Hello to all DIYaudio members. I hope that someone here may be able to assist me.
The tweeter in my Mission M70 bookshelf loudspeaker went kaput recently for unknown reasons. I have two options:-
a) To buy a factory replacement. I have emailed the local representative for Mission and they have yet to reply to me
b) To buy an equivalent tweeter. Does anyone here knows a drop-in replacement for the tweeter?
Thank you very much. Photos attached.
The tweeter in my Mission M70 bookshelf loudspeaker went kaput recently for unknown reasons. I have two options:-
a) To buy a factory replacement. I have emailed the local representative for Mission and they have yet to reply to me
b) To buy an equivalent tweeter. Does anyone here knows a drop-in replacement for the tweeter?
Thank you very much. Photos attached.
Attachments
Hi,
Hmm because of the physical dimensions it could be tricky. I can suggest an eBay search may turn something up.
Is it really dead, if you momentarily and I mean momentarily connect a small 1.5V battery to the terminals, does it make a noise. If so you could be lucky and the fact that it makes a noise could suggest a wiring or crossover component failure. I hope it is a simple crossover resistor failure or a loose wire. If not you may have to be creative. Which would be less than ideal and maybe a crossover component adjustment. Ideally some frequency response measurements to get it back in the original ballpark so it matches the other loudspeaker.
Good luck.
Hmm because of the physical dimensions it could be tricky. I can suggest an eBay search may turn something up.
Is it really dead, if you momentarily and I mean momentarily connect a small 1.5V battery to the terminals, does it make a noise. If so you could be lucky and the fact that it makes a noise could suggest a wiring or crossover component failure. I hope it is a simple crossover resistor failure or a loose wire. If not you may have to be creative. Which would be less than ideal and maybe a crossover component adjustment. Ideally some frequency response measurements to get it back in the original ballpark so it matches the other loudspeaker.
Good luck.
Hi, Raymond. It is confirmed dead, as I have removed the tweeter and measured its DC resistance. The voice coil is open. There is one listing in ebay UK, where a used tweeter is listed for around 23 pounds.
I'm trying to find information for an alternative brand that will fit in, as usually, loudspeaker manufacturers will commission the specialist manufacturers (Peerless, SEAS etc) to make raw driver units for them.
As one tweeter already failed, I'm expecting the other unit will fail too, so, buying 2 units for replacement may be a good idea.
I never overdrive this loudspeaker set, so the failure is most strange.
I'm trying to find information for an alternative brand that will fit in, as usually, loudspeaker manufacturers will commission the specialist manufacturers (Peerless, SEAS etc) to make raw driver units for them.
As one tweeter already failed, I'm expecting the other unit will fail too, so, buying 2 units for replacement may be a good idea.
I never overdrive this loudspeaker set, so the failure is most strange.
Well, you have nothing to lose. Grab a sharp knife and lift the dome off. You never know - it might be the case that the wire has a little break in it, which can be reconnected.
It's unlikely, but it's worth a shot before spending money.
Chris
It's unlikely, but it's worth a shot before spending money.
Chris
When going DYI, I always ponder if the work is going to be worth my time (either ending up with a great result or learning something). I d suggest buying yourself a new toy if this comes up negative.
My small missions (can't remember model number) used a Vifa D19 tweeter.
The problem here, is unless you have a DIY sourceable model number - which you don't (and Mission could have asked for custom properties), you'll get a mismatch with your other speaker.
The cheapest option is to stump up the 23 quid for the used. That's actually not a bad price really.
Otherwise, you could source a pair of neo format tweeters - a few available, re-work the cabs... but then learn how to design and redo the crossover (non-trivial).
The problem here, is unless you have a DIY sourceable model number - which you don't (and Mission could have asked for custom properties), you'll get a mismatch with your other speaker.
The cheapest option is to stump up the 23 quid for the used. That's actually not a bad price really.
Otherwise, you could source a pair of neo format tweeters - a few available, re-work the cabs... but then learn how to design and redo the crossover (non-trivial).
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