hello guys
well after a long time (too many business travels), i think there should be time to move on with this project.
What i'm about to do now, is make a negative mold (fill the fiber glass mold with some resin).
I'm looking for some material that is easy to pour (like liquid plaster) but is hard enough to be turned on lathe. but again it has to be soft enough to sand.
Well ,might be a hard one
Any suggestions?
well after a long time (too many business travels), i think there should be time to move on with this project.
What i'm about to do now, is make a negative mold (fill the fiber glass mold with some resin).
I'm looking for some material that is easy to pour (like liquid plaster) but is hard enough to be turned on lathe. but again it has to be soft enough to sand.
Well ,might be a hard one
Any suggestions?
Hello all....
Small update....
Nothing new
I am stuck in one location for very long time now, only in hotel...no chance to work on the enclosures
Its starting to p..s me off.
As a small redundancy to my self, I am playing with the overall shape in the sketchup.
Have a look...still did not decided on the LF speaker... (Eminence Alpha15A, Beta bla bla bla, 18" or 15", what make etc...) there will be enough time for that..
I still didn't found anybody in Amsterdam with a big manual lathe...anyone????
Feel free to comment on the design....
Uploaded with ImageShack.us
As I see it, I might loose some LF extension due to the raised position of the woofer....
Small update....
Nothing new
I am stuck in one location for very long time now, only in hotel...no chance to work on the enclosures
Its starting to p..s me off.
As a small redundancy to my self, I am playing with the overall shape in the sketchup.
Have a look...still did not decided on the LF speaker... (Eminence Alpha15A, Beta bla bla bla, 18" or 15", what make etc...) there will be enough time for that..
I still didn't found anybody in Amsterdam with a big manual lathe
...anyone????Feel free to comment on the design....
An externally hosted image should be here but it was not working when we last tested it.
Uploaded with ImageShack.us
As I see it, I might loose some LF extension due to the raised position of the woofer....
Hello Joe,
well I personaly would like to go with huge cabinets, many ways, active etc etc.
But.....there is a big WAF to consider as I am married.
I have to please the eye with my design, and this one could get the green light.
I think I can compensate the roll off with some EQ and 18" cone area.... (personally even 15" is enough)
Also I'd like to take it to some ventures to show this design (if it work that is )
and would like to have a lot of headroom for more dB.
Just got me thinking about the x-over. You all think the DCX2496 is sufficient? Or ny other reasonably priced active xover? (song of future )
well I personaly would like to go with huge cabinets, many ways, active etc etc.
But.....there is a big WAF to consider
as I am married.I have to please the eye with my design, and this one could get the green light.
I think I can compensate the roll off with some EQ and 18" cone area.... (personally even 15" is enough)
Also I'd like to take it to some ventures to show this design (if it work that is
)and would like to have a lot of headroom for more dB.
Just got me thinking about the x-over. You all think the DCX2496 is sufficient? Or ny other reasonably priced active xover? (song of future
)
Hi Barackuda,
I am not sure if such a hybrid is a good idea, although it's worth trying.
I am worried about the matching problem between the monopole full range driver and the dipole woofer as you might experience a shift in polarity and room interaction.
I would suggest using a more conventional approach with sealed/bass reflex woofer.
I am not sure if such a hybrid is a good idea, although it's worth trying.
I am worried about the matching problem between the monopole full range driver and the dipole woofer as you might experience a shift in polarity and room interaction.
I would suggest using a more conventional approach with sealed/bass reflex woofer.
boris thanks to chime in....
yes there might (will ) be many problems
My approach will be to 90% fully active, so the control might be better...we will see.
Perhaps it will be just luck (a lot of it) and it might sound acceptable... If not, at least it will be a great experience. And then will come more head scratching on new speaker
Thats the way in DIY...you're never satisfied.....
jeeeezus....its been over a year now why do we have to work?
yes there might (will ) be many problems
My approach will be to 90% fully active, so the control might be better...we will see.
Perhaps it will be just luck (a lot of it) and it might sound acceptable... If not, at least it will be a great experience. And then will come more head scratching on new speaker
Thats the way in DIY...you're never satisfied.....
jeeeezus....its been over a year now
why do we have to work?
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Hi Barackuda,
I will start to work on my open baffle project in Christmas (yeah, school holidays!) and your experience will provide me quite a bit of knowledge on how to improve my design. =]
The interesting part of your design is the side firing nature of the dipole woofers. I suspect that will give you some weird out-of-phase bass in certain position and when you shift your position very slightly, it will become in-phase again... From conventional wisdom, that will occur. That's why some guys are suggesting the use of "ripol", which will probably to a better job, although slightly larger and less aesthetically pleasing.
I will start to work on my open baffle project in Christmas (yeah, school holidays!) and your experience will provide me quite a bit of knowledge on how to improve my design. =]
The interesting part of your design is the side firing nature of the dipole woofers. I suspect that will give you some weird out-of-phase bass in certain position and when you shift your position very slightly, it will become in-phase again... From conventional wisdom, that will occur. That's why some guys are suggesting the use of "ripol", which will probably to a better job, although slightly larger and less aesthetically pleasing.
If bass is non directional below around 150hz why won't this design work?
And how about considering an AR9 style double side firing woofers?
http://www.agoraquest.com/editor/upload/2kf4e5492667.jpg
And how about considering an AR9 style double side firing woofers?
http://www.agoraquest.com/editor/upload/2kf4e5492667.jpg
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I am afraid I have to disagree on this. Dipole bass is directional. There's nulling when you're right between the two poles. They don't call it figure of eight for nothing.
Joe:
thanks for the link, I have checked Ripole subs...
Thats doubling up on drivers, so the cost. I have no experience with ripole subs, but I had dipole LF channel for a long time while in UK. I had only 2 Alpha15's per side, then changed to Beymas 18" per side, and I did liked what I heard.
I am more concerned right now with the teardrop enclosure than the LF channel.
I do have one favor to ask from guys who have H frame subs...
Can you place them with the drivers facing to sides and listen to some music?
I would like to know what are the changes in this configuration.
Thanks...
BTW: the name is Danny
thanks for the link, I have checked Ripole subs...
Thats doubling up on drivers, so the cost. I have no experience with ripole subs, but I had dipole LF channel for a long time while in UK. I had only 2 Alpha15's per side, then changed to Beymas 18" per side, and I did liked what I heard.
I am more concerned right now with the teardrop enclosure than the LF channel.
I do have one favor to ask from guys who have H frame subs...
Can you place them with the drivers facing to sides and listen to some music?
I would like to know what are the changes in this configuration.
Thanks...
BTW: the name is Danny
Danny: That's ok, I just had to check as 'd' and 'r' are very close together etc etc. I don't know if you have two together like in the last link. You may be able to have single ones on either speaker unit. Like in this link. Need someone with more knowledge on the subject. Look at this one and it only uses a single sub.
Take a look at this link I found, maybe of interest and help.
An externally hosted image should be here but it was not working when we last tested it.
Take a look at this link I found, maybe of interest and help.
An externally hosted image should be here but it was not working when we last tested it.
Wow, you are very good with Sketchup... What you've designed there looks very interesting indeed... both of your designs do. If i had not packed up my H-frames i'd have already tested them for you in the positions you require but they are safe and sound in a closet probably for at least a year.
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