Need help with capacitors *NEWB*

[the727kid 10+ year member]

Hopefully that got your attention, for all the people to come in here and bash caps lol. I need a capacitor for my horns just to protect from turn on pops and incase there is slight clipping going on. They are crossed at 1500hz/24dB so anything around 800hz would probably be more than perfect. They are 8 ohm drivers. Anyone like to tell me how to figure out which uF I need.

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[Sarthos 10+ year member]

So you already have a crossover going to them and you want to add a second one? That's not going to work well at all....gonna shift the phase of your speakers and all kinds of crap like that.

 

[Burton6431 10+ year member]

800hz, isnt that rather low? run active.

 

[Sarthos 10+ year member]

No, it sounds like he has a crossover at 1500 Hz and he wants to use a capacitor to give it additional protection too. Doing that isn't gonna be pretty though, it's gonna really mess with your output. You'd need someone here who is an expert in both electrical engineering AND mathematics to figure this one out.

Or run active, and cut the EQ on those frequencies for your tweeter channel.

 

[Burton6431 10+ year member]

No, it sounds like he has a crossover at 1500 Hz and he wants to use a capacitor to give it additional protection too. Doing that isn't gonna be pretty though, it's gonna really mess with your output. You'd need someone here who is an expert in both electrical engineering AND mathematics to figure this one out.
Or run active, and cut the EQ on those frequencies for your tweeter channel.

electric and math, oh **** dat bye.

 

[helotaxi 5,000+ posts]

He wants them for protection from any DC bias. There are a ton of crossover calculators out there. You're not going to get an intelligent answer on here.

 

[nateberrier 10+ year member]

Run an active crossover. I have a nice OS Yamaha id sell //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Sarthos 10+ year member]

Can you just be more specific on what EXACTLY you want? Do you want to Replace your crossover with a new one which is 24 dB/octave at 8 ohms, or do you want to Add a second protection circuit?

If you want to replace your crossover, that isn't hard. Just run active though, it's easiest. Otherwise give the specs you want on the new crossover.

If you want to add a second protection circuit, you need to replace your crossover. Not only that, you need to custom build a new crossover. I could maybe do some work on figuring out the circuit design you'd need, but it wouldn't be easy to formulate, much less to build.

 

[the727kid 10+ year member]

He wants them for protection from any DC bias. There are a ton of crossover calculators out there. You're not going to get an intelligent answer on here.

I noticed that lol. I found a calculator online. Not even going to worry about how it's calculated.

 

[Sarthos 10+ year member]

So long as you don't plan on using two crossovers together it should work. If you use the cap with your current crossover it'll be no bueno

 

[the727kid 10+ year member]

I don't see why it would make a difference. I was told from the guys directly at Image Dynamics to pick one up.

 

[Sarthos 10+ year member]

You'll see why combining two crossovers doesn't work well once you actually do it. If you have time alignment and a great equalizer you might be able to pull it off. Most likely not. To actually prove why I'd need to know the exact construction of your crossover network, and do a ton of work with differential equations and electrical engineering to know exactly how badly it'll be messed up. But among other things it can put the current delivered to your tweeters out of phase with the voltage delivered to your tweeters, resulting in no watts being delivered to your tweeters and therefore no power. Or it could do the same with your woofers. Hard to say.

 

[the727kid 10+ year member]

I use a MS8.

 

[Sarthos 10+ year member]

Doesn't that have a crossover section built in?

 

[AlterEgo99 5,000+ posts]

He wants them for protection from any DC bias. There are a ton of crossover calculators out there. You're not going to get an intelligent answer on here.

No shit.