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Multi-Way Conventional loudspeakers with crossovers

Focal 926 - How to Access
Focal 926 - How to Access
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Old 5th January 2018, 10:03 AM   #1
ralphmalph is offline ralphmalph
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Default Focal 926 - How to Access

Hello, My Focal Electra 926 have developed a problem and I need to check the crossovers. Only problem is that I can not work out how to disassemble them without the use of a saw.
Has any body here had experience and can point me in the right direction.
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Old 5th January 2018, 10:09 AM   #2
Mooly is offline Mooly  United Kingdom
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Focal 926 - How to Access
If there is no obvious way to access via any rear connector panel then the usual method would be to remove the speaker drive units and access from the front.
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Old 5th January 2018, 12:50 PM   #3
ralphmalph is offline ralphmalph
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Quote:
Originally Posted by Mooly View Post
If there is no obvious way to access via any rear connector panel then the usual method would be to remove the speaker drive units and access from the front.
Thanks very much I am in. Looks like blown cap.
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Old 5th January 2018, 12:55 PM   #4
Mooly is offline Mooly  United Kingdom
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Focal 926 - How to Access
Wow, that doesn't sound good. You mean it looks physically 'popped'.
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Old 5th January 2018, 01:52 PM   #5
ralphmalph is offline ralphmalph
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Originally Posted by Mooly View Post
Wow, that doesn't sound good. You mean it looks physically 'popped'.
Yes all bulged, seriously rounded on top instead of flat. In a way it could be good because it is a simple and cheap job. I was much more concerned about the drive units being damaged as I would have had no chance of getting a like for like replacement.
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Old 5th January 2018, 02:38 PM   #6
Mooly is offline Mooly  United Kingdom
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Focal 926 - How to Access
That sounds unusual. Caps (talking of electrolytics generally) usually bulge because of external causes such as a high DC voltage being applied. If that were the case then you would have been aware of other issues though.

I wouldn't like to second guess this tbh.

Edit... and remember electrolytics in crossovers are non polarised types.
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Old 5th January 2018, 02:48 PM   #7
Zvu is offline Zvu  Serbia
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Buy foil caps of the same value. Ditch all bipolar caps from crossover that you can. Large values (100uF and more) change with new bipolar capacitors.
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Old 5th January 2018, 03:30 PM   #8
eriksquires is offline eriksquires  United States
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+1 Ralph. Focal often installs crossovers through a woofer slot. Hope you have a long Philips screwdriver!

Mundorf MKP is a much better sounding cap than Focal's OEM brand, inexpensive and about the same physical size.

It IS important that you measure DC first though! Any multimeter will do this. Just measure the voltage on your amp outputs using DC and make sure the result is less than 0.5V.

Best,

E
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Old 11th January 2018, 02:13 PM   #9
ralphmalph is offline ralphmalph
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So as well as one of the caps going on one of the crossovers I also have 2 dead tweeters and 1 dud midrange. I am no expert on speakers, to say the least, so if somebody would be so kind as to recommend replacements for me to use then I would appreciate that.

Here are the links with specs to the original drive units. My goal would be to at least equal the original sound quality but if it can be improved then I would be prepared to invest in that.

Tweeter
Focal Tc120td5 20mm Tioxid Dome Tweeter

midbass
Focal 6w4311b 6-1/2" Shielded "w" Cone Midbass

thanks in advance.

Edit: I actually have the version of the tweeter with the smaller face plate 91.95mm or 3 5/8 inches

Last edited by ralphmalph; 11th January 2018 at 02:32 PM.
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Old 11th January 2018, 02:29 PM   #10
asuslover is online now asuslover  Romania
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Focal 926 - How to Access
Quote:
Originally Posted by Zvu View Post
Buy foil caps of the same value. Ditch all bipolar caps from crossover that you can. Large values (100uF and more) change with new bipolar capacitors.
do you know a place to buy cheap/ affordable foil capacitors?
I want to upgrade my klipsch crossovers, but the foil caps are very expensive.
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