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Replacing caps on DN12 crossover

 
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mikeytheo
Intermediate Contributor 25+


Joined: 16 Apr 2007
Posts: 33
Location: Sydney Australia

PostPosted: Mon Mar 23, 2009 3:56 am    Post subject: Replacing caps on DN12 crossover Reply with quote

To begin - I am a complete amateur but happy to attempt this.
From the schematic listed on the site, I need for each crossover;
5u 50V x 2
30u 50V
7u 50V
80u 50V

I have read elsewhere that the two 5u are in fact a 5u and a 4.7u.
I am having trouble in Aus locating exact value caps. I have been advised that the voltage rating will make no difference (ie can use 100V or higher).
Finding the right u value is proving difficult. I have also been advised that I can use two caps in parallel to equate to that correct value, but finding the right values in this fashion is just as hard.

Would I be making a huge mistake to use 4.7 instead of 5, 33 instead of 30 etc?

Note - This is to correct no output to a tweeter on one speaker and a woofer on the other - all drivers have been tested and are fine.
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ColinR
Über Contributor 1000+


Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Mon Mar 23, 2009 3:45 pm    Post subject: Reply with quote

I see www.speakerbits.com do Solens at a bit more than we pay in Europe, but on "capacitors" page 3 they do have some 4.7uF Bennics at £2.82.

Bear in mind these components will be much bigger than any electrolytics you can source from the stock of Farnell Australia, so you'll have to undo the multiway and put it and the rebuilt pcb in the reflex port to make things tidy.

I've never noticed any problem with the bass response with a crossover pcb occupying a third of the Concerto port, any other offers from members who don't have cloth ears Smile .
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