Speaker crossover mod. Your advice?

Hello Bryon,

I have a Focal 1027 BE spreaker, which is simular to your 1027 S. I like the detailed sound very much, but what I am dissatisfied with, is the midrange. Its to thin and lightweight.
So I am thinking of a modification and found this thread.
I analysed the crossover circuit. It has as your 1027 S, the same layout, board and parts except C1 for the beryllium tweeter section, which has 3.9uF instead of 3.6. The inductors (winding, size) looks very much the same.

Since it is reported by other users, that the sound of the 1027 S is warmer and more filling especially in the midrange, I would like to check, wether the sound can be adapted to the 1027 BE.

Mid and tweeter have on both speakers the same crossover frequency, which is about 2.2 kHz. So this can not be the difference. The used mid chassis in the BE version is Focal 6 W 4361. Can you tell me, which one is build in the 1027 S (top chassis of the speaker)?

Either they used different mid chassis or they modified the inside of the box. Maybe there is no path through below the mid or tweeter to the woofers (closed chamber). Did you make photos from the inside or do you remember how it looks like?

Sorry for my poor english, hope you understand it.

louk

Hi Louk - I have the same speakers that you have, the 1027be.

I'm not sure I understand your question. Are you asking about the crossover, the drivers, or the enclosure?

Bryon

Hi Bryon,

in your first post on top you wrote in the first sentense: "I'm considering modding the crossovers of my Focal 1027s".
So I thought you have the 1027 S version. Then this is a misunderstanding of me. I was questioning for the differences of both (BE and S version) to adapt the midrange design of the 1027 S to the BE. This is supposed to be more present than on the BE and results in a more round and warm sound. But since you have also the BE, you can't answer my question. What a pity.

louk

I haven't read all the posts, so- someone may have already mentioned the sonic benefits of observing the directionality of film caps. Most of the better ones are marked, in some way, as to which lead is connected to the outer foil. Good tips, especially(in your case) point three, here: (http://www.audience-av.com/capacitors/a_applications.php)

Louk - The "s" in the first sentence of my post was simply meant to be plural, as in "my Focal ten twenty sevens." I had forgotten that Focal made a speaker designated 1027S. Sorry for the confusion.

In any case, I do indeed have the 1027be, and I can say that I don't have the same problem in the midrange that you are describing. I don't doubt what you are hearing, but I wonder if there's an issue elsewhere in the system. I have found that the 1027be is rather revealing of issues in upstream components.

Bryon