Capacitor !,help Me,please....

[mauro]

Please people help me!
I'm having a truoble in capacitor choice.
I have not done direct comparison between they,but i would know which capacitor,suonds warm and natural.
i will put in crossover for morel mdt33 and dynaudio d52af.
The candidates are :
- solen 400v;
- solen 630v;
- audyncap 400v;
- audyncap plus 800v;
- mundorf m-cap 400v;
- mundorf m-cap supreme 800v (no oil);

I would know which give to me a more relaxed suond.

I already seen the Tony Gee cap. test,do not intrest me.

regards.

 

[WmAx]

Unless the capacitor is defective, they will have no discernable differences if the compared/measured capacitance values are the same. The Solens are usually reasonably priced--so they are a good choice. You can get lower priced Dayton film caps from www.partsexpress.com or even go cheaper and use Mylars. I do not recommend electrolytics, however, as their values drift over time and are difficult to match in value due to wild tolerances.

-Chris

Please people help me!
I'm having a truoble in capacitor choice.
I have not done direct comparison between they,but i would know which capacitor,suonds warm and natural.
i will put in crossover for morel mdt33 and dynaudio d52af.
The candidates are :
- solen 400v;
- solen 630v;
- audyncap 400v;
- audyncap plus 800v;
- mundorf m-cap 400v;
- mundorf m-cap supreme 800v (no oil);

I would know which give to me a more relaxed suond.

I already seen the Tony Gee cap. test,do not intrest me.

regards.

 

[Rip Van Woofer]

I, like many others here, do not believe capacitors make any audible difference. And I suspect that, among those who do, each of the units you mentioned will have its fans. You are unlikely to get a conclusive answer.

FWIW, I am using Parts Express "Dayton" film capacitors (like Chris mentioned) in my current speakers and I am happy with them. Any other bipolar capacitor of reasonable tolerance would do just as well but the price and selection at Parts Express was good. The quality of my speakers--any speakers--is entirely due to the design, construction, and driver selection IMO.

Chris is right about electrolytics so I did some editing here!

 

[WmAx]

Any other bipolar electrolytic capacitor of reasonable tolerance would do just as well

I strongly disagree. Electrolytic capacitors are not stabile. They will lose signficant capacitance over the course of a few years. They should never be used in circuits that require a stabile value(such as crossover filter circuits) if the speaker is intended to retain consistant performance over a long period of time.

-Chris

 

[gregz]

Electrolytics have come a long way in longevity and stability. That being said, they suck in crossover circuit applications because they vary so far from the ideal capacitor. Imagine throwing in a mystery box full of restors, a diode, and a capacitor into your circuit and then trying to tweak it. Yuck!

Stick with film capacitors, and go for the cheap ones with impunity as long as the tolerance is acceptable to your design.

 

[toquemon]

I don't understand, so will the Electolytic capacitors of my Receiver collapse in a few years?. I the designers know it, why they use this capacitors in amps?

 

[gregz]

Toquemon, electrolytics have been around a long time and they got off to a bad start that many will never forget. Paper and beeswax?? Today's electrolytics are actually quite long lasting in any but the harshest environments.

But their values do tend to drift under different temperatures as well as with age. That means they're ok for power supplies and such applications where a change of 20% doesn't really impact anything. However, in a precision circuit such as a filter or timer, electrolytics have and always will be no-nos.

It's a matter of the right part for the right job. Amplifiers need banks of electrolytic caps to back up peak current demands, because electrolytics allow you to use BIG values in small packages. That's their strength (besides being inexpensive).

For what it's worth, I'll still use an electrolytic for a first order high pass filter if I'm just protecting a speaker from extremely low frequencies and the crossover point is very far from my working frequency. But when I'm designing critical overlap frequencies between two drivers, you can bet I'm going to use a film capacitor.

 

[Mr.T]

Somehow I tend to agree with gregz, a wax inpregnated film capacitor is a better choice for crossover circuitry and where low frequency circuits are involved.

Electrolytic capacitors longevity and stability in many cases is much shorter than other kind of capacitors, but they do miracles in power supply circuits applications where an AC filtration is needed or where an AC ripple has to be flattened on the otherside of rectifiers and bridge rectifiers.

Electrolytic capacitors also have a tendency of leaking, especially true where heat dissipation in that area is poorly controlled, like in power supply boards or output stages like sound output stages or vertical and horizontal output stages in television sets.

 

[dper]

I'm not an electronics whiz, but I'm trying to restore my mother's Lowrey Organ. Its about 35 years old and I want to replace all the electrolytic caps. There's over a couple hundred of them in there of varrying sizes and descriptions. Can I replace electrolytics with bipolars in this application? Where's a good source to take my shopping list?

 

[surveyor]

Here's a place to look for capacitors of just about any type.
http://stores.ebay.com/JEA-Capacitors_W0QQsspagenameZl2QQtZkm