Question about Mission 780 Main / Stereo Speaker

6 Answers

No Woof 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?

Posted by on

  • 1 more comment 
  • cnorton101 Aug 07, 2008

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

  • marksmart Sep 27, 2008

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

  • Anonymous Oct 30, 2008

    midwoofers

×

Ad

6 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

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.

Posted on Oct 14, 2006

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

The guy from missionparts@hotmail.com has these woofers available in North America. He is very knowledgeble with Mission products and provided quick delivery.

Posted on Aug 17, 2007

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

IAG told meto contact missionparts@hotmail.com for all mission 'old parts' which is the category that these 780's have fallen under.

Posted on Jul 03, 2007

  • david hall Jul 03, 2007

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

×

IAG have just lowered the price to £58 inc delivery.

Posted on Apr 04, 2007

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have the same problem and I phoned IAG and the price seems to have gone up to £32 EACH plus postage.

Posted on Mar 22, 2007

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 275 Answers

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.

Posted on Aug 03, 2006

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do i hook up logitech speakers #z313 to my desktop i need a diagram


Phone jack on woofer goes into computer tower (should be color coded green) and power cable on woofer plugs into 120VAC. Speaker phone jack plugs into back of woofer. The speaker cable has an on-off switch and volume control as well as a phone jack for your headset.

Nov 14, 2012 | Logitech SPEAKER SYSTEM Z313 PC Multimedia...

Tip

How To Bi-Amp And Bi-Wire Speakers!


What is the difference between bi-wiring and bi-amping?
Bi-wiring is using the same power source (amplifier) but separately connecting that power source to a woofer and a midrange/tweeter on a speaker.

Bi-amping is using two separate power sources (amplifiers) and connecting one amplifier to a woofer and the other amplifier to a midrange/tweeter on a speaker.

How do I bi-wire?
Your speaker must have two separate positive and negative connections (one set for the woofer and one set for the midrange/tweeter). Connect one wire between the positive terminal on the amplifier/receiver the positive terminal on the speaker. Connect the other wire from the negative terminal on the amplifier/receiver to the corresponding negative terminal on the speaker. Remove the jumper straps connecting the two sets of speaker inputs. Repeat this process for the second set of terminals on the speaker, connecting them to the same positive and negative terminals on the receiver/amplifier. Repeat the steps for each speaker you wish to Bi-Wire, connecting them to the appropriate terminals on your receiver/amplifier.

19772fe.jpg


How do I bi-amp?
Bi-amping is similar to bi-wiring, but involves separate amplifiers: one for the woofer and one for the midrange/tweeter. Passive bi-amping involves a direct hookup between each amplifier and the speaker terminals. True bi-amping involves hooking the preamp to an electronic crossover that replaces the passive crossover network in the speaker. The active crossover then connects to multiple power amplifiers.

ec6efa6.jpg

on Jul 13, 2010 | Audio Players & Recorders

1 Answer

Creative SBS 2.1 370 Speaker. hello how are you today, i have a question regarding the wiring in the volume on and off switch in the Creative SBS 2.1 370 Speaker setup, ive lost the little contoller some...


posted by Sandeep Sharma
hai, Here is the solution. when u cut the PCB from both sides u will find 4 cables i.e. green blue yellow and a copper wire coming from woofer and 3 cables white, red, yellow coming from audio lead. connect the green cable to copper cable and yellow to blue coming from woofer. Now take white cable coming from audio jack.connect this with yellow blue cables of woofer. Now attach Red and Yellow, connect these to green and copper cables of woofer and enjoy. if problem persist then make experiment to make interchanges with red white yellow coming from audio lead to the 2 sections of woofer side. woofer connections green/copper and yellow/blue remain same.
posted by Sandeep Sharma
an.astrologer@gmail.com

Aug 30, 2011 | Creative Labs SBS 370 Computer Speakers

1 Answer

I have a couple active phobic loud speakers, one is completely out of commission and won't play anything. The other will play sound but only through the tweeter, while the speaker itself does nothing. I...


The tweeter is working but the woofer driver isn't which will change the impedance (ac resistance) of your amplifier output. The other speaker isn't working which will again, change the impedance even more. This could eventually damage the I.C. amps should you apply too much volume to the speakers.
You can turn the volume up to normal listening level and with your finger, slightly press the cone on the woofer in and out a couple of time. Does it engage in sound when you do this? If so, the woofer's coil is damaged and the woofer must be replaced. No sound? Open up the speaker (stereo off) and make sure both wires are fully secured to the woofer. Should they be attached securely, your woofer is probably defective. Should you have a crossover network, you can obtain a good, known working woof and temporarily wire it where the old woofer goes, turn on your stereo (minimal volume) which can verify the network pcb (crossover) is working.

