictures to Dynaudio (make sure you give the code number of the driver and the serial of the BX30) in Denmark because this should not happen under ‘normal’ circumstances. Maybe they can/will arrange something.
It's actually torn off. I apologize about the pics! It makes me feel that dynaudio is really poorly made stuff, honestly, because just as you said, this should NOT happen under normal functioning.
Dynaudio has some sort of warranty, then for this? I'll email them as well and see what they say. Very helpful advice so far. Thanks guys.
Dynaudio has some sort of warranty, then for this? I'll email them as well and see what they say. Very helpful advice so far. Thanks guys.
I understand your feelings but their 'stuff' has actually one of the highest qualities checks you can find in engineering and production and every stage is documented for their Pro products.
I agree that their equipment is looked over very well! Though I'm somewhat on the fence since I realized the cone of the driver is a rather flimsy, thin plastic, and truthfully, the spider (despite the tear) feels weak. Ah well. I'll see if it can be fixed for a reasonable price and hopefully restore my hope in dynaudio. 🙂 Thanks.
It's authentic, definitely. The sub sounds really nice when the speaker isn't cranked up and rubbing against the busted spider.
Maybe the cone feels flimsy compared to traditional cones but in fact these are high engineered magnesium silicate polymer based cones that are very light and rigid in the same time. The internal damping of the material is higher then traditional types.
The spider is loose enough to keep the cone untouched in vertical movements (very low dynamic compression) but it is strong enough to keep the cone from moving horizontal.All together it gives a sound of its own kind that is typical Dynaudio.
It is not for nothing that Dynaudio is one of the leading manufacturers in Studio monitoring. That means studio’s around the world with almost unlimited budgets when it comes to monitoring choose for Dynaudio because of the quality.
The only thing I don't like is the popularity that forced them to have a marketing department. This created a bigger distance between developers and end users and that can be frustrating sometimes. I guess that's the price of success.
The spider is loose enough to keep the cone untouched in vertical movements (very low dynamic compression) but it is strong enough to keep the cone from moving horizontal.All together it gives a sound of its own kind that is typical Dynaudio.
It is not for nothing that Dynaudio is one of the leading manufacturers in Studio monitoring. That means studio’s around the world with almost unlimited budgets when it comes to monitoring choose for Dynaudio because of the quality.
The only thing I don't like is the popularity that forced them to have a marketing department. This created a bigger distance between developers and end users and that can be frustrating sometimes. I guess that's the price of success.
I have a 12 inch Peerless where the spider split ( cracked) at the point where it joins the coil former. At low volume it worked OK but started scraping at higher displacement. Like your unit I guess.
I took a strand of wool used for knitting sweaters and soaked it with araldite and wrapped it around the former at the point where it met the spider. So it acted as a reinforced (?) bond between the two. It worked.
However a couple of years later I used the driver on an OB system where the cone displacement was tremendous and the spider was torn off ! But then I asked for it . The spider had actually got a bit brittle which is why it initially cracked off in the first place. I still have the driver pending a decision on what to do next. There are many other drivers around and so there is no urgency to get it fixed.
Good luck with yours.
I took a strand of wool used for knitting sweaters and soaked it with araldite and wrapped it around the former at the point where it met the spider. So it acted as a reinforced (?) bond between the two. It worked.
However a couple of years later I used the driver on an OB system where the cone displacement was tremendous and the spider was torn off ! But then I asked for it . The spider had actually got a bit brittle which is why it initially cracked off in the first place. I still have the driver pending a decision on what to do next. There are many other drivers around and so there is no urgency to get it fixed.
Good luck with yours.
If the driver is operating fine with no rubbing noises at low volume, then it should be okay to repair. If the edge of the spider matches up nicely to where it broke off, then all it needs is a small amount (not a great big blob) of araldite along the crack and it should work just fine. Once it (the adhesive) soaks a little into the fibres, it fors a very strong bond. Just be sure not to apply too much or you may affect the drivers compliance.
If the spider has gone brittle, it is relatively easy (depending on experience) to remove it and install a new one. It does require removal of the cone, but since the voice coil is already correctly set it is much easier and just takes a little patience. I can PM anyone more detailed instructions should they wish.
If you feel confident in re-gluing the Dynaudio then theres no reason not to do it yourself, but it is very important that the break is clean and mates back together easily or it could get ugly. Also as mentioned use no more glue than you need. If its along the VC former then its not a problem, but if a spider gets a radial tear (centre outwards) then it must be replaced as attempting to glue such a tear will make one side of the spider stiffer than the other. I have performed many such repairs, and speak from experience. I am more than happy to give advice on repairs, just send me a pm.
If the spider has gone brittle, it is relatively easy (depending on experience) to remove it and install a new one. It does require removal of the cone, but since the voice coil is already correctly set it is much easier and just takes a little patience. I can PM anyone more detailed instructions should they wish.
If you feel confident in re-gluing the Dynaudio then theres no reason not to do it yourself, but it is very important that the break is clean and mates back together easily or it could get ugly. Also as mentioned use no more glue than you need. If its along the VC former then its not a problem, but if a spider gets a radial tear (centre outwards) then it must be replaced as attempting to glue such a tear will make one side of the spider stiffer than the other. I have performed many such repairs, and speak from experience. I am more than happy to give advice on repairs, just send me a pm.
flyingtele:
The tear is clean and as such it likely can be reglued as you have said. The ONLY thing that is bothersome is there is a TINY radial tear of which is not even 1mm long near one end of where it has torn. It might even be so small that it wouldn't even be heard if I were to reglue it. I will be PMing you shortly. Really appreciate it.
The tear is clean and as such it likely can be reglued as you have said. The ONLY thing that is bothersome is there is a TINY radial tear of which is not even 1mm long near one end of where it has torn. It might even be so small that it wouldn't even be heard if I were to reglue it. I will be PMing you shortly. Really appreciate it.
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