Years ago I built a pair of OBs that used Selenium 15" woofers with a Qts of 0.7 I found them ideal to work with and very much enjoyed the sound. My neighbors also enjoyed the sounds. 🙂 Alas one woofer was crushed when we moved house, and they don't make them any more. PRV does have a similar woofer for sale, tho.
I hear those PRVs are well received. Do you have any direct experience with those in your setup?
I prefer a higher Qts driver. My current favorite, which I encourage you to check out, is the Fi Car Audio IB318v2:
IB3 Series - IB318 v2 | Fi Car Audio
It's very reasonably priced, too. Made in Nevada, USA. I use it in an H-frame , but it would work in a planar OB as well.
IB3 Series - IB318 v2 | Fi Car Audio
It's very reasonably priced, too. Made in Nevada, USA. I use it in an H-frame , but it would work in a planar OB as well.
https://www.newark.com/mcm-audio-select/55-2974/15-woofer-with-poly-conerubber/dp/80R7013
Note the review (right side of page scroll down on review section) by "montekay".
I've got just a pair of these parallel connected for the low-freq. effects channel in my floor-loaded dipole sub platform for my HT. I should have gotten at least 4.. but they still do well for that task with just 2 even though I'm over-driving them. The only problem I did have with them is that the VC leads were bowed-out/down to the cone so much that when driven to over-excursion that the diaphragm slapped against the VC leads. I got rid of this problem by gluing the excess leads to some felt that I glued to the frame (right near those leads); sort of a "lift and separate" of those leads.
It's NOT a driver I'd want to use much above 90 Hz because the motor is so weak that it lacks clarity/articulation. (..a .6 Qts driver with most of that lower number derived from a low Qe, usually provides better clarity - but it looses-out on bass extension near the average.)
Note the review (right side of page scroll down on review section) by "montekay".
I've got just a pair of these parallel connected for the low-freq. effects channel in my floor-loaded dipole sub platform for my HT. I should have gotten at least 4.. but they still do well for that task with just 2 even though I'm over-driving them. The only problem I did have with them is that the VC leads were bowed-out/down to the cone so much that when driven to over-excursion that the diaphragm slapped against the VC leads. I got rid of this problem by gluing the excess leads to some felt that I glued to the frame (right near those leads); sort of a "lift and separate" of those leads.
It's NOT a driver I'd want to use much above 90 Hz because the motor is so weak that it lacks clarity/articulation. (..a .6 Qts driver with most of that lower number derived from a low Qe, usually provides better clarity - but it looses-out on bass extension near the average.)
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I should also note that they don't provide much tactile sensation (except for how it shakes the frame/platform it's connected to).. but I've also got 2 bass-shakers per HT chair.
TRUTH:
Maybe the best option if OB is you thing is to double up the number of drivers you think you need right away. The distributed load difference between 2 x 15s and 4 x 15s a side is significant. I use 6 x 15s a side with FS of the drivers at 42hz and I do get a slight roll off below 40hz after EQ but usable down to 25hz and I don't hear the stress that I heard with 2 x 15 a side.
For OB I like the presentation of less physical impact. It does not pressurize the room like sealed or ported.
Hello, I am running now Viston BGS40 in H Frame, I would like to try another speaker with more bass. For example :
FSL-1520R02-08 - Tymphany
Cheap enough, may be 2 in parallel ...
Or LaVoce:
http://www.lavocespeakers.com/lavoce/assets/datasheets/LAVOCE_LBASS15-15_15in_WOOFER_A.a.pdf
FSL-1520R02-08 - Tymphany
Cheap enough, may be 2 in parallel ...
Or LaVoce:
http://www.lavocespeakers.com/lavoce/assets/datasheets/LAVOCE_LBASS15-15_15in_WOOFER_A.a.pdf
These look like very good value for money, and have the right attributes, apart from the lowish Qts.
https://cpc.farnell.com/peerless-by...o-18-woofer-3-vc-8-ohm/dp/LS05141?st=Peerless
https://cpc.farnell.com/peerless-by...o-18-woofer-3-vc-8-ohm/dp/LS05141?st=Peerless
address change:
https://www.newark.com/mcm-audio-select/55-3234/200w-rms-4-ohm-rubber-surround/dp/43W7875
..and because they will likely change it again, it's the MCM Audio 55-3234 Woofer with Polypropelyne Cone and Rubber Surround (..if you need to search for it).
That speaker looks great! Very nice job. I would be interested in building something like this. Do you have a build thread somewhere? or at least some more information like a design or measurements?
