Question about Mission 78C Center Speaker

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Same problem - Mission 78C

I have the same problem with my Mission 78C centre speaker, it developed an intermittent fault whereby it sounded very tinny and I suspected the crossover. It's now gone completely and it's failure of the two (yes both) Keraform 82-LF130/QS bass units

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Posted on Jan 02, 2017

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SOURCE: Mission 78C Centre Speaker Only sound is coming

Hello.
The most likely cause is the Crossover unit inside the speaker has failed, It is possible that a wire has come loose also inside the unit. The Crossover unit is what separates the High Frequency sounds from the Mid and Bass Frequencies, if this unit has failed or a wire has come loose then it will cause your problem.
By Unscrewing one of the outer speakers you should be able to see the wiring. trace the two wires from these outer speakers back to there first join, make sure it is connected correctly.
There should be two wires coming into the back of the box, then directly to the crossover unit. from this crossover wires to each individual speaker.
I hope this helps your problem Regards GM

Posted on May 28, 2011

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1 Answer

No sound from the main cone mission m73


It sounds to me that there is something wrong with the crossover unit inside the speaker. These tend to use non-polar capacitors these sometimes fail, but it depends on how sophisticated the crossover is. It could use semi-conductors as well, which also fail.

Dec 11, 2011 | Mission M73 Main / Stereo Speaker

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Recently one of my mission 782 side bass driver has no sound, is it dead? Do you have any idea where i can get the driver to replace? and is it difficult to replace by myself?


Drivers are easy to replace in most speaker systems. There will be 'spade' type push-on connectors to the drivers. Here are contact details for the Mission service centre in the UK: http://www.mission.co.uk/Distributor.aspx?lang=En&Tab=29 They should be able to supply you with a replacement.

Sep 19, 2011 | Mission 782 Main / Stereo Speaker

1 Answer

Were can i get mission 705 speaker manual


Try the company:

http://www.mission.co.uk/

http://www.mission.co.uk/Contact.aspx?lang=En ask here.

http://www.mission.co.uk/Downloading.aspx?Tab=MANUALS It's not there.


STO Sound & Vision Country: USA Contact: Michael Leshner Tel: 1-215-886-1821 Sales E-Mail: sales@missionspeakersusa.com Service E-Mail: sales@missionspeakersusa.com
STO Sound & Vision Country: USA Contact: Michael Leshner Tel: 1-215-886-1821 Sales E-Mail: sales@missionspeakersusa.com Service E-Mail: sales@missionspeakersusa.com
STO Sound & Vision Country: USA Contact: Michael Leshner Tel: 1-215-886-1821 Sales E-Mail: sales@missionspeakersusa.com Service E-Mail: sales@missionspeakersusa.com STO Sound & Vision Country: USA Contact: Michael Leshner Tel: 1-215-886-1821 Sales E-Mail: sales@missionspeakersusa.com Service E-Mail: sales@missionspeakersusa.com

Jan 16, 2011 | Mission MS705 Speaker

1 Answer

My mission Mv-as subwoofer has an intermittant problem - it works for a short time and then the unit fails to function. there is not a problem with the power and the speaker unit is not damaged. is this...


Yes , the possible fault can be a suspected fault in the sub woofer power amplifier. You will need to remove to check the circuit.
It can be a faulty or dry soldering in the main board., re solder IC.
Also if the IC is faulty it can be erratic, a signal test must prove it right applied to the input.

Oct 27, 2010 | Audio Players & Recorders

1 Answer

Speaker not working


Either. You can probably order a new driver (speaker, no box) from Mission, then put it in yourself. This usually involves 4 screws around the speaker, then disconnecting a coulple of wires, putting the new one in and letting the speaker bed in for a while. You've then got a working speaker, and a nice paperweight.

If you have more money, and fancy an upgrade, you can buy some new speakers. An odd one wouldn't match the others, so it would be 4 satellites and a centre required. The subwoofer should be fine.

Jan 08, 2010 | Theater Research TR-502 5.1 Surround Sound...

3 Answers

Midrange faulty


I've had the same problem/s. A manufacturing fault with the original midrange drivers of all of my Mission 780's and 782 speakers. If you contact Mission through their website they will supply an updated style driver for about £45, I would recommend buying 2 because the other one will fail eventually, if like me you use them every day. All four failed within two years of each other.

Regards

kingar

Aug 04, 2008 | Mission 782 Main / Stereo Speaker

6 Answers

No Woof


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.

Aug 03, 2006 | Mission 780 Main / Stereo Speaker

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