Hi,
First post. 😛
Have done a few DIY builds before (not my own designs) of speakers and amps and are fairly good with a set of power tools. I have access to a carpentry workshop and even a CNC if needed.
Am presently using a pair of AudioVector M3 Signature. Which I love by the way...
Have been checking out various DIY loudspeaker projects, and are looking for something out-of-the-ordinary. Enter Jamo R909! That is one nice looking speaker! 😀 Never had the opportunity to listen to it.
I know practically next-to-nothing about the dipole technology, but figured that with some help and guidelines perhaps such a project could be carried through?
I don't have a test lab and unlimited time and resources, so unless you think there's a chance I could actually get a well sounding speaker out of it, I think I'd better forget all about it. But I would very much like to give it a shot though...
Let me know what you think. Thanks.
/G
First post. 😛
Have done a few DIY builds before (not my own designs) of speakers and amps and are fairly good with a set of power tools. I have access to a carpentry workshop and even a CNC if needed.
Am presently using a pair of AudioVector M3 Signature. Which I love by the way...
Have been checking out various DIY loudspeaker projects, and are looking for something out-of-the-ordinary. Enter Jamo R909! That is one nice looking speaker! 😀 Never had the opportunity to listen to it.
I know practically next-to-nothing about the dipole technology, but figured that with some help and guidelines perhaps such a project could be carried through?
I don't have a test lab and unlimited time and resources, so unless you think there's a chance I could actually get a well sounding speaker out of it, I think I'd better forget all about it. But I would very much like to give it a shot though...
Let me know what you think. Thanks.
/G
Thanks for the suggestions.
Regarding the Visaton NoBox how much would I "destroy" sound/performance-wise by making a curved front instead making it look much more like the R909? I would ensure to maintain the dimensions as suggested in the design (1215mm x 520mm).
Regarding the Visaton NoBox how much would I "destroy" sound/performance-wise by making a curved front instead making it look much more like the R909? I would ensure to maintain the dimensions as suggested in the design (1215mm x 520mm).
It doesn't matter if You make it curved or not, there are so many other more
important factors that decide if you like the sound or not...
I think you should take another closer look at the "Nao" site. Particular the Nao Note. The woofer section can either be dipole or cardioid.
I think you will find that the R909 is not likely in the same class as the Nao speakers or Linkwitzh Orion, for that matter.
best regards,
mkc
look here: Dipolplus
Gumleguf, there's a small hifi shop in Copenhagen, nearby Sortedam Dossering, where you can listen to the wonderful Jamo R907 and R909. I dont remember the name of the shop...
That would probably be http://www.topsoundhifi.dk. 🙂
I also found this "beginner-friendly project": My 'Volks-OB' Mission Accomplished. Only the designer seems to point out that NO CHANGES can be made to the baffle...
I also found this "beginner-friendly project": My 'Volks-OB' Mission Accomplished. Only the designer seems to point out that NO CHANGES can be made to the baffle...
Topsoundhifi even have a demo set of the R909 on sale: HIFI4ALL.DK | Tilbudsavisen | JAMO R-909
Only DKK 30.000 or EURO 4.000 or $ 5.5000 each. :|
Only DKK 30.000 or EURO 4.000 or $ 5.5000 each. :|
You will need a subwoofer for this one,
recommended crossover frequency is 80Hz,
6db/octave rolloff for the dipol 08 satelites and
an effective acoustical 18db/octave rolloff
for the subwoofer(s) at minimum.
Dipole subwoofers are recommended, a monophonic
(but dipole) subwoofer is also possible, covering the
range from about 35 to 80 Hz.
The subwoofer should be free from resonances/irregularities
up to 300Hz.
http://www.diyaudio.com/forums/full-range/176556-dipol-08-baffle-dimension-list-crossover-parts.html
recommended crossover frequency is 80Hz,
6db/octave rolloff for the dipol 08 satelites and
an effective acoustical 18db/octave rolloff
for the subwoofer(s) at minimum.
