Ohh that would be nice ,
i want neo drivers , to save total weight, 1/2" , auraco or baltic birch
3/4 is too heavy
i will start with one and i dont know if that can be fitted in a community 15" push pull type of box i posted, or dual 12's to save some space
i need to fit one of those in the back of my car, 48" max height , 20" width and 22 deep .
im choosing PPSL because you suggested and the build is just straight cuts
much easier than a tapped horn
so ppsl is more efficient than single driver tapped horn design ?
also, if for example we use the 3015lf or 3012 lf
and it is rated at 450w rms, means that paralleled i can feed them
900 w rms right ?
since my amp is not that powerfull, i will keep bigger power drivers when later i upgrade to another amp in bridge mode just for that
but at least i will have a low end missing now from my current speakers
and yes, i have only a crown XLS drivecore 2000
so ch1 for the sub and ch2 for 2 tops
Last edited:
You suggested BR, Jbel suggested the PPSL variant of BR.
PPSL is really no more efficient in LF output than BR, it just reduces even order distortion.
TH is more efficient, but requires a larger box to go as low as BR and maintain an efficiency advantage.
The 3015LF is rated for 450 watts AES, which uses a compressed pink noise signal with 6 dB dynamic range. A pair driven with an amp capable off 900 watts in to 4 ohms would be a reasonable amount of power.
"Watts RMS" would imply sine wave, which has only 3 dB crest factor, double the average power of the AES rating.
Art
Yes, 2x900 =1800
.The 3015LF cones already flex quite a bit at 450 watts, probably why jbel suggested a distortion reducing cabinet design.
I realize you are conflicted on what to build, you've looked at several different options.
In "General" but certainly not always....
A TH can and is usually more efficient that any reflex design. aka, more spl per watt.
A PPSL can be smaller than the above TH, and can match the output of a TH, but at the expense of double drivers, double power.
SO, I think the best thing I could do for you right now is help you define what you want, and as the saying goes, loud, low, small -- pick 2. ONLY 2... that's where the trade off's start...
AND, this doesn't even factor in cheap vs expensive.
So your highest priority sounds like small.... so that eliminates the more efficient designs... and means you need more power to achieve the same spl.... but you are limited on power too.
small, efficient, and loud is the holy grail and doesn't really exist....
So, help us out. What is the maximum size and weight cabinet you can accept. Start there. Then what is the max voltage your amp channel(s) that you are going to dedicate to your sub(s) can long term produce. Then you evaluate the options that fit the first two, and see which one produces the cleanest spl for your application.
If it's something you can easily build -- it's a winner
In "General" but certainly not always....
A TH can and is usually more efficient that any reflex design. aka, more spl per watt.
A PPSL can be smaller than the above TH, and can match the output of a TH, but at the expense of double drivers, double power.
SO, I think the best thing I could do for you right now is help you define what you want, and as the saying goes, loud, low, small -- pick 2. ONLY 2... that's where the trade off's start...
AND, this doesn't even factor in cheap vs expensive.
So your highest priority sounds like small.... so that eliminates the more efficient designs... and means you need more power to achieve the same spl.... but you are limited on power too.
small, efficient, and loud is the holy grail and doesn't really exist....
So, help us out. What is the maximum size and weight cabinet you can accept. Start there. Then what is the max voltage your amp channel(s) that you are going to dedicate to your sub(s) can long term produce. Then you evaluate the options that fit the first two, and see which one produces the cleanest spl for your application.
If it's something you can easily build -- it's a winner
Jim,
48" max height , 20" width and 22 deep, low extension i dont care , i mean 40hz or 35 hz low is the most i want, it is for PA not for cinema
weight i dont care for the given dimensions, altough light magnet drivers are a plus, so i will like to have both options in case i want to go with the more expensive route
Now, i was thinking instead of a dual 15 or dual 12 , singles like the SS15
but smaller at the expense of injecting more power to them
what about a mini SS15, with dual 12 drivers or single 12" driver
Lab 12's i heard a lot or 3012LF,
another tought is the 3015 Tqw that bjorno posted
the size is perfect
but can that thing be fitted with dual 12 to get some more spl out of them
or i just a plain no and you need just a more powerful 15" driver
some ideas i just come up with
48" max height , 20" width and 22 deep, low extension i dont care , i mean 40hz or 35 hz low is the most i want, it is for PA not for cinema
weight i dont care for the given dimensions, altough light magnet drivers are a plus, so i will like to have both options in case i want to go with the more expensive route
Now, i was thinking instead of a dual 15 or dual 12 , singles like the SS15
but smaller at the expense of injecting more power to them
what about a mini SS15, with dual 12 drivers or single 12" driver
Lab 12's i heard a lot or 3012LF,
another tought is the 3015 Tqw that bjorno posted
the size is perfect
but can that thing be fitted with dual 12 to get some more spl out of them
or i just a plain no and you need just a more powerful 15" driver
some ideas i just come up with
Thanks Oliver
now that i am looking at all this thing from a broad point of view
and i think i will return to my starting point
that is an SS15 then another one for a pair
Jim
can the dimensions be changed to make a slimmer version of it and maybe taller
to conserve the volume of the enclosure
that is just for easy of transportation purposes
as i have a 20" by 20" rack and it is hard to get the sucker in the back seat
because of the opening shape of the backdoor
so can a "slim" ss15 would be possible ?
so instead of 22x24x30 as stated in the cut sheet drawing
maybe a 18 x 24 x (34....40 )
and if that is feasible, does it affect the response of the cab
?
