Ultimate Open Baffle Gallery

[Sjef]

using a driver with a Q factor higher than 0.7~1.0 is essentaily applying mechanical EQ.

 

[hitsware]

using a driver with a Q factor higher than 0.7~1.0 is essentaily applying mechanical EQ.

OK .... No electrical EQ .........

 

[CLS]

Issues:

1. High Q and also high quality woofers are rare and/or expensive.

2. There's still dipole loss to compensate. In most cases, you actually need 12db/oct slope in the signal chain to make it flat on speaker's output.

 

[freddi]

here's a 15" P-Audio SN15c coax woofer with qts ~0.37 on a 2' wide by 3 foot tall baffle - subjectively there was adequate bass and good control

(hi Hitsware!)

An externally hosted image should be here but it was not working when we last tested it.

 

[CLS]

My recent build, 4-ch in Hafler circuit (with outer speakers playing differential signals), all dipole except the up-firing super tweeters for the top octave.

Karlson style lens is added to the HF unit later:

More info here:
http://www.diyaudio.com/forums/full-range/271011-rockin-kazba-dipole-k-aperture-z-baffle-dipole.html

 

[hitsware]

> subjectively there was adequate bass and good control

Hey ! .... Freddi

YES ! It's sometimes mind-boggling how perception transcends theory !

 

[Face]

> subjectively there was adequate bass and good control

Hey ! .... Freddi

YES ! It's sometimes mind-boggling how perception transcends theory !

I believe personal preference also plays a large role here. That kind of response would sound thin to me on my system.

 

[hitsware]

>There's still dipole loss to compensate.

Not if you use high enough Qts
AND!
High enough Fs
Assuming high enough Qts :
Only if Fs > baffle rolloff and desired F3 is compensation needed.

 

[hitsware]

> High Q and also high quality woofers are rare and/or expensive.

Not if you understand that "Q" stands for "quality"

 

[hitsware]

>There's still dipole loss to compensate.

Not if you use high enough Qts
AND!
High enough Fs
Assuming high enough Qts :
Only if Fs > baffle rolloff and desired F3 is compensation needed.

edit: Only if Fs is lower than baffle rolloff ..........

 

[gainphile]

PICS please ...

 

[gainphile]

"SoulSonic"

 

[gainphile]

"Orion"-esque Planar OB

www.serenityacoustics.com/products/thesuper7.html

An externally hosted image should be here but it was not working when we last tested it.

And please no more 'theories...' ... we wanna DROOL

 

[hitsware]

Drool On !!!!!!!!!!!!!!!!

 

[MITsound]

"SoulSonic"

Wow!
That's beautiful !!

 

[TNT]

No, it's not for cancelling vibration force.

It's for making the dipole path length larger - increasing the distance of the front/rear wave cancellation.

The air between 2 woofers moves back and forth as a bulk without the behavior of soundwave. So, it should be quiet here. But there could be a weird sense of airflow. No problem in the normal listening position.

If the woofers operate in the same polarity, it'd become a quadrupole. For producing bass, the efficiency is too low.

So the cones move in the same direction (it will not cancel forces)?

//

 

[matejsirk]

Wow!
That's beautiful !!

Yes, they are beautiful.

Made in Slovenia, by Miro Kranjec. Link of other products: SoulSonic Speakers

 

[superlian]

Dose anyone have experience with Acoustic Elegance TD18H+ in ripole?

 

[Sumanta]

Here is mine one.
Philips HQ48002 for mid and high with a helping Philips tweeter on top facing up.

Bass is by Ahuja 15 inch AS15X200 mounted in a Ripole cabinet.

 

[norman bates]

5 x 12" focused OB arrays (unknown driver)



found on post 309
http://www.diyaudio.com/forums/mult...-sound-single-loudspeaker-31.html#post2907305

he last posted in 2011...............