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Mission 780 Main / Stereo Speaker

No Woof (by 3 users)


posted by Clive on Aug 03, 2006


The Woofer on one of my speakers has no sound coming from it. I have them bi-wired so I switched cables and still the woofer produced no sound, leading me to believe that it is a speaker fault rather than cables or amp. The speakers sit on spikes on Mission Stance stands, as far as I know they have not been knocked over, at least, no one is admitting to it!

Can I safely remove the back panel and check the wiring or is this best left to an engineer?
I have the same problem.
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2 Other Users Have The Same Problem

Comment by marksmart, posted on Sep 27, 2008

I have the same problem, thanx for the advice. Mark

Comment by cnorton101, posted on Aug 07, 2008

one of my speakers amp light is not on. Can it be a fuse?

Best Solution

posted on Oct 14, 2006
FixYa! (100)

Bondus

Rank:Apprentice Apprentice
Rating: 100%, 9 votes
If these are Mission 780s your talking about, you're not the only one. The woofers supplied with the speakers originally have a known design/manufacturing flaw causing them to go "open circuit" after a few years use.

The good news is that IAG (who now own Mission) can supply you with a pair of replacements for about £45 plus postage. (You'd be forgiven for thinking they should supply the replacements for free given the cost of these speakers new and the fact this is a design/manufacturing fault).

Replacing your woofers is easy. Take off the front baffle. Remove the four rubber plugs that the baffle attaches too, and take out the 4 screws you'll find behind them. Now ease off the plastic moulded front pannel. Remove the four screws holding the woofer in place. Pull the spade connectors from their tags on the back of the speaker. Put the new woofer in by following this proceedure in reverse.
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Solution #2

posted on Aug 03, 2006
Helpful (85)

Pravin

Rank:Wiz Wiz
Rating: 83%, 567 votes
First, check if the speaker coils are blown (open Circuit). Take a multi meter, and, after removing the cales connected to the speaker, check for continuity. Reading should be either 4 or 8 Ohms. If there is no continuity, then there is nothing you can do except get a replacement. There is no need to get a technician to to do this basic check.
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Solution #3

posted on Jul 03, 2007
Helpful (85)

speakerguy88

Rank:Apprentice Apprentice
Rating: 85%, 1 votes
IAG told meto contact missionparts@hotmail.com for all mission 'old parts' which is the category that these 780's have fallen under.

Comment by speakerguy88, posted on Jul 03, 2007

IAG now informs to contact missionparts@hotmail.com for 'old parts' such as 780 woofers and others.
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Solution #4

posted on Aug 17, 2007
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salada

Rank:Apprentice Apprentice
Rating: 0%, 0 votes
The guy from missionparts@hotmail.com has these woofers available in North America.
He is very knowledgeble with Mission products and provided quick delivery.
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Solution #5

posted on Apr 04, 2007
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Guest

Rank:Apprentice Apprentice
Rating: 0%, 0 votes
IAG have just lowered the price to £58 inc delivery.
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Solution #6

posted on Mar 22, 2007
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finsaah

Rank:Apprentice Apprentice
Rating: 0%, 0 votes
I have the same problem and I phoned IAG and the price seems to have gone up to £32 EACH plus postage.
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