MT122 - Crossover Thresholds/Suggested Electronics

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Crossover Thresholds/Suggested Electronics

Printed From: Speakerplans.com
Category: Plans
Forum Name: MT122
Forum Description: Discussion / Questions about the MT122
URL: https://forum.speakerplans.com/forum_posts.asp?TID=11746
Printed Date: 27 March 2026 at 8:45am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com

Topic: Crossover Thresholds/Suggested Electronics

Posted By: nanders
Subject: Crossover Thresholds/Suggested Electronics
Date Posted: 14 September 2007 at 6:34pm

Hi all,

I am currently building a pair of 122s and am wondering about x-over frequencies.

What frequencies do people recommend crossing the 12"s into the 2"?
Should there be a filter for anything lower than a certain threshold?

I was hoping to use passive x-overs initially.
Can anyone recommend suitable electronics for this?
(planning to use P.Audio sn12b's and BMD750)

Thanks in advance!

BTW the horn specified in the plans is the 2723. Yet all the examples I have seen on this forum show a much wider horn unit, possibly a 2380?

Is this to increase high-end dispersion?
What do people think of this change?