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Multi-Way Conventional loudspeakers with crossovers

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Old 3rd April 2005, 05:49 PM   #1
Grahamt is offline Grahamt  Canada
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Default Dual tweeter center channel?

I am going to build a center channel, and I have several extra tweeters.

I was going to do an MTM, but I could build an MTTM. I cant find much info on this.

I am thinking of something similar to this.

Click the image to open in full size.

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Do I approach this as I would a regular MTM?

The goal is wide dispersion and clear dialogue.

I have SW to do measurements and crossover simulations.
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Old 3rd April 2005, 06:02 PM   #2
Zaph is offline Zaph  United States
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Generally, it's a bad idea. However, it can be done. The sole benefit is slightly higher power handling and lower crossover point. There was a discussion on Madisound a while back.

The wrong way to do it is to simply parallel the tweeters. The right way to do it is described by Paul Hilgeman below.

http://www.madisound.com/cgi-bin/dis...gi?read=335861

I've used the same concept on midwoofers for a sideways MTM center channel with limited baffle step but better lobing tendencies.

Generally however, it's better to use a small dedicated midrange below the tweeter, such as a Morel MDM55, a popular choice in a center channel W-T/M-W config.

Axiom speakers use dual tweeters in the worst way possible. See below.
Click the image to open in full size.
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Old 3rd April 2005, 06:25 PM   #3
Grahamt is offline Grahamt  Canada
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Thanks John,

I think I will stick with the traditional MTM. That will be enough of a challenge.
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