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I have a Mission 753 speakers (from 95) which I think are in trouble. They sound very scratchy esp. on piano music. The rest of the system is a CSD/PSC/HiCap/102/140 (recently serviced) and NACA5. I contacted Mission and eventually managed to prise some help from them. They can no longer supply replacement tweeters but can sell me replacement diaphragms for 44 quid "which will restore the speakers to their former glory sir". Should I try this or just use them for plant stands?
When I bought the speakers my dealer just wouldn't let me have SBLS (I had a CD3 then) but now I wish I'd overruled him and gone ahead anyway. We may pay a bit more for Naim gear but this experience has taught me a very valuable lesson. So that's speaker purchase number 3 that has ended in disappointment! Also I live in a remote part of the world and can only listen to most of the Castle range, Credos and a pair of DBL's on sale for 5 grand (which are out of the question BTW). Any suggestions welcome! NP |
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Senior Member |
Hi Neil:
When I was in the retail end of Hi-Fi we sold A LOT of Mission speakers. The most common problem was tweeter failure and we kept about 2 dozen diaphragms for each tweeter type in stock. The only other speaker company to match Mission's tweeter failure rate was B&W with the 110, 220 and 330 series, - tweeters AND bass/midrange units burning everywhere. 44 quid seems steep for a couple of diaphragms or does that include S&H) but it's much cheaper than new speakers. If you get them be very careful on installation as they're quite delicate. Best Regards, |
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Mark,
that's very valuable info! I don't mind the 44 pounds but my question is "will it fix the horrendous scratching?" - is it the case that the rest of the tweeter is AOK? If they can be fixed that simply then I shall buy some but I'll be planning on replacing them with a manufacturer who values longevity. A friend has loaned me some Severn 2E's from Castle - the Missions are un-listenable right now. What other manufacturers did you get a good impression from in your experience in the business? cheers Neil |
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quote: Ahhh Mark, that brings back memories... my trusty old 220i's (my first pair of speakers, and well before my first LP12 baptism, ok?) ended up with a crispy-fried tweeter after a particularly hard party on the end of a grunty 200W power amp. Were those tweeters of particularly flimsy construction, or what?! Rico - musichead |
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Member |
The tweeters used by Mission are no better/worse in the reiability stakes than any other.
The vast majority of speaker manufacturers (including Naim) buy their tweeters from the likes of Scan, Audax or Seas - very few build their own, allthough some may modify them. If the tweeters in your Mission/B&W blow, well, thats either due to bad luck, abuse or amp clipping. However, I am shocked to learn that Mission don't keep spares for the 753. The 753F was a decent speaker and has only just been discontinued. Remember that most soft/plastic dome tweeters will fry at around 5-10 watts RMS - thats LOUD music, but easy to achieve through amp clipping. Rob. |
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Senior Member |
Hi Neil:
Re: >I don't mind the 44 pounds but my question is The rest of the tweeter (if memory serves) is just the magnet. However, Mission use(d) a magnet with a thin circle cut into it that the diaphragm seats into and this gap (to use its technical term - honest) was filled with a heat dissipating fluid. If yours have this feature just be careful not to let it get on other parts, - it's messy. The scratching you hear is the deformed diaphragm scraping inside the gap. >What other manufacturers did you get a good OK, keep in mind we didn't stock every speaker available (and weren't a Naim dealer at the time, worst luck) but KEF, Ruark, Tannoy, Castle and Spendor spring to mind. My apologies to those I forgot. Best Regards, |
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quote: Hmmmm welll yes and no. In this case (my old B&W DM220's) the damage was certainly not from amp clipping. The abuse was in a quick turn-off instead of a wind-down... the heat dissipated into the lead-out wires and melted the solder joint/wire... and then proceeded into the voice coil. They were reasonably carefully run (for the conditions) on the end of the muscular amp in question, but my contention was that they were under-engineered (esp for a 100WRMS speaker). OTOH, they were an (under-engineered) budget item too. Competing products at similar price-points did not gain a reputation for blowing up at the drop of a hat. Still, they were certainly not as 'delicate' as other knife-edge engineered products of the time such as the MF A100, or what was that 16x oversampled Cambridge CD player? Rico - musichead |
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