Crossover advice please

Guymo

Member
2010-10-05 6:39 am
Hi there

Im after some advice on 2 way crossovers. this is my first build so please keep explanations simple!

I am using:

tweeter:
response ribbon tweeter
nominal impedance 6 ohm
sensitivity 92db
it is recommended to be crossed over at 2500hz

Woofer:
response 6" kevlar woofer
nominal impedance 8ohm
sensitivity 85db

if you need more information i can scan the info sheets for frequency response charts and impedance charts etc

i was thinking i would do a first order crossover due to simplicity but i dont quite understand how much higher than the recommended crossover frequency i would have to go .Its lowest range is 1.8khz and i dont want to damage them by putting low frequency through them. The woofer appears to have rather varied response after 2 to 3khz as well.
also i dont quite know what i would have to do to balance up the sensitivity of the speakers. i was thinking an l-pad would do the trick but if anyone has better suggestions i would like to hear.
 

Guymo

Member
2010-10-05 6:39 am
the 2nd order crossovers have a steeper cutoff for frequency response as i understand it, but what is the difference between the types?
Butterworth
Linkwitz Riley
Bessel
which one is best for my application and why?
and as i understand it these put the tweeter out of phase so you have to swwitch the positive and negative dont they?
 

kbgl

Member
2010-04-03 1:25 pm
the 2nd order crossovers have a steeper cutoff for frequency response as i understand it, but what is the difference between the types?
Butterworth
Linkwitz Riley
Bessel
which one is best for my application and why?
and as i understand it these put the tweeter out of phase so you have to swwitch the positive and negative dont they?

With a real world crossover, sometimes you just take the slopes you can get. Working with a drivers natural response, you add filters to shape the response. With luck, you can get the drivers close to being in phase at the x-over point so that they add to make a flat response. In general, steep slopes allow for greater power handling for the tweeter, and can help with breakup issues of the woofer.

The tweeter can be padded using two resistors. In this case, probably two 5 ohm resistors would get you in the ballpark.
 

tinitus

diyAudio Moderator R.I.P.
2005-11-24 1:47 am
With a real world crossover, sometimes you just take the slopes you can get.

thats one way of looking at it :p
 

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