Hello Friends
I want a Subwoofer thats small footprint but still creates decent pressure in a medium size room. Say if I use SB Audience Open BAffel Woofers 12-15" and the back part of the box make a full sponge based back like Aperiodic vent. I dont want to have a 70 litre sealed box so was thinkig if Aperioid can give me bass. I am happy even if it covers 50Hz well. Searched a lot but no where I could find a aperiodic small box subsolution.
I want a Subwoofer thats small footprint but still creates decent pressure in a medium size room. Say if I use SB Audience Open BAffel Woofers 12-15" and the back part of the box make a full sponge based back like Aperiodic vent. I dont want to have a 70 litre sealed box so was thinkig if Aperioid can give me bass. I am happy even if it covers 50Hz well. Searched a lot but no where I could find a aperiodic small box subsolution.
Greets!
Yes, if you use higher Qt drivers (~1.0 Qt) than SBA and/or a ~0.5 - 1.0 octave lower Fs than desired to offset the lower Qt, lack of a sealed cab, then tuned with sponge density or nowadays just use DSP to frequency shape it to 'taste'.
Yes, if you use higher Qt drivers (~1.0 Qt) than SBA and/or a ~0.5 - 1.0 octave lower Fs than desired to offset the lower Qt, lack of a sealed cab, then tuned with sponge density or nowadays just use DSP to frequency shape it to 'taste'.
The Ripole formula can be considered aperiodic since it is not tuned... Moreover, it is compact and delivers a floating but non-resonant, omnidirectional but unobtrusive infra-bass of its own. Mine below is 400x400x440mm, fitted with 2x12" Beyma 12BR70, and can reach 15Hz. The Sub module cuts at 40Hz / 12 or 24dB/Oct. , depending on the speaker's natural low cut-off that are paired with.
This subwoofer is notably remarkable when paired with Magneplanar speakers (tests made with MG 2.5 and SMGb).
T
This subwoofer is notably remarkable when paired with Magneplanar speakers (tests made with MG 2.5 and SMGb).
T
You can get that footprint even smaller than Tubelectron’s by routing holes in the side panels for the woofer magnets to protrude. Make sure you give it space…..at least 1m on all sides.
This won’t pressurize your room though. OB/Dipole/Ripole excel at midbass where they give you that tactile slam at 100-200hz so ideally used in a 3way speaker, not a subwoofer where all of that advantage is low passed away.
If we’re talking 80hz on down, and a small footprint?…..opposed 8” subs in a sealed box with DSP will produce far better results and an even smaller footprint.
This won’t pressurize your room though. OB/Dipole/Ripole excel at midbass where they give you that tactile slam at 100-200hz so ideally used in a 3way speaker, not a subwoofer where all of that advantage is low passed away.
If we’re talking 80hz on down, and a small footprint?…..opposed 8” subs in a sealed box with DSP will produce far better results and an even smaller footprint.
No @mayhem13 : the Ripole is intended to be used as fast and tight infra-bass, rather than the 100-200Hz (or over) range, where you tend to approach the resonances of the compression cavities which see their peaks in the 200-400Hz region.
You see below the matching dip and peak that I mention (doc. from Mr Ridthahler / Ripole inventor) located at circa 250 and 400Hz :
Consequently, don't expect too much using a Ripole over 80-100Hz, to avoid these response issues...
And yes, if you need the typical Home-Theater Boom-Boom, it's better to use a Bass-Reflex subwoofer than the Ripole : the pressurization - as you say - will be more efficient...
T
You're missing the point......all Dipole systems will require some shaping, whether it through acoustic mechanical or electrical. The ripole has been around a long time......Nelson Pass was the first to suggest it and then moved on......it's a niche device with serious compromises as is......the only USEFUL situation i could accept would be notching that resonant peak and using it to the end of it's passband.....otherwise, .....those two 10-12" woofers?..........much better in some boxes properly placed. The Ripole without any correction is like washing your car with bottled water so you don't have to use a towel.
Now if you wanna mess with/experiment with increasing the mass loaded slot air with vario vents to actually create a 'useful' cardioid response........have at it.
Now if you wanna mess with/experiment with increasing the mass loaded slot air with vario vents to actually create a 'useful' cardioid response........have at it.
What you are missing is dicovering, building and experimenting the Ripole principle, obviously ! 😆
Criticism is easy, but... No pictures ? Never existed ! 😉
Different Ripole size experimentations at home :
Ripole placement in my tiny Auditorium - placement in accordance with Mr. Ridtahler's indications :
The builds (below, unfinished at that time) of one of my friends, after listening to my 2x12" Omega Ripole : he went for two 2x18" Ripoles, instead of his pair of Velodyne subs...
Tests with another friend, a Magnepan fan and rebuilder, in his auditorium :
Axel Ridtahler, the German acoustic engineer, who patended the Ripole principle :
T
Get the right speaker and it will work.
A well stuffed small sealed enclosure will probably sound the same.
I couldn’t tell the difference when using some 3-12/“ jbl car speakers in small boxes, powered by a 50wpc amp.
Open back, aperiodic, stuffed-sealed, no discernible difference in a large room, as long as the back wave was blocked somehow.
You might look at passive radiators as well, can save space with that design while utilizing what is basically a ported alignment.
A well stuffed small sealed enclosure will probably sound the same.
I couldn’t tell the difference when using some 3-12/“ jbl car speakers in small boxes, powered by a 50wpc amp.
Open back, aperiodic, stuffed-sealed, no discernible difference in a large room, as long as the back wave was blocked somehow.
You might look at passive radiators as well, can save space with that design while utilizing what is basically a ported alignment.
I have visaton Petite orgue its a 10" ripole sweet bass but doesnt presserize my room. I have Beyma 12BR70 4 drives in my OB with TB1808 FullRange I can try the Beyma am sure it will be better than the 10" ripole of Visaton. Can you share the dimentions of your Beyma Ripole please. I see the magnet circle is not cut on the side of the box thats different than my Visaton ripole.The Ripole formula can be considered aperiodic since it is not tuned... Moreover, it is compact and delivers a floating but non-resonant, omnidirectional but unobtrusive infra-bass of its own. Mine below is 400x400x440mm, fitted with 2x12" Beyma 12BR70, and can reach 15Hz. The Sub module cuts at 40Hz / 12 or 24dB/Oct. , depending on the speaker's natural low cut-off that are paired with.
This subwoofer is notably remarkable when paired with Magneplanar speakers (tests made with MG 2.5 and SMGb).
T
Also in your studio Pic you have a 3 way speaker do you find the bass of the beyma 12br70 ripole better than the 3 way in pressurizing theroom.
I am not sure that these are the exact build dimensions, but OK : you have the picture...
In fact, my 3-ways 375L studio monitor don't really need the help of my Omega Ripole sub. I use it mainly with my Magnepan SMGb for infra-bass extension. This is the only type of sub that I tested with success to marry and blend with magneplanar speakers...
T
In fact, my 3-ways 375L studio monitor don't really need the help of my Omega Ripole sub. I use it mainly with my Magnepan SMGb for infra-bass extension. This is the only type of sub that I tested with success to marry and blend with magneplanar speakers...
T