i just purchased some drivers for a speaker build,a pr of 9" atc bass drivers,my question is can i make a 2 way stand mount speaker with these?? is it possible or impossible,if yes which tweeter? or am i best to do a 3 way,and same question which tweeter,i do have a new pr of vifa xt25's,but which mids do i use,cant really afford the atc mids,crazy money,thanks for reading..🙂
There are several different ATC 234mm bass drivers. I found this info to help any ATC users.
http://www.atcloudspeakers.co.uk/wp-content/uploads/2014/01/ATC-Driver-Specs.pdf
-- Have you measured the T/S parameters for your ATC 234mm bass driver?
-- You must get T/S specs for any basic design.
-- A good design requires extensive simulation plus mic measurements with all drivers in the cabinet.
-- A digital Xover can make the work easier.
TRADITIONAL THREE WAY:
1" dome + 4" midrange + 234mm bass driver
--need ATC T/S parameters to select the best 4" midrange
Controlled Directivity TWO WAY:
EconoWave: SEOS12 plastic waveguide plus a 1" compression driver. Several example designs and Xovers to study. Visit
Home page DIY Sound Group
Easy TWO WAY:
3" full range with 400Hz Xover
http://www.atcloudspeakers.co.uk/wp-content/uploads/2014/01/ATC-Driver-Specs.pdf
-- Have you measured the T/S parameters for your ATC 234mm bass driver?
-- You must get T/S specs for any basic design.
-- A good design requires extensive simulation plus mic measurements with all drivers in the cabinet.
-- A digital Xover can make the work easier.
TRADITIONAL THREE WAY:
1" dome + 4" midrange + 234mm bass driver
--need ATC T/S parameters to select the best 4" midrange
Controlled Directivity TWO WAY:
EconoWave: SEOS12 plastic waveguide plus a 1" compression driver. Several example designs and Xovers to study. Visit
Home page DIY Sound Group
Easy TWO WAY:
3" full range with 400Hz Xover
Attachments
Another comprehensive answer from LineSource again. I'll just add that those drivers don't seem to come with FR and impedance measurements (really? at those prices) so you are also going to have to do that in order do any accurate simulations as well.
i know that these drivers are ATC PA275-234,thats all i know,all this diy thing is totally new to me,my dad was going to use them,he's no longer here,i used to help him build his speaker cabinets,and was going to finish what he'd started.does that model no. help any..
Hi,
They are probably PA75-234 of some sort and you haven't checked
the ATC link provided, to sort out which one, which you need to do.
Seems to me you are way out of your depth.
rgds, sreten.
till i get home i cant check which model they are,out of my depth maybe i am,this is obviously not a forum that helps people,but thanks for kind words streten😡
People here are generally very helpful Paul, they just want you to do a bit more leg work and research. It's the best way to learn 🙂
Linesource has given you a nice simple idea for a two way speaker using a 3" inch fullrange with your atc driver crossed over at 400hz.
This can be a daunting hobby initially but the basics are there to grasp if you want to.
You might be out of your depth but that doesn't mean you shouldn't try to swim.
atc clones
Hi Paul,
I know you've asked for a mid in a different post. But, have you considered using a Morel 3" dome and a Morel MDT30S. I happen to have at least six maybe more of the MDM85 3" dome and a pair of the tweeters. We think the old guy may have been a bit of a hoarder, there is another shed full of stuff.
Check the box or the drive unit for the description, if you are lucky you will have the SB75/234 SC version.
Hi Paul,
I know you've asked for a mid in a different post. But, have you considered using a Morel 3" dome and a Morel MDT30S. I happen to have at least six maybe more of the MDM85 3" dome and a pair of the tweeters. We think the old guy may have been a bit of a hoarder, there is another shed full of stuff.
Check the box or the drive unit for the description, if you are lucky you will have the SB75/234 SC version.
right i have this info,they are stamped ATC PA275-234 STD PD, But re-coned with the later STD kit so they retained a more usable range and they where removed from some opus cabinets originally.
Hi,
Unless you know the specs of the driver or can measure them
we really don't know. ATC don't make PA275 drivers but you
seem to imply they are now ATC PA75-234 STD drivers.
They are PA drivers, designed to be used as lower mids.
If they do say PA275-234 STD PD I've no idea what they
are or what the later reconing did but would hazard they
are still not suitable for a hifi 2 way or 3 way.
Your best bet would be to move them on, unless ATC
can provide definitive specs, and they are hifi sutable.
rgds, sreten.
Got some change?
There are several good tutorials on how to measure T/S parameters. A few coins are often used for a known mass.
Do you have a woofer? midrange?? junk???
Download free sine sweep program + DVM + a couple resistors + small(20-50gram) weight + basic math.
With T/S parameters folks can suggest the best usage(woof vs. mid) and cabinet construction options. You can probably then build a 90% perfect cabinet, and work on the crossover as time permits. There is a thread on designing a decent crossover without mic measurements which you can read.
Measuring Loudspeaker Driver Parameters
T-S Parameter Calculator
SB Acoustics :: Technical Notes
http://www.diyaudio.com/forums/mult...designing-crossovers-without-measurement.html
There are several good tutorials on how to measure T/S parameters. A few coins are often used for a known mass.
Do you have a woofer? midrange?? junk???
Download free sine sweep program + DVM + a couple resistors + small(20-50gram) weight + basic math.
With T/S parameters folks can suggest the best usage(woof vs. mid) and cabinet construction options. You can probably then build a 90% perfect cabinet, and work on the crossover as time permits. There is a thread on designing a decent crossover without mic measurements which you can read.
Measuring Loudspeaker Driver Parameters
T-S Parameter Calculator
SB Acoustics :: Technical Notes
http://www.diyaudio.com/forums/mult...designing-crossovers-without-measurement.html
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