Replace Dynaudio woofers?


Hello. I have a pair of woofer blown Dynaudio Contour 1.1s They have been sitting, unused, in a clean, temp controlled room for at least 15 years. I hooked them up recently and the tweeters were emitting sound.

Is it worth to source OEM woofers to replace? Is it an easy job I can manage myself? Any advice would be appreciated. Thank you in advance. 

xidnpnlss

@xidnpnlss Your first challenge will be de-soldering! If you’re not up to investing $200 or so for some decent soldering kit, you might consider taking the crossover to a local tech shop or friend who can undo and redo the joints for you. Of course, you could get by with a 25 Watt iron and a ‘Solderput’ sucker (nothing less, no substitutes).

The component that blew up on the one board was one of those ‘$2.00 resistors’ referred to above, often termed ‘sand resistors’ —they are not expensive. The other commonly replaced items include any electrolytic (‘can’) capacitors, as they dry/wear out after years of service, even if they’re not used. Again, not a terribly expensive part unless you’re going for super high quality. Parts Express can hook you up. Would be a shame to have them fail soon after you get the speakers all reassembled. Original performance will also be restored.

Good job on getting the first woofer out. I approve of your method, for what it’s worth. Good luck with your project, I’m sure you’ll be pleased with the result.

@tecknik Yes, I know that blown drivers can't be repaired. I already have the part number from Dynaudio and some good aftermarket recommendations from the thread. My situation now is figuring out if it's actually the driver that's blown or the crossover. 

What would you recommend to replace the wiring? 

@oldrooney Thank you for the support and commendation! And thanks for the bit of knowledge on the components. If I already knew how to solder I'd be all over this..

But I dont and I'm actually not at a place right now to learn or invest in a good soldering set-up. Someday, for sure. I'll be calling around techs after the holiday break. 

I'll be sure to update this thread with whatever transpires! Fingers crossed thrice it works out. 

It looks like Dynaudio is using standard 12ga copper wire. There’s nothing wrong with that choice, it does the job, especially considering you are talking about runs less then a foot. I’d cut the ends, strip back some fresh wire and reuse it after you have gotten the crossovers repaired. See if there are any speaker repair shops near you, they can fix the crossovers. Or give GR Research a call (1-940-592-3400) they could probably make replacement crossovers as well. The cost to repair can vary greatly depending upon the level of parts used so stick to a budget and don’t let them talk you into high end stuff. I’d keep the budget under $200 for the pair that way you have some budget leftover to replace the drivers. Assuming the cabinets are in good shape I’d peg their value at around $600-700 w/ fresh crossovers, and $900-1000 with fresh crossovers and new oem drivers.

@eidnpniss I re did  my Dynaudio S25 with Neotech OCC 14 awg on the midwoofer and 21 awg on the tweeter. 

OK

1. you have seen/shown us, the crossover has a blown/burnt part. It must be replaced. You can get the crossover board out, that’s how it got in, then get new part from parts express, then ____ who removes/replaces the part. Do you know anyone who can solder? You could easily mail the crossover board to _____?

2. woofer glued: I was wrong: looks like the woofer was previously removed, the sound seal (round foam or rubber ring) was not replaced, so they glued it back in. You should solve that problem when you put the woofer back in: a continuous seal to prevent any air/sound in/out, then screw, not glue the woofer back in.

3. to prove the removed woofer is ok, you can turn the volume all the way down, touch speaker wires to the two tabs on the loose woofer, turn volume up very slightly, see/hear it move, means voice coil is still working/ok. Or, remove other speaker’s woofer, make some wire jumpers long enough for trial.

IF woofer cone does not move, that means the woofer's voice coil got melted. If so, you could ship the woofer to Miller Sound, or replace them both with something parts express recommends.