Simplexx 212: 3012HO vs. the Beyma 12WR400?

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groovaholic
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Simplexx 212: 3012HO vs. the Beyma 12WR400?

#1 Post by groovaholic » Wed Jan 03, 2018 4:35 pm

I've previously owned an Omni15 TB (built with the 212 option) and while it sounded great, it seemed to lack some of the "in your face" feel of a direct radiating speaker.
So I just purchased plans for a Simplexx 212 and I’m trying to assess which driver will best suit my tonal preferences.
(Which are: thick and punchy, but clear and defined -- with good dispersion off-axis)

There are a couple folks who have built the S212 with the 3012HO, and that is the first driver I’m considering.
But I’ve also heard lots of good things about the Beyma 12WR400 – and it suits the specifications that Bill calls for in the plans.

I’ve loaded T/S specs for both drivers into WinISD.
For the cabinet, I’m figuring approximately 4.75 cu ft.
Based on the area and length of the ports, I’m getting a tuning of roughly 47 Hz.

Given that, the two drivers look similar, although the Beyma has a slight hump at 60 Hz and extends a little bit lower.
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From there, I’m departing objective data and going to subjective preferences – once removed.

Initially, I was thinking of building the Chris Cole 212.
After hearing YouTube videos of his cabinet with the DeltaLite 2512 and the Beyma 12WR400, I definitely preferred the tone of the Beyma.

Why that’s germane to this question is because I’ve heard the 3012HO described as tonally similar to the Deltalite 2512, but with higher XMax and power handling.

Aside from the obvious (weight) what are the advantages/disadvantages of the 3012HO vs. the Beyma 12WR400?

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Bill Fitzmaurice
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Re: Simplexx 212: 3012HO vs. the Beyma 12WR400?

#2 Post by Bill Fitzmaurice » Wed Jan 03, 2018 5:05 pm

groovaholic wrote:
Wed Jan 03, 2018 4:35 pm
I’m trying to assess which driver will best suit my tonal preferences.
(Which are: thick and punchy, but clear and defined -- with good dispersion off-axis
Thick and punchy are subjective terms, and mean different things to different people. All twelves will have similar off-axis dispersion. Where those drivers mainly differ is in the upper mids, look at the charts on their respective data sheets. The 3012HO has a decided response peak at 2.5kHz, the Beyma does not.
I never judge a speaker by a youtube video, there are far too many variables involved, not the least of which being what you're listening to them on.

groovaholic
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Re: Simplexx 212: 3012HO vs. the Beyma 12WR400?

#3 Post by groovaholic » Wed Jan 03, 2018 7:46 pm

That peak at 2.5k is what had me wondering about other drivers, so the Beyma might be a better option for me.

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Bill Fitzmaurice
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Re: Simplexx 212: 3012HO vs. the Beyma 12WR400?

#4 Post by Bill Fitzmaurice » Wed Jan 03, 2018 9:27 pm

That peak at 2.5kHz is common to most factory made bass speakers, because most are Eminence loaded.

groovaholic
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Re: Simplexx 212: 3012HO vs. the Beyma 12WR400?

#5 Post by groovaholic » Thu Jan 04, 2018 8:16 am

Thanks Bill!
Seems like you're steering me toward the 3012HO.

I re-read the section of the plans on the crossover.
Since the hand-off between the 12" and the tweeter is right around 2.5k, I'm guessing that the rising midrange of the Eminence drivers was a planning factor in the crossover design.

So I think I'll respect the opinion of the designer!

Thanks again...

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Bill Fitzmaurice
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Re: Simplexx 212: 3012HO vs. the Beyma 12WR400?

#6 Post by Bill Fitzmaurice » Thu Jan 04, 2018 8:50 am

The crossover to the BGH-25 is at 2kHz. That has nothing to do with the woofer axial response, it's because off-axis dispersion at 2kHz from the BGH is much wider than from any twelve. The BGH-25 is recommended for bass because bass doesn't need to go higher than 8kHz, and most bass amps deliver lots of hiss above 8kHz.

groovaholic
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Re: Simplexx 212: 3012HO vs. the Beyma 12WR400?

#7 Post by groovaholic » Thu Jan 04, 2018 10:07 am

Ahh...great to know!
The 3012HO wouldn't be beaming that 2.5k spike because the cab would already be crossed over to the BGH-25 by then...

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