Suitable drivers for RIPOLE sub

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audfrknaveen

Member
Joined 2018
#1
Hi Guys ... I am building a Push Push RIPOLE sub with two 15" drivers.

The driver should have the below characteristics for RIPOLE.

Low Fs
Low Cms (around 0.2mm/N)
Qts around 0.5
High Xmax

Is this understanding correct? Did I miss anything or wrong about anything?
Please suggest guys....Thanks a lot in advance.

The below are only for reference
Jazzman's DIY Electrostatic Loudspeaker Page: Ripole Subwoofers:

RiPole Subwoofer
 
#2
audfrknaveen said:
Hi Guys ... I am building a Push Push RIPOLE sub with two 15" drivers.

The driver should have the below characteristics for RIPOLE.

Low Fs
Low Cms (around 0.2mm/N)
Qts around 0.5
High Xmax

Is this understanding correct? Did I miss anything or wrong about anything?
Please suggest guys....Thanks a lot in advance.

The below are only for reference
Jazzman's DIY Electrostatic Loudspeaker Page: Ripole Subwoofers:

RiPole Subwoofer
Click to expand...

Keep in mind that those parameters are mostly important if you want to build a passive ripole.

If you are going active with say DSP then most parameters aren't that important anymore. The only thing that really matters is how much xmax the driver has and how much distortion does it have when working within xmax. A somewhat low fs is nice too such that efficiency is decent but ripoles need less watts than sealed subs to reach xmax.
 
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#6
I have recently had a friend who has a history of building Speakers produce dimensions for my Two Driver Ripole Cabinets.
I have other Dimensions for 15" Ripole Cabinets as well and the other thread on Riploles at present has a formula for Cabinet Dimensions in a post as well.

A timely post I would say 👍
 
#7
Hi,

in the thread JohnnoG mentioned I described the parameter set I´d use for a compact folded dipole.
The parameters audfrknaveen mentions are rather for open baffle dipoles.
The latter hardly affect the openair parameters of the driver, while compact folded dipoles affect the parameters considerably.
Depending on the driver´s and cabinet parameters the freeair resonance may drop by up to 15Hz!

jauu
Calvin
 
#8
That i was also thinking, the ripole sub cabinet raises the qts and lowers the FS due to the alignment, so a qts arround 0.4-0.45 and an FS arround 30-35Hz should be more than enough. More focus on strong BL and big xmax for this as it will need it.

The 16 ohm Faital 15FH500 driver could be a good candidate for that i think, put 2 in series in the ripole and you got an 8ohm woofer.
 
#9
waxx said:
That i was also thinking, the ripole sub cabinet raises the qts and lowers the FS due to the alignment, so a qts arround 0.4-0.45 and an FS arround 30-35Hz should be more than enough. More focus on strong BL and big xmax for this as it will need it.

The 16 ohm Faital 15FH500 driver could be a good candidate for that i think, put 2 in series in the ripole and you got an 8ohm woofer.
Click to expand...
16 Ohm + 16 Ohm in series = 32 Ohm
16 Ohm + 16 Ohm parallel = 8 Ohm
 
#10
waxx said:
That i was also thinking, the ripole sub cabinet raises the qts and lowers the FS due to the alignment, so a qts arround 0.4-0.45 and an FS arround 30-35Hz should be more than enough. More focus on strong BL and big xmax for this as it will need it.

The 16 ohm Faital 15FH500 driver could be a good candidate for that i think, put 2 in series in the ripole and you got an 8ohm woofer.
Click to expand...
Sorry, it was already late down here when i posted that, but it's true, it's in parallel that you have to use them. Thanks for the correction.
 
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