No, I am afraid not. But it is as simple as it gets. A sturdy baffle and some drivers, and that's it
I might be able to find some measurements, but be warned that in room measurements at low frequencies can be deceiving, due to room modes
Mikkel
I might be able to find some measurements, but be warned that in room measurements at low frequencies can be deceiving, due to room modes
Mikkel
Now that I'm here.
Has anyone tried the GRS woofers? They look to offer great value for the money.
I have succesfully used the GRS 10PF-8 in a couple of designs, but the bigger 12PF-8 og 12SW-4 look interesting for OB bas.
Can anyone advise on what to go for:4x 12PF-8 (cone area) or 2x 12SW-4 (x-max).
Here is some info:
Model Qts Fs Xmax Sen Pris Eur
12PR-8 1,26 32 3,5 84 30
12PF-8 1,54 35 3,5 87 23
12SW-4 0,98 29 8,5 88 37
10PF-8 1,27 43 3 87 18,5
15PF-8 1,39 29 4 87 40
Has anyone tried the GRS woofers? They look to offer great value for the money.
I have succesfully used the GRS 10PF-8 in a couple of designs, but the bigger 12PF-8 og 12SW-4 look interesting for OB bas.
Can anyone advise on what to go for:4x 12PF-8 (cone area) or 2x 12SW-4 (x-max).
Here is some info:
Model Qts Fs Xmax Sen Pris Eur
12PR-8 1,26 32 3,5 84 30
12PF-8 1,54 35 3,5 87 23
12SW-4 0,98 29 8,5 88 37
10PF-8 1,27 43 3 87 18,5
15PF-8 1,39 29 4 87 40
Thank you for your swift Reply Mikkel! I was thinking using an inexpensive woofer like:
vervangingsspeaker 15 inch kopen? - Elektronicatekoop.nl
or a GRS like this one:
GRS 15PF-8 15" Paper Cone Woofer
GRS 15PF-8 woofer kopen - SoundImports
Not the best for open baffle im sure but close enough and the combined cone area should compensate for low bass response quite a bit.
Made a quick sketch:
Gr, Mike
vervangingsspeaker 15 inch kopen? - Elektronicatekoop.nl
or a GRS like this one:
GRS 15PF-8 15" Paper Cone Woofer
GRS 15PF-8 woofer kopen - SoundImports
Not the best for open baffle im sure but close enough and the combined cone area should compensate for low bass response quite a bit.
Made a quick sketch:
Gr, Mike
Two very smart guys with more experience than most (and serious $$ resources!) in subwoofer design and open baffle bass systems are:
http://www.humblehomemadehifi.com/download/Humble Homemade Hifi_Serious Sub.pdf
and "Stig Eric" on this DIY forum, search up his "https://www.diyaudio.com/forums/multi-way/142015-baffle-dipole-beyma-tpl-150-a.html thread which ends up with THE best ever open baffle bass... One of the best threads ever on this forum... The guy is a legend!
Cheers
A.
http://www.humblehomemadehifi.com/download/Humble Homemade Hifi_Serious Sub.pdf
and "Stig Eric" on this DIY forum, search up his "https://www.diyaudio.com/forums/multi-way/142015-baffle-dipole-beyma-tpl-150-a.html thread which ends up with THE best ever open baffle bass... One of the best threads ever on this forum... The guy is a legend!
Cheers
A.
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The GRS 15PF-8 is also good and cheap. It won't cost much to import it from the EU also i think: Looking for a GRS 15PF-8 woofer? - SoundImports
It's used quiet a lot here in the EU for OB bass. Basicly look for a woofer with a higher qts (above 0.5 certainly, preferable above 0.7) and relative high sensivity (as you loose a part of that) and low enough Fs.
It's used quiet a lot here in the EU for OB bass. Basicly look for a woofer with a higher qts (above 0.5 certainly, preferable above 0.7) and relative high sensivity (as you loose a part of that) and low enough Fs.
Wow that is cheap!
Several years ago i tested OB with Alpha 15a driver to get a feeling of it. I think the GRS on paper look the same.
The high Qts omits the need for high EQ in the low end, but price to pay for that is weak magnet.
I sold my Alpha 15a soon after I found the bass to be one-note!
Several years ago i tested OB with Alpha 15a driver to get a feeling of it. I think the GRS on paper look the same.
The high Qts omits the need for high EQ in the low end, but price to pay for that is weak magnet.
I sold my Alpha 15a soon after I found the bass to be one-note!