Going Bordeaux tops. Couple of questions ...

I really want quality AMTs in my next speakers. So I am purchasing the top portions of the Bordeaux, but making a couple of changes. I need to know if those changes are possible, without redesigning the xover.
I want to use a larger sealed, or ported cabinet, and do away with the dipole set up. While this will not necessitate a change in xover from mid to tweeter, in regards to frequency or slope, BUT will it change the relative volume of the midbass to tweeter transition? Wont it make the woofer now louder, upsetting the balance?
My other question is, other than killing the back wave for a more expansive soundstage, will the xover need any change due to the midbass no longer being opened in the back? The overall tone should not change due to this, should it?
Thank you
 

AllenB

Moderator
Paid Member
2008-10-18 11:31 am
Potentially it could make a fair amount of difference. Fortunately the configuration you want to go with is straightforward to reduce the complexity of a crossover redesign.

Are you going to put the tweeter in a separate rear enclosure too?
 

jholtz

Member
2003-10-31 3:11 am
Midwest
I really want quality AMTs in my next speakers. So I am purchasing the top portions of the Bordeaux, but making a couple of changes. I need to know if those changes are possible, without redesigning the xover.
I want to use a larger sealed, or ported cabinet, and do away with the dipole set up. While this will not necessitate a change in xover from mid to tweeter, in regards to frequency or slope, BUT will it change the relative volume of the midbass to tweeter transition? Wont it make the woofer now louder, upsetting the balance?
My other question is, other than killing the back wave for a more expansive soundstage, will the xover need any change due to the midbass no longer being opened in the back? The overall tone should not change due to this, should it?
Thank you


Curt is the crossover guru of our team but I'll throw out some thoughts. Everything you're changing will affect the crossover. You'll be starting over. 3-ways are designed from the bass driver up. BTW, it's not a dipole it's an open back mid transmission line that has a controlled rear wave. It will also require changes to the crossover to balance the mid/tweeter to the bass driver.

As far as tone, it depends on how much the crossover is changed and how it affects voicing. Check with Curt for his input but be prepared for a pretty major alteration.

HTH

Jim
 
Oh boy. I was afraid of that. Technically, we planned on eliminating the bass xover section, and making it a simple two way. That is all we were after. Oh well. Guess it isn't in the cards. I'm still building a pair of SNR-1s. So I will have my AMT after all. Just not the Accuton. I'm sure I'll be happy with them!