Speaker crossover mod. Your advice?


I'm considering modding the crossovers of my Focal 1027s. Specifically, I am thinking about replacing the capacitor associated with the tweeter. I have received some helpful advice from another A'gon member who has done a similar mod to his crossovers (on a different model speaker from the same manufacturer).

I would greatly appreciate any suggestions from folks who have experience with this sort of thing. In particular, what sort of improvements can be achieved with this kind of mod? Any thoughts on which caps to use? Any common mistakes I should avoid? Is the whole thing a bad idea?

Thanks for your input.

Bryon
bryoncunningham
I hate to break the news to you BUT the best crossovers is NO crossovers AT ALL ! Crossovers just degrade the sound !
Hi Hifisoundguy,
Go ahead and get some Focal 1027's, remove the crossovers and let me know how it goes.
Hifisoundguy... By that you mean a single "full range" driver.

Sorry to rain on your parade, but full range drivers have a mechanical crossover due to cone breakup. The dust cap and innermost portion of the cone are the tweeter. Such a mechanical filter is difficult to design, hard to manufacture consistently, and prone to wear-out change.
Hi Bryon,

have some new infos for the 1027 BE fans. Last week I added the Yamaha RX-V2067 AV Receiver to the equipment and used the YPAO calibration function. It complained, that the phase of the 1027 would be wrong connected, but this was not the case. So I asked my self, why does the software report this error. Since I had made fotos of the crossoverboard from front and back sides incl. the wiring I took a look at it. And what surprise, the minus pol of the input terminal is connected to all drivers plus pol except the mid driver. In my opinion, this is the reason, why voices do sound thin and wider than usally experinced.
The YPAO SW is able to calibrate reflection and frequency and so, does equalize this unusual turns in phase.
Since your fotos do show the same crossover board with the same wiring, this is not a factory fault. That is the way focal want let the LS sound, but as reported doesn't satisfy me fully.
I turned the polarity at the input terminals and calibrated again. The error diappeared. Voices are now more in forground and not so thin, the sound not so bright and not unnaturally wide.
The RX-V2067 did neutralize bassmodes of the room and made slight modifications to the frequency response, to have it more linear. With this setup I am now very happy with the focal 1027 BE.
Would be intereseted to here, if anyone experienced the same or could retrace it.

Best Regards
Hi Byron, what was the result of the cap replacement in these speakers? interested to know your results

Thanks
Kris