Dipole subwoofers are recommended, a monophonic
(but dipole) subwoofer is also possible, covering the
range from about 35 to 80 Hz.
The subwoofer should be free from resonances/irregularities
up to 300Hz.
http://www.diyaudio.com/forums/full-range/176556-dipol-08-baffle-dimension-list-crossover-parts.html
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Depends on whether you like the sound of the bass drum. If it is dispensable, you have lots of choices. If it is not, you can't easily* go OB.
Quite a stretch (in a literal sense) to get low notes from an OB even driving it nuts with Linkwitz-sized, Doppler-distortion engendering EQ.
*Does "easily" sound like a 3 x 5 foot sheet of MDF in your music room? In the odd event that it does, you can make a giant OB, like I did. Far better below 40 Hz than my Klipshorn and pretty good above too, in a small room.
Quite a stretch (in a literal sense) to get low notes from an OB even driving it nuts with Linkwitz-sized, Doppler-distortion engendering EQ.
*Does "easily" sound like a 3 x 5 foot sheet of MDF in your music room? In the odd event that it does, you can make a giant OB, like I did. Far better below 40 Hz than my Klipshorn and pretty good above too, in a small room.
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Hi all,
Thanks a lot for your inputs. Diving in to the world of OB does sound a bit more complicated than I originally thought. 😕
A kind soul has offered me to listen to his Emerald Physics CS2 and I think I'll try to do that sometime soon to get a better sense of what to expect from en OB speaker. Especially concerning bass response.
I did do a quick mockup/adaptation of the NoBox BB (perhaps using an Eminence Aplha 15A instead) parts for a R909 baffle. Notice the "bass tube" - I was thinking of making this "adjustable" as to better be able to tune the bass response to the room. The baffle is tilted back by 5 degress. The baffle dimensions are exactly those of the NoBox BB. I also think the speaker would need a tweeter as I like sparkling highs.
Thanks a lot for your inputs. Diving in to the world of OB does sound a bit more complicated than I originally thought. 😕
A kind soul has offered me to listen to his Emerald Physics CS2 and I think I'll try to do that sometime soon to get a better sense of what to expect from en OB speaker. Especially concerning bass response.
I did do a quick mockup/adaptation of the NoBox BB (perhaps using an Eminence Aplha 15A instead) parts for a R909 baffle. Notice the "bass tube" - I was thinking of making this "adjustable" as to better be able to tune the bass response to the room. The baffle is tilted back by 5 degress. The baffle dimensions are exactly those of the NoBox BB. I also think the speaker would need a tweeter as I like sparkling highs.
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An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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looks ok, but if you besides the sparkling heights (tweeter) like deep solid bass, you might need subwoofer
did you look at Dick Olshers basszilla?
Black Dahlia Acoustics - Loudspeaker Kit Plans
ed
did you look at Dick Olshers basszilla?
Black Dahlia Acoustics - Loudspeaker Kit Plans
ed
I know we don't all share the same taste (which is good!), but I really don't find this look very sexy for a speaker:
Most OB's I have seen are very "experimental" to look at (I do appreciate that many are "under development"...).
My primary focus is of course sound quality but I have to take the WAF into consideration as well... 😉
Most OB's I have seen are very "experimental" to look at (I do appreciate that many are "under development"...).
My primary focus is of course sound quality but I have to take the WAF into consideration as well... 😉
neither do I, but its completely up to the speaker builder how he does it
here is more of basszilla types, some better than others
Tip_45
just personal note, I would rather have ugly good sounding speakers than nice looking bad sounding ones
True, but if the result was an ugly good sounding speaker it wouldn't survive 2 hours in my house, and then what would be the point in building...? 😉
PS. THIS I almost like:
PS. THIS I almost like:
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Have a look at the Avro dipole speaker project in my signature line. It was developed by the guys over at Home Theater Guide. The project is fully developed and the resulting speakers sound just amazing!
Eric
Eric
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