Hi,
I have Dynaudio Sapphire's and both the woofers on one speaker have stopped working.. I have tried basic troubleshooting with switching cables between left and right and the same speaker does not work.
I am trying to open it to test the crossover circuit and was hoping that the area on the back where the cables are connected can be opened. I have opened the screws but the "thing" does not budge.. (see attached pic)... I don't to damage it.. was hoping I can get some guidance on minimal opening to test out the crossover..
Thanks in advance,
Idaho.
I have Dynaudio Sapphire's and both the woofers on one speaker have stopped working.. I have tried basic troubleshooting with switching cables between left and right and the same speaker does not work.
I am trying to open it to test the crossover circuit and was hoping that the area on the back where the cables are connected can be opened. I have opened the screws but the "thing" does not budge.. (see attached pic)... I don't to damage it.. was hoping I can get some guidance on minimal opening to test out the crossover..
Thanks in advance,
Idaho.
Attachments
Try taking the bottom woofer out and look for the crossover with your phone’s camera and its light on. Look to see if a wire has come loose from the board. Also if you have an ohmmeter, remove just one lead from the woofer and measure the woofers resistance. If the woofer is open circuit then test the other woofer too.
From the woofer positive terminal measure to the positive input connector on the back - shoulsd be less than an ohm, if its high impedance or an open connection between the cross over and the woofers then its very likely a wire or connector ( and a small chance its the series woofer crossover coil). If you were playing it very loud it could be the woofers , but more likely a loose wire
From the woofer positive terminal measure to the positive input connector on the back - shoulsd be less than an ohm, if its high impedance or an open connection between the cross over and the woofers then its very likely a wire or connector ( and a small chance its the series woofer crossover coil). If you were playing it very loud it could be the woofers , but more likely a loose wire
One would like to think on that expensive of a speaker, the xo will no be attached to the binding post that you are trying to remove. It also looks like it might be tight trying to access through that hole and like tick pop, I would pull the lower woofer.
If you continue on the back you can try wiggling the posts while pulling on them and see if you can work it free. There's likely a gasket that has bonded to the cabinet. If that doesn't work you will need a glazing prybar and work around the edge until it begins to loosen.
If you continue on the back you can try wiggling the posts while pulling on them and see if you can work it free. There's likely a gasket that has bonded to the cabinet. If that doesn't work you will need a glazing prybar and work around the edge until it begins to loosen.
Hi Idaho,
try to get the woofers out to get access into the box. But be warned: At some periods during their long history Dynaudio has used a special glue, silicone-like, as a gasket. This may have been used at the terminal, too, and it may have been used at the drivers. If so, it will be difficult to unmount them, but access to the crossover is likely to be a lot better through the woofer cutouts, I don´t think that opening the terminal will be sufficient.
Good luck
Mattes
try to get the woofers out to get access into the box. But be warned: At some periods during their long history Dynaudio has used a special glue, silicone-like, as a gasket. This may have been used at the terminal, too, and it may have been used at the drivers. If so, it will be difficult to unmount them, but access to the crossover is likely to be a lot better through the woofer cutouts, I don´t think that opening the terminal will be sufficient.
Good luck
Mattes
Thank you folks...As suggested I opened up the lower woofer and could access the crossover as well.
As it happens..both woofers have infinite resistance and so I am assuming that the voice coil is gone. Thank so so much.
Is it with getting voice coil redone i.e., does repairing voice coil get close to original sound or should I try to get replacement for these 4 ohm speakers which seems to be difficult (to get originals)...?
Thanks in advance.
As it happens..both woofers have infinite resistance and so I am assuming that the voice coil is gone. Thank so so much.
Is it with getting voice coil redone i.e., does repairing voice coil get close to original sound or should I try to get replacement for these 4 ohm speakers which seems to be difficult (to get originals)...?
Thanks in advance.
They are most likely worth the repair. Dynaudio has a trade in service for defunct drivers too, but specialized companies will be happy to rewind the coils. Be it that the hexacoil technique is hard to reproduce. Sure the litze wires still connect to the coils?
Hi meidaho,
May I ask where is the crossover located?
I want to apply some WA-Quantum Loudspeaker Chips on my Dynaudio Sapphires. These chips need to be attached to the loudspeakers cabinet, as close as possible to the crossover, but I can't find anywhere the info regarding crossover location.
May I ask where is the crossover located?
I want to apply some WA-Quantum Loudspeaker Chips on my Dynaudio Sapphires. These chips need to be attached to the loudspeakers cabinet, as close as possible to the crossover, but I can't find anywhere the info regarding crossover location.
Infinite resistance means open circuit, not necessarily gone (fried) voice coils. There may be a broken connection where the flexible braid meets the voice coil. Scrape some enamel from both of the sides of voice coil wire before glued braid spot on the cone and check for dcr again.