Hello,
i want to present my recently completed Alpair-project here....and it has even lasted long enough :-D
Principle it is a 19 liters BR-enclosure with a broad baffle and 'Alpair 10.2eN' by planet_10 (at this point thanks again, Dave!)
'nuff said...here are the pictures:
The CAD-drafts....
...and the reality
Some pics of making them:
cheers, Alex
i want to present my recently completed Alpair-project here....and it has even lasted long enough :-D
Principle it is a 19 liters BR-enclosure with a broad baffle and 'Alpair 10.2eN' by planet_10 (at this point thanks again, Dave!)
'nuff said...here are the pictures:
The CAD-drafts....
...and the reality
Some pics of making them:
cheers, Alex
Impressive stuff Alex - congratulations on the successful build! How do they sound?
This is the first time I am seeing this sort of an implementation of the high aspect ratio ports...can you and Dave share the reasons behind the placement and design?
I might be wrong, but some wool felt type lining might be better than the convoluted foam that you have on the inside of the rear panel.
Recall Dave mentioning that at 19 litres and with this sort of cabinet height, it is likely that there will be some quarter wave action - would be good to hear from Dave that how does this come into play in the overall design and sound reproduction.
This is the first time I am seeing this sort of an implementation of the high aspect ratio ports...can you and Dave share the reasons behind the placement and design?
I might be wrong, but some wool felt type lining might be better than the convoluted foam that you have on the inside of the rear panel.
Recall Dave mentioning that at 19 litres and with this sort of cabinet height, it is likely that there will be some quarter wave action - would be good to hear from Dave that how does this come into play in the overall design and sound reproduction.
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Thanks!
With music that I know, they sound like they should ;-)
No, they go impressively 'deep' and enough punchy (for me)!
Metal-guitars from the nineties (eg. Metallica and Tool) sometimes sond's a bit harsh and slightly cheeky...but they have a wide and accurate soundstage.
This German article brought me to this construction: MarkO
The membrane is attached very directly to the air and the ports.
I have, however, omitted the middle holes and used a normal port-calculation.
The width of the baffle is based on a article in a German magazine (HobbyHifi)
I still experimenting with the stuffing. I do not want to *damp-to-dead* the enclosure ;-)
With music that I know, they sound like they should ;-)
No, they go impressively 'deep' and enough punchy (for me)!
Metal-guitars from the nineties (eg. Metallica and Tool) sometimes sond's a bit harsh and slightly cheeky...but they have a wide and accurate soundstage.
This German article brought me to this construction: MarkO
The membrane is attached very directly to the air and the ports.
I have, however, omitted the middle holes and used a normal port-calculation.
The width of the baffle is based on a article in a German magazine (HobbyHifi)
I still experimenting with the stuffing. I do not want to *damp-to-dead* the enclosure ;-)
Very Nice. That looks like my kind of speaker. What do you drive them with?
About the only suggestion I could possibly (possibly!) make would be for you to use some soft wool heavy cloth wrapped around the back of the driver with a rubber band to prevent back waves from coming out through the cone/surround. I would think that with the shallow depth this would be a good problem to try to remedy. Where are you?
congrats
About the only suggestion I could possibly (possibly!) make would be for you to use some soft wool heavy cloth wrapped around the back of the driver with a rubber band to prevent back waves from coming out through the cone/surround. I would think that with the shallow depth this would be a good problem to try to remedy. Where are you?
congrats
Thanks @all for the positive responses 
With the most music they sound great. Sometimes it seems to me they were born for VNV Nation and other Electronic!
They get driven by Denon PMA/DCD-700AE.
@mor2bz: Thanks for this suggestion. But what do you exactly mean with "soft wool heavy cloth"? Unfortunately, the driver due to the design space is limited.
With the most music they sound great. Sometimes it seems to me they were born for VNV Nation and other Electronic!
They get driven by Denon PMA/DCD-700AE.
@mor2bz: Thanks for this suggestion. But what do you exactly mean with "soft wool heavy cloth"? Unfortunately, the driver due to the design space is limited.
The stands were also a lot of work ... right!
For me, sometimes the journey is the destination! :-D
I'm a designer and programmer in a metal manufacturing company. The aluminum parts were mostly made from residues and / or scrap. The column, for example, is made of extruded aluminum and is hollow inside. The dimensions are 100 x 126mm Outside (4 "x 4.5").
Apropos: I fill the columns with sand. I have to dry the sand before in a bowl on the wood stove! Because ... I had bought mistakenly "play sand". And this is soaking wet!
For me, sometimes the journey is the destination! :-D
I'm a designer and programmer in a metal manufacturing company. The aluminum parts were mostly made from residues and / or scrap. The column, for example, is made of extruded aluminum and is hollow inside. The dimensions are 100 x 126mm Outside (4 "x 4.5").
Apropos: I fill the columns with sand. I have to dry the sand before in a bowl on the wood stove! Because ... I had bought mistakenly "play sand". And this is soaking wet!
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Fly to Frankfurt, then 35 miles northwards. And don't forget the beer!
These look fabulous! and beer and Easyjet-isk flight sounds like a nice weekend! I bet these sound fabulous.
I've been looking for some larger extrusions for a similar project... Did your smaller speakers get a build thread? I can't find one...
John
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