In that case forget the keystone (if you're concerned about the weight of a 12" driver)
The keystone is a very large high output 18" horn loaded enclosure. Nothing about it is compact or lightweight.
yeah that i know but there are neodymium drivers in 18" and 15"
sizes
so one light driver for example a 15NDL76
or 15NBX100
is what i mean
Okay but in the grand scheme of things the weight saves by a 15" neo driver will cost you output vs a ferrite 18" driver of the same price.
Look past the weight and add things like handles and casters to make moving easier.
yeah that makes a lot of sense, and besides i was like calculating for 1
but if you build 4 or 8 then the savings start to add up if you get a ferrite 18" like you said and drop the neo drivers
then i can get a beer or 2 with the savings
Or like I said do multiples of the CS30 style cabinet. 4 or 6 or 8 cabinets. That way the system could scale also. For small crowds use two cabinets, then when you need as much LF as you can get break out all 8. Just a possibility.
looks like the CS30 is not not popular and havent see any people
or reports of people doing it for actual live scenarios but for lab testing only
Now, is better to have 2 lab12's cs30's or one with a driver that can take the watts of 2 lab12's
These are just screen shots from my iPad so they're not clear, but save them to your comp and print out in full size, they should be plenty easy to read and follow, and jot down notes as you're building in the worksho
i tried but on the picture with smaller numbers you cant read them on the screen and is worst when i print them
In the thread Maxo posted a link to (guess Maxo isn't reading anything lol)
"The BC18SW115 in the test box are pictured next to a box exactly double the size of the 2x12.
That box, the Keystone sub, is about 6 dB more efficient than the bass reflex designs using either the Lab 12 or the BC18SW115-4 with the same low corner."
"The BC18SW115 in the test box are pictured next to a box exactly double the size of the 2x12.
That box, the Keystone sub, is about 6 dB more efficient than the bass reflex designs using either the Lab 12 or the BC18SW115-4 with the same low corner."
In the thread Maxo posted a link to (guess Maxo isn't reading anything lol)
"The BC18SW115 in the test box are pictured next to a box exactly double the size of the 2x12.
That box, the Keystone sub, is about 6 dB more efficient than the bass reflex designs using either the Lab 12 or the BC18SW115-4 with the same low corner."
Sorry guys, i was reading too much and get sidetracked by the job
( lol ) actually bosses say that you are sidetracked by the "audio crap"...
they dont understand and never will and audio spirit that struggle to be free
so i narrowed my quest to the Keystone and the SS15
now i am wondering if i can cut dimmensions by 2 or 3 inches
on width or deepth and compensate on height to maintain the volume of the box
is there any comparision around here about a keystone and a ss15
btw, there is a cubo sub also around
does anyone have have seen it
Hi maxo,
"...now i am wondering if i can cut dimmensions by 2 or 3 inches
on width ..."
I did that in the singlesheet thread (singlesheet same as SS15), don't remember where or when, but anyhow, here are comparisons between the Hornresp SPL plot for a standard SS15 v. narrowed boxes (narrowed by 1.5"/3"/5"). (The faint trace in the "background" is the reduced box size SPL.) No make-up necessary. Stay w/ the Eminence 3015LF, and the recommended 1/2"nom plywood.
Regards,
"...now i am wondering if i can cut dimmensions by 2 or 3 inches
on width ..."
I did that in the singlesheet thread (singlesheet same as SS15), don't remember where or when, but anyhow, here are comparisons between the Hornresp SPL plot for a standard SS15 v. narrowed boxes (narrowed by 1.5"/3"/5"). (The faint trace in the "background" is the reduced box size SPL.) No make-up necessary. Stay w/ the Eminence 3015LF, and the recommended 1/2"nom plywood.
Regards,
Attachments
Thanks oliver,
on the graph with the 5" more narrow cab
you can see a little dip around 100hz of like 2 -3 db
so i can live with that , that dip you can compensate with eq i think right ?
anyway i will cross my tops at 120 or 150 as thye are 12's
THanks Dude you da man for making those graphs possible!!
Max.
on the graph with the 5" more narrow cab
you can see a little dip around 100hz of like 2 -3 db
so i can live with that , that dip you can compensate with eq i think right ?
anyway i will cross my tops at 120 or 150 as thye are 12's
THanks Dude you da man for making those graphs possible!!
Max.
According to the sim this woofer has F3 at 50 Hz. Try to get a graph of "Combined spl" output which adds the sound coming from the port at tuning Fq!
and that means ..........
Hi Juhazi,
If you are referring to the SPL plots in Post #55 they are correct; they are not for a vented (bass-reflex) enclosure, they are for a tapped horn. I recommend you take a look at the http://www.diyaudio.com/forums/subwoofers/170771-single-sheet-th-challenge.html .
Regards,
If you are referring to the SPL plots in Post #55 they are correct; they are not for a vented (bass-reflex) enclosure, they are for a tapped horn. I recommend you take a look at the http://www.diyaudio.com/forums/subwoofers/170771-single-sheet-th-challenge.html .
Regards,
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