Page 4 of 9
Re: Bass Cabinet Stuffing
Posted: November 18th, 2017, 10:30 am
by brombo
If you want to make some Carver open baffle line array woofers you can still get the woofers and they are not too costly.
http://www.dynavox.com/12inch-Carver-Am ... fer-DriverThe user manual for the Carver Amazing Loudspeakers has the woofer theory in it and I gave my copy to one of our members along with my Carvers. Note the theory requires a small magnet woofer (one reason why the woofers don't cost too much). Attached is the service manual for the Carver Amazing speakers.
Re: Bass Cabinet Stuffing
Posted: November 18th, 2017, 11:05 am
by Pelliott321
I have eight of them going on ebay soon
Re: Bass Cabinet Stuffing
Posted: November 18th, 2017, 12:50 pm
by Cogito
Pelliott321 wrote:a good woodworker can carefully cut the back out, add cleats and gaskets then fit a new back. Easy weekend project
I spent couple of days trying to remove the back panel in vein. Even after moving all 33 screws, I could not knock out the panel. It is glued in.
Instead of spending time destroying the back panel, cleaning surfaces and rebuilding a new panel, I prefer to building a new larger box. But first, I need to need to understand this box and how far I can take it with damping, controlling resonances and increasing the mass. I am not trying to solve any problem, just trying to improve, and this exercise involves lot of learning of the science of speaker design and my system. Walt showed me what is possible with Altecs and gave me invaluable information. If my speakers are the same model as Walt's I would duplicate his implementation and be done with it. His is a ported box with different woofer which he converted into sorta TL. Mine is a sealed box with different drivers. So I need to start from scratch.
Re: Bass Cabinet Stuffing
Posted: November 18th, 2017, 1:06 pm
by Cogito
Altec makes the claim about 16lb dynamic force over and over again regarding my woofers, Altec 411-8A. I could not find any reference how it compares with other woofers or how to relates to T/s specs.
Anyone?
Operating in a properly designed and sealed infinite baffle enclosure, this unique designed speaker unit is capable of producing a Dynamic Force of up to 16 lbs.
...
An 18 lb magnetic structure allows this speaker to develop a dynamic force of 16 lbs for extremely good transient response.
- b.png (238.23 KiB) Viewed 20454 times
Re: Bass Cabinet Stuffing
Posted: November 18th, 2017, 2:05 pm
by brombo
This link might be useful in finding some enclosure design software -
http://www.diyaudio.com/forums/software ... tware.htmlI'm sure other members have favorite software they could recommend.
Re: Bass Cabinet Stuffing
Posted: November 18th, 2017, 2:32 pm
by Jim G
For ideas/advise about your particular drivers and box implementation, consider posting at the Altec/Lansing forum.
http://www.audioheritage.org/vbulletin/
Re: Bass Cabinet Stuffing
Posted: November 18th, 2017, 9:26 pm
by chris1973
hey Sashi,
Yeah, I'm still here
Bassbox is good. You have to pay for it, but it's much easier to learn how to use than any of the stuff I have downloaded free on the internet. It does a lot of user friendly stuff that helps if you don't exactly have an engineering background.
It comes in a bundle with crossover pro. If you want to buy them both it's a little cheaper to do them together I think.
I bought both, even though I didn't touch crossover pro for many years, but now I'm on both all the time!
Instead of being stuck on the forums, or having to pay somebody to design something for me every time I have a wild idea or see a new driver or combination of drivers I want to speculate about, I can figure a lot of that stuff out myself with those two programs!
Chris
Re: Bass Cabinet Stuffing
Posted: November 19th, 2017, 8:31 am
by Pelliott321
Shashi
You can add bracing with out opening the box
You can rip 2X4 to get 1 3/4 X 3/4 stock and carefully cut. To length just slightly larger than inside demension (1/32) of your box. This is a bit tedious but it can be done with a miter box and cutting small amounts (the salami principal) until you get a very tight fit. You do not even have to glue them in to hear how it sounds.
Two or three accross and a couple front to back
The other choice is to glue ceramic tile to the inside walls. This would stiffen the walls also
Building a new box is the ultimate but not that easy to end up with something that looks good. You also lose the vintage look. All depends what is the goal. Personally I like the vintage look.
With The amount of time Walt put into his Valencia's he could have built a perfect box(if that exits)
Re: Bass Cabinet Stuffing
Posted: November 19th, 2017, 11:27 am
by SoundMods
Pelliott321 wrote:Shashi
You can add bracing with out opening the box
You can rip 2X4 to get 1 3/4 X 3/4 stock and carefully cut. To length just slightly larger than inside demension (1/32) of your box. This is a bit tedious but it can be done with a miter box and cutting small amounts (the salami principal) until you get a very tight fit. You do not even have to glue them in to hear how it sounds.
Two or three accross and a couple front to back
The other choice is to glue ceramic tile to the inside walls. This would stiffen the walls also
Building a new box is the ultimate but not that easy to end up with something that looks good. You also lose the vintage look. All depends what is the goal. Personally I like the vintage look.
With The amount of time Walt put into his Valencia's he could have built a perfect box(if that exits)
Yes -- but I don't have your woodworking skills or tools. I actually thought about a new enclosure -- one that would integrate my JBL tweeters into a nice attractive package. Vu Hoang's Western Electric speakers at the CAF three years ago were beautiful. And sure I could contract someone to do the deed (you) but don't have the deep pockets to pay for it.
Re: Bass Cabinet Stuffing
Posted: November 19th, 2017, 11:30 am
by brombo
I don't know where you live but if it is near Rockville you should consider the Woodworker's Club -
http://woodworkersclub.com