A Fantastic Three Way

amirmk

Member
2004-11-03 2:24 pm
Israel
Today i listend to the Orpheus by Audes. It's a three way speaker that can be seen here

After listening to Eric Dolphy's "Live at Five Spot Cafe'", I told the owner that i've found my next project. I have about 2,000USD after selling my Thors, nothing wrong with them, I just like a change once in a while. I've decided on woofer, i'll be using the same tweeter as the original (Seas Millenium) and the same 6.5" woofer made by Audes. For the 10" woofer I'll use Seas Excel.
I'm a skilled woodworker, so I'd just copy the original cabinet after making some measurments.
I'd like to ask you about Crossover design. What Kind of XO would you recommend for such speaker?

Thank you.
[I apologize for my english, as it is not my strongest language]
 

amirmk

Member
2004-11-03 2:24 pm
Israel
That's why i ask you guys, I ofcourse can't open them, so i'd like to design couple of alternatives, or use alternatives that you'll suggest, and try to match the sound. they use a 1st order for the bass, a 1st and 3rd for mid and 3rd for treble, as their website states.
 
amirmk said:
That's why i ask you guys, I ofcourse can't open them, so i'd like to design couple of alternatives, or use alternatives that you'll suggest, and try to match the sound. they use a 1st order for the bass, a 1st and 3rd for mid and 3rd for treble, as their website states.

why not go active and figure it would from trial and error??? then convert your findings to passive xovers?

mess with it actively to you hit that "audes sound" :)
 
re crossover

With a typical mid driver at that crossover frequency, the 1st. order crossover would in fact more resemble a 3rd. order one when you take the drivers lower roll off into account.
A Vifa 130 type of driver for instance will have a close to ideal 3rd. order responce and an f3 of around 150Hz.when put in a box of around 2.5-3litres, and fed from a 1st. order network, if this is passive it should have a notch filter.
I don't know the parameters of the driver you propose to use, but if it is designed as a dedicated midrange driver it won't vary that much.
 
Your clone attempt will probably want a higher order filter on the woofer to mid XO. I'm guessing that their woofer has a really early rolloff to get away with a first order electrical XO and not muddy things up side firing. With the Excel driver's flat response to 1,000, I'd shoot for 4th order Linkwitz-Reilly. (remember that you may not need to use a 4th order electrical filter on the mid's high pass to get 4th order acoustic response. Measurement is your friend.)

BTW, how are you planning to get hold of one of Audes' proprietary midranges?
 

Ola

Member
2002-12-28 10:11 pm
Estonia
>Ola, what do you mean by that?

They listen and change crossover components, sometimes changes are quite minor. There is (was?) an excellent description obout loudspeaker voicing - the Ariel story. I'm afraid it's gone from Internet, but if You mail me, I have it.

To make a speaker that sounds the same, You must know exact values of the coils and caps, including manufacturer of the caps.