@Monteverdi ,
I have the non opposing ripole. I have no clue at which frequency it would resonate. I don't go higher than 60hz. I do have a peak at 37hz, but suppose that's room mode related.
Looking at the difference between the designs I would think the two driver ripole will have less resonance. Both drivers push against eachother. Whilst in the single one the driver pushes against the enclosure. And at that point it is a rather large surface.
A ripole from 30 to 150hz seems rather a stretch to me.
Regards, Hajo
I have the non opposing ripole. I have no clue at which frequency it would resonate. I don't go higher than 60hz. I do have a peak at 37hz, but suppose that's room mode related.
Looking at the difference between the designs I would think the two driver ripole will have less resonance. Both drivers push against eachother. Whilst in the single one the driver pushes against the enclosure. And at that point it is a rather large surface.
A ripole from 30 to 150hz seems rather a stretch to me.
Regards, Hajo
^^ I don't think the change would be noticeably if at all any unless its a drastic change. May be you can compare with combined output for both cases in Hornresp.
I am not so excited with the sims for W5 so I will defer this project for a while.
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@bogdanrosca
I wonder if that would work. The back will be very close to the back wall/logs.
In general you would like to have more distance from the back wall with open baffle.
Regards, Hajo
I wonder if that would work. The back will be very close to the back wall/logs.
In general you would like to have more distance from the back wall with open baffle.
Regards, Hajo
With this position, I intend to overlapp over 150 Hz with the low bass of the ob and to compensate with the right phase and delay on the dsp the loss of the back side of the ob
Since it is a small cavity with SLS Peerless 10”, I hope that the resonance will be over 150Hz
It is a long shot, but it worth to try
Since it is a small cavity with SLS Peerless 10”, I hope that the resonance will be over 150Hz
It is a long shot, but it worth to try
@bogdanrosca
I did have a ripole with 2 10" peerless. I did make a second to get decent output around 20hz. But you made a test setup. Does it deliver enough output for you around the 30hz?
I did have a ripole with 2 10" peerless. I did make a second to get decent output around 20hz. But you made a test setup. Does it deliver enough output for you around the 30hz?
@bogdanrosca
That looks good I think. How is it at the listening position? I wanted to go lower than 30hz. Down to 10hz. That would have been my problem. Couldn't get to 20hz with the 2 either, so I made another subwoofer with more power.
That looks good I think. How is it at the listening position? I wanted to go lower than 30hz. Down to 10hz. That would have been my problem. Couldn't get to 20hz with the 2 either, so I made another subwoofer with more power.
Just browsing for a possible driver I found that 10”woofer specifically designed for open baffle https://audioxpress.com/article/test-bench-the-uf295fas-thin-profile-dipole-10-woofer-from-neotera
Not very sensitive and also no idea if it is even available. Likely also very expensive but interesting design without standard spider and voice coil on the outer edge. I wonder if its parameter would be useful also for ripol
Not very sensitive and also no idea if it is even available. Likely also very expensive but interesting design without standard spider and voice coil on the outer edge. I wonder if its parameter would be useful also for ripol
Looks good, expensive though . 990 dollar at Mafisound. At least for me that is expensive.
I use 4 shallow car subwoofer drivers.
I use 4 shallow car subwoofer drivers.
So I finally put together the Ripole enclosures.... With two Beyma 12BR70's per enclosure.
Surprisingly good results. I had the Beymas in an open-back configuration before, they were OK really, but I was intrigued by the Ripole so made a pair.
The Ripoles are subjectively playing much deeper, with more authority (if that's the correct description).
The measurements are also self-telling - attached below. The peak is at 330 Hz, exactly the same in both and slightly higher than I expected, based on what I read here from other users. Which is good in fact, allows more useable FR.
And the boxes are 1/2 the size (of the old ones they were in).
Now repurposing the old boxes for a different project....
Measurements: Green is the Ripole, and Red is the original OB system, BOTH measured near-field (at different times, so not 100% sure about the relative SPL, but subjectively the levels are very similar).
Surprisingly good results. I had the Beymas in an open-back configuration before, they were OK really, but I was intrigued by the Ripole so made a pair.
The Ripoles are subjectively playing much deeper, with more authority (if that's the correct description).
The measurements are also self-telling - attached below. The peak is at 330 Hz, exactly the same in both and slightly higher than I expected, based on what I read here from other users. Which is good in fact, allows more useable FR.
And the boxes are 1/2 the size (of the old ones they were in).
Now repurposing the old boxes for a different project....
Measurements: Green is the Ripole, and Red is the original OB system, BOTH measured near-field (at different times, so not 100% sure about the relative SPL, but subjectively the levels are very similar).
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Well done.🙂
How do you tame the resonance, please?
24 dB filter or a parrallel notch in serie ?Which cut off crossover point with the mid did you choose?
How do you tame the resonance, please?
24 dB filter or a parrallel notch in serie ?Which cut off crossover point with the mid did you choose?
Thanks @diyiggy .
Right now with a DSP notch @ 330 Hz, Q 2.5, G - 10 dB, on top of 120 Hz LP LR24: pretty easy and clean - ...but this is only the first hours, just for testing.
After reassembling, finishing etc, which will take some time, I might try a passive notch. Will see what the parts bin will say 🙂
Right now with a DSP notch @ 330 Hz, Q 2.5, G - 10 dB, on top of 120 Hz LP LR24: pretty easy and clean - ...but this is only the first hours, just for testing.
After reassembling, finishing etc, which will take some time, I might try a passive notch. Will see what the parts bin will say 🙂
