Question about vertical 2x12's and other "improved" guitar cabs...

Guitar cabs both you and your audience can hear better.
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nosajwp
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Question about vertical 2x12's and other "improved" guitar cabs...

#1 Post by nosajwp » Tue Oct 30, 2018 8:52 am

I appreciate and understand the design problems that the XF212 is intended to overcome.

Are there any technical benefits to an XF212 compared with a basic vertical 2x12? What about if the vertical 2x12 has the upper speaker angled back slightly?

Any technical opinions on something like this (http://www.soundenhancer.com/news_updates.htm), that claims to increase cab output by redirecting the rear side sound waves back towards the front?

I've also seen cabs sort of like these...the Port City Wave, the Dr. Z Z Best (https://drzamps.com/product/z-best/), all sorts of "Thiele" guitar cabs etc. Any technical benefit to any of these?

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Bill Fitzmaurice
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Re: Question about vertical 2x12's and other "improved" guitar cabs...

#2 Post by Bill Fitzmaurice » Tue Oct 30, 2018 10:46 am

XF212 has wider dispersion than a vertical 2x12. The tilt back of an upper speaker helps the player hear it if he's close to the cab, it does nothing as far as anyone else is concerned. The Enhancer is BS. The result is the creation of a rear loaded folded horn, which dates back to the 1930s. What it claims to do it can't, as only low frequencies will pass through the horn. 'Theile' cabs are ported, nothing special there. By and large guitar doesn't go low enough to benefit from the low frequency output of a ported cab. That site is full of BS too. All three of these claims, Placed vertically, the Z Best delivers a tuned, focused sound yet has the airy qualities associated with open back cabs due to the front port. When placed horizontally, you pick up more low end as the front port is then coupled with the floor. This is a long throw cabinet that will get the sound to the back of the room are nonsense.

nosajwp
Posts: 16
Joined: Mon Oct 07, 2013 11:23 am
Location: Winston-Salem, NC

Re: Question about vertical 2x12's and other "improved" guitar cabs...

#3 Post by nosajwp » Wed Oct 31, 2018 12:34 pm

That's what I was thinking.

Some people claim that the "Thiele" cabs redirect the rear sound of the speaker forward, to boost the efficiency and output of the cab when it mixes with the front sound of the speaker. Safe to assume that these claims are false?

Also, if someone were interested in building an XF, what kind of advice might you have to help them choose open or closed back, and when you might want to use one over the other?

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Bill Fitzmaurice
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Re: Question about vertical 2x12's and other "improved" guitar cabs...

#4 Post by Bill Fitzmaurice » Wed Oct 31, 2018 1:00 pm

nosajwp wrote:
Wed Oct 31, 2018 12:34 pm
Some people claim that the "Thiele" cabs redirect the rear sound of the speaker forward, to boost the efficiency and output of the cab when it mixes with the front sound of the speaker. Safe to assume that these claims are false?
Half true. Port output does add to the output from the front of the cone. However, what comes out of a port is low frequencies, and being long wavelengths they radiate omni-directionally, so it does not re-direct the rear radiation forward. For that matter the result will be the same no matter which direction the port faces. It's just a ported cab, like any other ported cab. Using the term Theile is an attempt to make it seem special. The rest of the audio community stopped using the term 'Theile' with respect to ported cabs designed using Theile/Small specs after that practice became the rule rather than the exception. That would have been around 1980.
Also, if someone were interested in building an XF, what kind of advice might you have to help them choose open or closed back.
You don't have to choose. The rear panel is removable, leave it attached or take it off, whichever sounds best to you.

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