why not raise instead the price of the drivers ? i think that drivers quality set the bar of the performance limit for a speaker
Therefore they are fundamental
Therefore they are fundamental
You can sometimes find the ATC domes on epay or in the buying/selling secion of this forum (there is one right now). Or you could go with the Volt VM752 dome, which is just as good as the ATC dome if you ask me.
Thanks for the kind hint ! kind regards gino
Volt VM752 3” Dome Midrange Driver
quality comes always at a cost clearly
And the 2" version isn't a lot cheaper: Volt VM527 2” Dome Midrange Driver
Attachments show some ITT things.
One of the domes had a dimple in the response that the others didn't.
But for units that are 1,5x my age I'm not complaining. The others were quite consistant.
Attachments show some ITT things.
One of the domes had a dimple in the response that the others didn't.
But for units that are 1,5x my age I'm not complaining. The others were quite consistant.
Attachments
Hi ! yes ... clearly a high end precision driver. The quality is quite evident.
Impressive result indeed. Congratulations !
yes that was the reason of my interest. I have already a pair of the 37mm ITT dome-tweeter ... actually i got confused with the parts number Data are scarce and most of them in german language.
However i saw the ITT 50mm dome used in an old TOTL speakers designed by a quite famous italian designer. This fact for me it is more than enough to be sure of its quality.
Aging is an issue ... difficult to measure.
Thanks a lot for the valuable info.
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I think you're probably right about Westlake, maybe only Quested Im thinking of then.
Proac of course too.. Proac used the ATC in some top models from the 80s and well into the 2010s.. they may still use it now (but Proac make their own horns for it, likely just for cosmetic reasons).
It wasn't really as soon as ATC gained popularity. It was more a recent marketing decision to keep their USP more... unique, I think.
Their dome midrange seems to have a brand image all of it's own, aside from the company.
Not when ATC gained popularity but Quested, PMC and Neumann did.
ATC cut them off at different times, Quested was first years before ATC stopped supplying Neumann or PMC.
That'll be the 420 which was 2nd from top in their line up until ATC stopped supplying their mids for the 500.
This kinda coincided with Neumann taking over Klein&Hummel.
So the K&H o410 became the Neumann kh420 and the K&H o500 was deleted.
Or something along those lines...
This kinda coincided with Neumann taking over Klein&Hummel.
So the K&H o410 became the Neumann kh420 and the K&H o500 was deleted.
Or something along those lines...
1) Close up (few mm) low voltage measurement of bare driver, microphone in the center of the dome, no crossovers iirc
2) Response in DIY waveguide
3) Build in progress
4) Rear view
5) Inside view of motor
Unfortunately the distortion plot of the finished box (shown in previous post) wasn't near what the first attachment of this post might suggest. It is a driver for a monitor that needs to go loud and clean, it seems my home environment requires something else.
I'm still looking for a low-loss suspension, low distortion cone midrange/midwoofer to take its place.
2) Response in DIY waveguide
3) Build in progress
4) Rear view
5) Inside view of motor
Unfortunately the distortion plot of the finished box (shown in previous post) wasn't near what the first attachment of this post might suggest. It is a driver for a monitor that needs to go loud and clean, it seems my home environment requires something else.
I'm still looking for a low-loss suspension, low distortion cone midrange/midwoofer to take its place.
Attachments
Hi ! i have a question on this topic
My drivers are marked on the back LPKM/105/37/120 FTR
I received few days ago a Dayton Audio DATS impedance meter
I immediately checked the domes and with a very sad surprised i have seen fs of about 1kHz on one and 1.5kHz on the other
Also the impedance module at fs is quite different
How is this possible ? do i have to stop buying vintage drivers ? can they degrade so much to be unusable ?
A mid with a fs=1kHz is not a mid It is just a fat big tweeter
I think i will revert to cones
My drivers are marked on the back LPKM/105/37/120 FTR
I received few days ago a Dayton Audio DATS impedance meter
I immediately checked the domes and with a very sad surprised i have seen fs of about 1kHz on one and 1.5kHz on the other
Also the impedance module at fs is quite different
How is this possible ? do i have to stop buying vintage drivers ? can they degrade so much to be unusable ?
A mid with a fs=1kHz is not a mid It is just a fat big tweeter
I think i will revert to cones
Hi and sorry I opened one out of curiosity and i managed to assemble it again and it measures the same as before Good
i do not understand why the coil leads are above the lens ,,, weird solution
I wonder if replacement diaphragms are available like for compression drivers
I am not sure that the high fs could be the result of the diaphragm aging But 913Hz seems way to high for a 2" dome midrange
And the other even more like 1.2kHz
could it be the magnets loosing power ?
suggestions ? to throw them in the bin ?
thanks a lot
i do not understand why the coil leads are above the lens ,,, weird solution
I wonder if replacement diaphragms are available like for compression drivers
I am not sure that the high fs could be the result of the diaphragm aging But 913Hz seems way to high for a 2" dome midrange
And the other even more like 1.2kHz
could it be the magnets loosing power ?
suggestions ? to throw them in the bin ?
thanks a lot