What would be the advantage over one TH with the same dimensions with two drivers as your dual TH ?
That's an interesting allignment.
if you reverse one driver the "average driver" is a flat piston.
A downside for PA mostly would be that if one driver stops you effectively get two off-set horns.
An upside could be that you can use different sized drivers (see were that takes you).
Makes me wonder:
You could use two drivers in a single tapped horn and have the other side of the diaphragm load something else, say a closed box (or a reflex) to change compliance / excursion. Differerent enclosures could mean you could tweak the ratio of the throat : mouth level/ contribution?
Thinking out loud, it would diminish the tapped horn double Sd-effect but would result in endless days of experimenting, possibly finding the next step.
Best regards Johan
if you reverse one driver the "average driver" is a flat piston.
A downside for PA mostly would be that if one driver stops you effectively get two off-set horns.
An upside could be that you can use different sized drivers (see were that takes you).
Makes me wonder:
You could use two drivers in a single tapped horn and have the other side of the diaphragm load something else, say a closed box (or a reflex) to change compliance / excursion. Differerent enclosures could mean you could tweak the ratio of the throat : mouth level/ contribution?
Thinking out loud, it would diminish the tapped horn double Sd-effect but would result in endless days of experimenting, possibly finding the next step.
Best regards Johan
One advantage of this is that you can have a ...straight tapped horn if you like.
That is not possible with a normal tapped horn.
The math for this....is way out of my league. Time to learn akabak !
That is not possible with a normal tapped horn.
The math for this....is way out of my league. Time to learn akabak !
Isn't that a downsite that counts for almost all PA subs with multiple drivers and combined spaces?!
You can do it in Hornresp.
Look at your "unfolded" diagram. Cut it along the diagonal partition. Each half looks just like the schematic diagram of a tapped horn in Hornresp, right?
Now double its width (cross sectional area) and use 2 drivers.
In other words, a "conventional" tapped horn with two drivers and the same dimensions will perform identically (at least in simulation) to your design.
I wouldn't use something like that for large-scale PA unless folded in order to have both exits adjacent. In its straight form it would make a nice sub for home use laying on the floor directly at the wall. Or maybe in front of the stage of a small venue. And yes - you should be able to bulid this in a quite compact fashion with push-pull mounted drivers.
Regards
Charles
Regards
Charles
I want to build this with 4 PA drivers, folded. That will make a nice party sub 🙂).
Here is one more advantage over an ordinary tapped horn with 2 drivers. You have room 2 more now!
BDW check this plot 🙂
Here is one more advantage over an ordinary tapped horn with 2 drivers. You have room 2 more now!
BDW check this plot 🙂
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Don't want to spoil any fun, but maybe you should consider the time/distance between the two drivers and the corresponding exit...
I also thought about this arrangement, lately.
The front wave of the driver has no way of knowing if the back wave is coming from its own back (then you must fold or bend the tunnel) or from of another driver instead. As long as this wave is the same the result is the same.
This is true for this design and the only specific thing is that you do not need to fold if that is important for whatever reason. And when you fold, then it may turn out in a slightly simpler construction than two independent TH's of the same (acoustical) geometry.
So this might be a good idea to try when there are specific needs, otherwise net benefit is IMHO doubtful.
- Klaus
The front wave of the driver has no way of knowing if the back wave is coming from its own back (then you must fold or bend the tunnel) or from of another driver instead. As long as this wave is the same the result is the same.
This is true for this design and the only specific thing is that you do not need to fold if that is important for whatever reason. And when you fold, then it may turn out in a slightly simpler construction than two independent TH's of the same (acoustical) geometry.
So this might be a good idea to try when there are specific needs, otherwise net benefit is IMHO doubtful.
- Klaus
No, you don't have more room. You will need the same interior volume as you would for a conventional tapped horn with a total of 4 drivers.
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