Horizontal Ripole?

Hi,

Yes, cone sag might be the only issue, apart from that I can´t see any reason why a horizontally "Ripol" shouldn´t work. By stacking multiple drivers, you could make a very small arrangement with large Sd. This has been done in a commercial speaker together with a Tangband 8"FR on top, but I don´t remember the name. Peerless´ LAT woofer modules were of the same category, and there is a little bit of info around, but according to my knowledge they are not made anymore.

All the best

Mattes
 
By stacking multiple drivers, you could make a very small arrangement with large Sd. This has been done in a commercial speaker together with a Tangband 8"FR on top, but I don´t remember the name. Peerless´ LAT woofer modules were of the same category, and there is a little bit of info around, but according to my knowledge they are not made anymore.
What you say is correct, however, in general the distortion performance and LF extension (Fs, Qts) of small(er) driver is less suitable than larger ones for bass, and this applies just the same to a Ripole.
 
To put it simply, you'll need to swap the drivers regularly so the up facing unit gets switched out for the down facing unit every year or so. That way the suspension on both units doesn't get a chance of sagging from sitting in the same way, facing in either direction for a long time.

I honestly don't think its too much of a potential problem as long as you keep an eye on both drivers every once in a while. I have downfiring 18s in my HT subs and they don't show any signs of sagging after a few years. My drivers are PA type, so the stiffer suspension may make them less susceptible to cone sag.
 
Exactly. My dipole subs have a Peerless xls 12 mounted horizontally. Stiff suspension but also large moving mass. After 15 years or so being in that position without rotating, I have no idea how much sagging there is. But they still work perfectly so who cares. Might take the grill cloth off to check after reading this thread. If it's bad, I'll place them upside down and all will be fine for the next 15 years :)

Might have to paint the bottom in that case 🤔
 
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You sure do not.
You do not want drivers to sag, but they will. To unsag them, you rotate them 180 degrees.
It does not matter if woofer sags in or out of voice coil, its detrimental.
To avoid all this, build a vertical ripol.
Or do not care abour sag.
I think you do not get what try to communicate.
If you rotate the whole Enclosure both woofers go in the opposite direction of before and thereby counteracting the sag they experience previously.
I would never mount woofers horizontally but it was the question of the thread starter.
 
What you say is correct, however, in general the distortion performance and LF extension (Fs, Qts) of small(er) driver is less suitable than larger ones for bass, and this applies just the same to a Ripole.
Hi Charlie,

Right, and if you go that way, you´ll have to add more drivers for bigger Sd.
Right, and that´s why I personally use an 18" driver for bass.

All the best

Mattes
 
There are a multitude of omnidirectional speakers sold that have horizontal speakers.
Has been and always will be.
Especially higher Qts bass speakers that are adequate for Ripoles have very little to no sag.
Even if it sags 1/2mm a bass speaker that has at least 7mm xmax cares very little about it.
We are not talking low xmax mid bass speakers here.