I'm contemplating an adaptation of Scott Lindgren's voigt pipe for the Mark Audio CHN110, last one on this page: https://www.markaudio.com/wp-content/uploads/2019/12/CHN110-with-plans.pdf
Could it be worthwhile to make a b/dipolar version by building a cabinet double the width (i.e. two identical, separate pipes side by side) and mounting a second driver on the back of the 'additional' cabinet?
Why? I like the 3D effect of bipole /dipole speakers + need the paralleled drivers' extra sensitivity + it would tackle baffle step and improve bass output.
I would place the rear driver as low as possible (see https://www.hifizine.com/2010/06/the-controlled-pattern-offset-bipole-loudspeaker/), but how low can I go without messing up the voigt pipe's operation?
Given the cabinet's fixed dimensions, could I just play with the vents' length and diameter to tune bass?
Lastly, I could wire in a bipole/dipole switch to hear which works best.
Curious whether this seems feasible...
Simon
Could it be worthwhile to make a b/dipolar version by building a cabinet double the width (i.e. two identical, separate pipes side by side) and mounting a second driver on the back of the 'additional' cabinet?
Why? I like the 3D effect of bipole /dipole speakers + need the paralleled drivers' extra sensitivity + it would tackle baffle step and improve bass output.
I would place the rear driver as low as possible (see https://www.hifizine.com/2010/06/the-controlled-pattern-offset-bipole-loudspeaker/), but how low can I go without messing up the voigt pipe's operation?
Given the cabinet's fixed dimensions, could I just play with the vents' length and diameter to tune bass?
Lastly, I could wire in a bipole/dipole switch to hear which works best.
Curious whether this seems feasible...
Simon
It will work. Making it 2x as wide as opposed to just doubling the xSection means you are minimizing the bi-pole dip.
In this box the Zd is critical. Do not move the drivers or you will kill some bottom.
Wiring in dipole is a waste of effort IMO.
dave
In this box the Zd is critical. Do not move the drivers or you will kill some bottom.
Wiring in dipole is a waste of effort IMO.
dave
Thanks Dave! Just curious: why not dipole here?
Edit: Meanwhile in another forum, I see you already answered that one: "When you wire as a dipole, you have 2 drivers essentially pretending to be a single driver on a board, bass cancels, the box does little." https://www.audiocircle.com/index.php?topic=152023.0
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There is little point. You are using 2 drivers to (poorly) emulate an OB with a single driver.
dave
dave
Cheers Dave - I'm really looking forward to building this one. Ready for spring. And summer.