Apr 13, 2011 | Audio Players & Recorders

1 Answer

Woofer 4650 carcit digram


Establishing computer speakers includes networking to the devices from where media from be derived either as computers stereos of media players. First, the speakers require connection established between each component sound producing device that has an impression in generation capacity. Second, the speaker device have a box usually the woofer as central area with power cuicuit features. Connectable cables are power cuicuit related expected to extend from the woofer to the power outlet. Also, the woofer board would require as last connectivity, the cable attacchment to the devices that produce sound either as stereo music medis players, digital media displayers among mentionable media devices.

Feb 14, 2011 | Creative Labs MegaWorks THX 550 Computer...

1 Answer

No sound out of 15 speaker and only about half the sound out of horn


1. Confirm the woofer is not blown. Remove it and test it by using an AA battery and wire from the battery to the woofer terminals. When connected, the cone should jump. Alternately, if you have a meter, you can measure impedance. Infinity (or no jump with the battery method) means the coil is open and the speaker needs to be reconed.

2. If the woofer tests good, inspect the connections and wires from the input. Ensure there are no breaks. If the crossover includes a PC board, check for cracks or solder breaks and blown fuses / thermal damage. Repair as necessary.

If the woofer tests good and the wiring and connections are sound, reinstall and test. If there is still no sound from the woofer, test it by conecting it directly to the amp. If there is audio coming through the woofer, the issue lies within the cabinet. Consider replacing all internal cabinet componentry, including inputs. If the input is a 1/4" jack, it is likely thae contacts are bent out, away from the connector. Bend them back to center slightly, and clean them with alcohol or "deoxit".



"Half" the sound from the horn seems normal, as it is not intended to produce bass. If you mean half-volume, that is dependent on settings and measurements and is difficult to diagnose. clmrt5000_1.jpg

Jan 07, 2011 | Yamaha S115-IV 15" PA Speaker Cabinet...

1 Answer

Dear Sir, I hav dell vostro 1015 laptop with windows Xp Operating system. I have purchased 4.1 subwoofer system. When i am connecting subwoofer to pc audio output & all 4 speakers to back of...


Recheck your wiring and instructions. If your woofer is self powered perhaps the amp is no good. Actually it better have amps since the laptop output will not power those speakers.

Mar 31, 2017 | Computers & Internet

6 Answers

Dell MMS-5650 5.1 speakers not working


sounds like they are picking up interference. make sure they are grounded well.

Aug 19, 2009 | Dell 5650 Computer Speakers

1 Answer

Bi-amp


After examining a picture of a 5802 ( I have been servicing adcom for over 20 years ), these are not bi amp posts, but bi wire posts.

Bi-amp means that 2 amps are being used, one for highs, one for lows. This means that you have no crossovers in the speakers, instead, you have an electronic crossover between the amps and the pre-amp. The highs and lows are separated in the electronic crossover. One amp handles the lows, one handles the highs.

Bi-wire means that you have the crossovers still inside the speakers. The amp handles the full range of music ( highs-mids-lows ). Different kinds of speaker wire produce different results. If you have bi-Wire terminals on your speaker, they come with shorting wires, that tie the tweeter + to the woofer + on the back of the speaker, and the tweeter - to the woofer - . When the shorting wires are removed completely, you have now electrically separated the tweeter and woofer from each other, while maintinaing the crossovers ( inside the speaker ) for each.When this is done, you can now bi-wire the speakers and amp, and use different kinds of wire for the lower frequencies and the upper frequencies, depending on your ears ( everyone hears a little differently, thats why there are so may makers of components, and wire ).

Why do we have crossovers?.....the tweeter voice coils ( the things that make the sound ) are made of hair thin wire. This wire cannot handle much power and if you were to put bass in to a tweeter, you would burn the tweeter out almost instantly. A tweeter is a very light, fast moving device which can react very quickly to high frequency sounds ( symbols, triangles, guitar strings....). Woofers are more rugged. They have voice coils made of heavier wire and are designed for larger movements that Bass demands. Subsequently, woofers aren't very good for high frequencies because they are slower devices.

So what do we do ?.....Keep the lows away from the tweter and the highs away from the woofer.....thats the job of the crossover.

In the event that your speaker has the crossover OUTSIDE the speaker box, you should check ( as always ) with the manufacturer of the speaker to see how it can be changed to suit your needs. Remember to always read and follow your owners manual. Good luck....Rob

Feb 22, 2008 | Audio Players & Recorders

Not finding what you are looking for?
Mission 780 Main / Stereo Speaker Logo

1,134 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mission Audio Players & Recorders Experts

 Grubhead
Grubhead

Level 3 Expert

5508 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Brad Brown

Level 3 Expert

17431 Answers

Are you a Mission Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...