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Help with crossover capacitors

I am re-capping some Altec Lansing 890C Bolero speakers.  They have 6uf/50volt and 3uf/25 volt caps.  What will change if I use 5.6uf and 3.2 caps?  I can't find the exact 6uf and 3uf values.  Should I go a little bit higher on those values or lower?  Any suggestions?  I'm looking at Dayton, Mundorf or Jantzen caps but I'm open to suggestions.

dannybad
grannyring's avatar
grannyring
6,436 posts
 
Alex is spot on as I use the .01 Duelund tinned copper cap all the time. Only issue is they are out of your total budget unless you splurge 😊. 
alexberger
852 posts
 
It just possible option.
On the first stage to update the crossover with not expensive and good sounding capacitors.
And if you like result go to the next step of upgrade.
There are a number of options there including use good bypass capacitors.
rocknss
130 posts
 
this
Just one caution: how hard do you drive your speakers? The 300R, 12 watt resistor may get hot when used hard, in place of a 15 watt. Have you considered doubling up in parallel? I would be sure to meet or exceed all voltage and power specs, and match values of resistance or capacitance as closely as possible.

Rather than brand name, consider technology when buying caps. Film and foil is notably better than any metallized product. I like tin foil and styrene film, especially from MIT multi cap - pricey, but worth it in spades. Mills is good unless you have deep pockets.

This is backwards
Two 15ohm 12watt resistor in series will give you a 30ohm 24watt.
You want to parallel resistors to increase wattage.


imhififan's avatar
imhififan
2,102 posts
 
rocknss,

this
Just one caution: how hard do you drive your speakers? The 300R, 12 watt resistor may get hot when used hard, in place of a 15 watt. Have you considered doubling up in parallel? I would be sure to meet or exceed all voltage and power specs, and match values of resistance or capacitance as closely as possible.

Rather than brand name, consider technology when buying caps. Film and foil is notably better than any metallized product. I like tin foil and styrene film, especially from MIT multi cap - pricey, but worth it in spades. Mills is good unless you have deep pockets.

This is backwards
Two 15ohm 12watt resistor in series will give you a 30ohm 24watt.
You want to parallel resistors to increase wattage.
You can in series or parallel resistors to increase wattage!

You can parallel two 60ohm 12watt resistors to get the same result.

P= V x I

Two identical resistor in series, each resistor only see half of the voltage.

Two identical resistor in parallel, each resistor only take half of the current.


flapjack
116 posts
 
@imhififan 

   +1
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