Also a "slim" ss15 will outperform the Bjorno 3015LF TQWTH ?
i like the 3015LF and B&C 15NDL76 to say some drivers
i need a little truck but as of now that i not possible
now that i am looking at all this thing from a broad point of view
and i think i will return to my starting point
that is an SS15 then another one for a pair
Jim
can the dimensions be changed to make a slimmer version of it and maybe taller
to conserve the volume of the enclosure
that is just for easy of transportation purposes
as i have a 20" by 20" rack and it is hard to get the sucker in the back seat
because of the opening shape of the backdoor
so can a "slim" ss15 would be possible ?
so instead of 22x24x30 as stated in the cut sheet drawing
maybe a 18 x 24 x (34....40 )
and if that is feasible, does it affect the response of the cab
?
Also a "slim" ss15 will outperform the Bjorno 3015LF TQWTH ?
i like the 3015LF and B&C 15NDL76 to say some drivers
i need a little truck but as of now that i not possible
The Keystone TH sub is 45 x 22.5 deep x 26.5 wide. It could be made to 22" deep and 20" wide and still go to 35 Hz, but would loose a bit of efficiency from the "full size" version.
http://www.diyaudio.com/forums/subwoofers/185588-keystone-sub-using-18-15-12-inch-speakers.html
The Keystone is as easy to build as a PPSL cabinet, and a lot less pieces than most portable tapped horns.
bump
Jim,
48" max height , 20" width and 22 deep, low extension i dont care , i mean 40hz or 35 hz low is the most i want, it is for PA not for cinema
weight i dont care for the given dimensions, altough light magnet drivers are a plus, so i will like to have both options in case i want to go with the more expensive route
Now, i was thinking instead of a dual 15 or dual 12 , singles like the SS15
but smaller at the expense of injecting more power to them
what about a mini SS15, with dual 12 drivers or single 12" driver
Lab 12's i heard a lot or 3012LF,
another tought is the 3015 Tqw that bjorno posted
the size is perfect
but can that thing be fitted with dual 12 to get some more spl out of them
or i just a plain no and you need just a more powerful 15" driver
some ideas i just come up with
Jim,
48" max height , 20" width and 22 deep, low extension i dont care , i mean 40hz or 35 hz low is the most i want, it is for PA not for cinema
weight i dont care for the given dimensions, altough light magnet drivers are a plus, so i will like to have both options in case i want to go with the more expensive route
Now, i was thinking instead of a dual 15 or dual 12 , singles like the SS15
but smaller at the expense of injecting more power to them
what about a mini SS15, with dual 12 drivers or single 12" driver
Lab 12's i heard a lot or 3012LF,
another tought is the 3015 Tqw that bjorno posted
the size is perfect
but can that thing be fitted with dual 12 to get some more spl out of them
or i just a plain no and you need just a more powerful 15" driver
some ideas i just come up with
This seems like a good idea to me, possibly loaded with 15HP1030 or 15HP1060 depending on how the wallet feels about the weight. 22" depth should be easy if he is going to use 1/2" ply...
As it says in the first page of the Keystone thread, plans are available in post #97.
Dude put in a little effort to get this done lol
I vote for the keystone design. No I've never heard Art's cabinet, but I'm sure it will cover the freq range you want, (35hz on up) with the power and DSP you currently have available, with ease. A pair of them will really rock most places
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 workshop.
I vote for the keystone design. No I've never heard Art's cabinet, but I'm sure it will cover the freq range you want, (35hz on up) with the power and DSP you currently have available, with ease. A pair of them will really rock most places
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 workshop.
Last edited:
As I mentioned in the pm, a CS-30 style box might be better suited for you. Well not one, but four. Two placed wherever you would like. The other two next to or on top of them.
Post 9 of this thread is a rough plan on what the box should look like.
http://www.diyaudio.com/forums/subwoofers/226235-featherweight-title-fight.html
(4) Lab 12's plus some wood should be around $800 usd. Using 1/2" Baltic birch with bracing should keep weight down on those, and portability as well.
Post 9 of this thread is a rough plan on what the box should look like.
http://www.diyaudio.com/forums/subwoofers/226235-featherweight-title-fight.html
(4) Lab 12's plus some wood should be around $800 usd. Using 1/2" Baltic birch with bracing should keep weight down on those, and portability as well.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.