EAW 3-way Cab, No Midrange - diyAudio
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Old 8th May 2013, 02:44 AM   #1
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Default EAW 3-way Cab, No Midrange

I have an EAW FR153HR and the midrange speaker stopped working. I removed the speaker and it works fine when powered directly. I reckon I fried something in crossoverland, but I don't know what I'm looking at.

I'm relatively handy, and I have a decent multimeter, but I have no clue how to trouble shoot this problem. I don't even really know what I'm looking at.

Pic Here:
Click the image to open in full size.



Specs here: http://www.eaw.com/docs/2_Legacy_Pro...es/FR153HR.pdf

Last edited by Pano; 8th May 2013 at 02:49 AM. Reason: fixed photo link
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Old 8th May 2013, 03:52 AM   #2
JMFahey is offline JMFahey  Argentina
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Test whether the midrange works or not by touching its contacts with those of a 9V battery.
It should click.
The cone will also move slightly (around 1 mm) , connected one way forward, the other way backwards.
If no sound , it's fried.
If it sounds, connect it straight to an amp and play some music, at low volume , a couple watts, we want to know whether it scratches, buzzes, farts, etc.
Good luck.

Not easy to suggest a replacement other than an original one, but if unavailable some Pro reconing shop such as Orange County Speakers may help you.

Post a couple back and front pictures to know what are we talking about.
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Old 8th May 2013, 04:01 AM   #3
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Looking at that pic it looks like the two blue capacitors in the middle may be bad. that would definitely make the mid stop working!
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Old 8th May 2013, 04:09 AM   #4
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Originally Posted by Zero Cool View Post
Looking at that pic it looks like the two blue capacitors in the middle may be bad. that would definitely make the mid stop working!
How can I tell if capacitors are bad?

If they are bad, what's the best place to order them from?
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Old 8th May 2013, 11:17 AM   #5
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Those two caps certainly look unhappy; clip them out, read their values and voltage (I hate electrolytics in crossovers), and change them. You could do a test with a tone generator and a multimeter, but you'd have to clip them out of circuit first, and since they're glued to the board getting at them's not that easy.

Remember to check whether they're non-polarised, which would normally be the case in crossovers, and get the same voltage, same capacity.

As to your local components supply, where are you based? I suspect my locals wouldn't be much use to you.
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Old 8th May 2013, 12:23 PM   #6
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Thanks. I'm in Philadelphia, U.S.A.

What do you mean by "check whether they're non-polarised"?
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Old 8th May 2013, 12:32 PM   #7
Mooly is offline Mooly  United Kingdom
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Quote:
Originally Posted by DanophonicDan View Post
Thanks. I'm in Philadelphia, U.S.A.

What do you mean by "check whether they're non-polarised"?
Not polarity conscious. Can be fitted either way. You can make a "bipolar" cap from two identical electrolytics fitted in series and wired "back to back" such that either plus to plus or minus to minus connect together. The total value is one half the value of each cap. So two 100ufs in series make a 50uf bipolar cap.
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Old 8th May 2013, 12:34 PM   #8
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Electrolytic caps (of which those are) come two ways. polarized as used in power supplies etc or Bi-polar or sometimes called Non Polarized for audio applications.

Parts express is a very good source for caps. the caps will be marked with a value and a voltage. for example they might says 4uf 100v or 25uf 50v etc.

you can use a higher voltage rated part without issue. but the capacitance value in uF should be the same.

To me it looks like the top one of the two has failed and blown open. you are going to have to remove those two parts, order new ones and solder them in. do you have a soldering iron?
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Old 8th May 2013, 12:35 PM   #9
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Ok. You've been a great help. I see that the caps have an "NP", which leads me to believe that they're non-polarised.

They are 30uF 100v. The closest I can find is 33uF 100v. Will that suffice?
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Old 8th May 2013, 12:37 PM   #10
Mooly is offline Mooly  United Kingdom
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33 uf (you mean in a non polarised form) is fine to replace a 30 uf.
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