X10, X12, X15 and XM15 - X12 - Passive crossover?

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X12 - Passive crossover?

Printed From: Speakerplans.com
Category: Plans
Forum Name: X10, X12, X15 and XM15
Forum Description: Discussion / Questions about the X10, X12, X15 and XM15
URL: https://forum.speakerplans.com/forum_posts.asp?TID=11607
Printed Date: 27 March 2026 at 11:09am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com

Topic: X12 - Passive crossover?

Posted By: LK
Subject: X12 - Passive crossover?
Date Posted: 04 September 2007 at 11:14am

Hi!

I'm planning on building some X12 mid tops using the recommended drivers on the plans.

Can anyone recommend a suitable passive crossover to use? Not sure whether to Bi-amp or to just build in a passive crossover and run them on one amp.

Any suggestions welcome!

Cheers :)

Replies:

Posted By: ceharden
Date Posted: 04 September 2007 at 12:06pm

Passive crossover is slightly more difficult for the X12 because of the dual mid driver. You'd need to design one for 4Ohms on the low side and 8 Ohms on the high side.

Can be done however....

Posted By: LK
Date Posted: 04 September 2007 at 2:44pm

Aaaah yeah, of course... forgot about that...

I suppose using 2 amps and an active crossover is more efficient anyway...

What kind of crossover frequencies do these cabs take?

Posted By: ceharden
Date Posted: 05 September 2007 at 10:16am

I think that once you get up to cabs with the size and power handling of the X12 it's worthwhile running them active. You have much more freedom with the crossover and can get better integration between the mids and tops.

Mine aren't loaded with the recommended drivers but I'd suggest starting with a crossover point around 1.2kHz and working from there. I'm not sure how low the suggested HF horn will go but I can run fairly safely down to about 900Hz. Within reason, the lower the better but without endangering the HF driver.