#11
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Is there a way to test if the crossovers are OK, with a good multimeter?
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#12
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You're going to have to talk to your dealer and/or Wilson and get them fixed. I wouldn't mess with it, and the crossover is indeed potted and can't be serviced.
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#13
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I believe the Mac autoformer protects speakers from DC, which is very damaging to every speaker component. Something to think about. Any amp is subject to catastrophic failure. The older the amp the more likely it is to fail: you have a very expensive heavy speaker. Your pride and joy, only to find it destroyed and the possibility of a house fire. Speaker fuses are of little help from heavy raw DC from a powerful amp.
Last edited by Charles; 02-16-2015 at 12:05 PM. |
#14
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It is of course very easy to say but would be difficult to implement, is it time to change the speakers and amp?
Even if you managed to change the woofers and checked the crossovers, you have a burn-in left channel and a hybrid right one with old midrange / tweeter and new woofers. How they can sing in harmony is out of my sense. As Charles has mentioned, if you have expensive speakers, it is too risky to run really old amps on them. Isn't it time for a new amp? |
#15
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Quote:
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#16
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Quote:
Good advice on amps in several of the previous posts. Good luck with all.
__________________
Glenn... Canton Reference 9 Clearaudio SM Pro Focal Bathys JLA 10" Dominion Kuzma Stabi S w/MC & MM Magnepan 1,7i McIntosh MA8950 & MR88 Oppo 203 Roon Nucleus Rose Hifi RS150B Shunyata Gemini-4 Sony ST-A6B, TA-F6B, ST-J75 & PS-X75 Sorane SA1.2 & TA-1L Stillpoints LP1v2 WW Pt, Au & Ag |
#17
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Quote:
The good news is that the crossover is "probably" not damaged. If it was the most likely failure would be a coil or soldered connection given the heat generated to melt the speaker voice coil. A speaker of this quality and precision deserves to be serviced and checked by the experts that created it. If you go DIY and it doesn't go well the cost will exceed any cost to send it to Wilson. Bite the bullet - I know it's painful - but necessary in this case.
__________________
Caelin Gabriel President Shunyata Research |
#18
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Sasha's haven't been around that long. Are they not still in warranty.
Sonus Faber replaced mine after 4 years free of charge. I replaced them myself, there was nothing to it. However the damage was not my fault. Maybe this isn't yours.
__________________
Mike ~~~ Home Theater Mcintosh MC205,MX150,MS300,MVP871,Pioneer BDP-51FD,Roku,Pioneer Signature Elite 141,Furman It-Reference15,Sonus Faber Cremonas Two Channel Room Mcintosh MC501's,C2300,MCD500, ClearAudio Emotion TT,Furman It-Reference15,Sonus Faber Elipsas,Sonos Connect |
#19
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Well, I was away for a while. Thanks for all the input.
The good news is that the crossover is fine. I wanted to test the speaker by hooking it up to a good amp, but was concerned it was a dead short. So I measured the resistance/ohms of both speakers. The good speaker reads 2.6 ohms on the speaker terminals. The one with the blown woofer read 2.6 ohms, so it was not a dead short. I hooked up a spare amp, and the bad speaker played music just fine through the Watt module = tweeter/midwoofer. In fact, I played some deep bass music, and the blown woofers play bass. I removed the top bass woofer, see the pics: it's a Scanspeak 18w85??. Looks like maybe 21w8535-01. I think I read they are modified to Wilson specs. The woofer is installed like most: the wire from the crossover is soldered to the speaker terminals. The woofer is screwed VERY VERY tightly to the baffle. I wonder if they use stretch fasteners, usable once. Replacing the woofers just requires the new drivers, maybe new fasteners, and an excellent solder job. I'm not concerned with having new woofers with an "old" speaker. If they are from Wilson, they will be perfect Sasha 8" bass drivers. Once properly installed and run in, there is no reason the speaker will not sound as good as it was. There is no reason to replace the whole thing. Still, looking at the pics makes me feel a bit sick. BTW, I run the Plinius SA-250 in class A/B mode, not class A. Class A does make the amp run SUPER hot. It is switchable. The Plinius dealer says it's fine to run it 24/7 in A/B mode. Plinius is going to fully service and repair the amp. The ARC preamp tubes are failing: snap, crackle, pop. That started the very night this happened, when I first powered up the system. I wonder if that contributed to this. Tom |
#20
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I did not buy them new. I've had them for about 2 years. I guess my dealer will let me know, but I doubt it.
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