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WTB 10 uF crossover capacitors

Wanted to buy
Ocasionaly when you do that you may have a small problem as an electrolitic will have
a higher esr than a film cap. At least I saw one famous designer found that when he changed
from an electrolitic to a film cap he had to add a small resistor something in the ramge of
1 to 2 ohmsin line with the new cap .
 
Any particular brand you were looking for? I may have some Solen or Dayton around; some higher end pairs as well.
Woody's post got me interested in the change in ESR. I had never considered it or seen it mentioned before.
I tested an NPE, a Dayton, an Mcap Supreme, and a Jantzen Z Cap.
At 1k Hz the NPE was .75 Ohms, the rest were .55. At 10k Hz all were right around .19 Ohms.
Big difference on the low end. At 120 Hz the NPE was 4.64 Ohms with the rest around .83.
Looks like if your cap is in a tweeter section or top of a mid-range the difference should be insignificant.
Take my non scientific, untrained observations with a shovel full of salt :)
 
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Any particular brand you were looking for? I may have some Solen or Dayton around; some higher end pairs as well.
Woody's post got me interested in the change in ESR. I had never considered it or seen it mentioned before.
I tested an NPE, a Dayton, an Mcap Supreme, and a Jantzen Z Cap.
At 1k Hz the NPE was .75 Ohms, the rest were .55. At 10k Hz all were right around .19 Ohms.
Big difference on the low end. At 120 Hz the NPE was 4.64 Ohms with the rest around .83.
Looks like if your cap is in a tweeter section or top of a mid-range the difference should be insignificant.
Take my non scientific, untrained observations with a shovel full of salt :)
When using a 10uF MKP film cap replacement add 3.3Ω 10W resistor in series to the cap for an EPI 100 to sound best balanced.
 
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