There is a difference of 2kg between the S (9kg) and non-S (7kg) versions.
In other words the S versions magnet is quite a bit larger than the one of the non-S.
With one exception, the SCM25, ATC themselves only use the S in 16Ω.
16Ω because according to Billy Woodman there is an audible difference between 8 and 16Ω versions due to amplifier DF.
In other words the S versions magnet is quite a bit larger than the one of the non-S.
With one exception, the SCM25, ATC themselves only use the S in 16Ω.
16Ω because according to Billy Woodman there is an audible difference between 8 and 16Ω versions due to amplifier DF.
This is not correct, Wilmslow only sold 16ohm versions if you wanted an 8ohm you had to ask as a special order, they originally sold the S version as well that only differs in having a larger magnet.I know this for a fact as I bought a pair of standard versions from them and they are 16ohm.Sorry, but I respectfully have to disagree. It wasn't fully clear.
In any case, you can't get the same ATC driver with just a different impedance.
ATC have supplied their 8 ohm driver to a number of companies including Celef and Proac for use in their speakers, but have never released their 16 ohm driver, which is far superior.
Wilmslow Audio are only allowed by ATC to sell the cheaper 8 ohm speaker as part of their DIY 'kits'.
ATC understandably save their 'Super' version for their own branded speakers.
The SM75-150 is 8 ohm, the SM75-150S is 16 ohm, they sound similar, but then Arnold Scwarzeneger and I both have the same roots.
The 150S version is a much more efficient speaker.
Same frame, different magnet strength, different specs. Different speaker.
ATC have an in house version they use that has beter performance and has never been offered to the DIY community, same from their bass units.
In that case, I stand corrected.
My apologies for getting it wrong and confusing the issue!
Are Wilmslow STILL selling ANY ATC units now? I have been under the impression for some time that even Wilmslow had stopped selling ATC drivers, due to a changed ATC policy of not making their drivers available to the DIY market. I do know that Wilmslow still sell Volt midranges, which are extremely similar in appearance, and no doubt very good, but I was led to believe that they were NOT the same as the ATC ones. Anyone?
No, there are no ATC drivers available for diy from any source due to the change of policy you mentioned.
ATC do have a track record of stopping supply of drivers once they perceive that it might impact on their own sales.
Quested originally used the ATC mid but had to find a replacement once studios like Abbey Road started buying Quested instead of ATC monitors. I have the strong suspicion that that is how the Volt dome came to be.
ATC have done the same thing to PMC and Neumann/K&H. PMC now make their own 3" dome which is different from both the ATC and the Volt units.
Neumann/K&H simply stopped making their top of the range 0500 series which was the one using the ATC mid.
ATC do have a track record of stopping supply of drivers once they perceive that it might impact on their own sales.
Quested originally used the ATC mid but had to find a replacement once studios like Abbey Road started buying Quested instead of ATC monitors. I have the strong suspicion that that is how the Volt dome came to be.
ATC have done the same thing to PMC and Neumann/K&H. PMC now make their own 3" dome which is different from both the ATC and the Volt units.
Neumann/K&H simply stopped making their top of the range 0500 series which was the one using the ATC mid.
I have just read the entire thread.
Thanks everyone for providing informations!
But it seems there still remains some uncertainty about the correct crossover.
In the very beginning this schematic was posted:
https://www.diyaudio.com/forums/mul...hematics-clone-atc-scm-100-a.html#post1691331
Later on this schematic was drawn:
https://www.diyaudio.com/forums/mul...atics-clone-atc-scm-100-a-13.html#post3026299
Both crossovers differ just in some resistor-values...
Is the second schematic a newer version which has been updated for the Seas T25CF001 to replace the old Vifa?
Or is one schematic for the SCM50 and the other for the SCM100?
There should be a difference in the resistors as the 12" woofer is more efficient than the 10" woofer. So mid and tweeter should be padded down more in the SCM100, correct?
Besides that, ATC used the SL midrange units. These haven´t been accessable to the public, you could just buy the basic midrange units.
I doubt these would work with these networks, what do you think?
What about the woofers? Do these networks require the SL woofers or could we use the basic woofers with short coils?
Thanks everyone for providing informations!
But it seems there still remains some uncertainty about the correct crossover.
In the very beginning this schematic was posted:
https://www.diyaudio.com/forums/mul...hematics-clone-atc-scm-100-a.html#post1691331
Later on this schematic was drawn:
https://www.diyaudio.com/forums/mul...atics-clone-atc-scm-100-a-13.html#post3026299
Both crossovers differ just in some resistor-values...
Is the second schematic a newer version which has been updated for the Seas T25CF001 to replace the old Vifa?
Or is one schematic for the SCM50 and the other for the SCM100?
There should be a difference in the resistors as the 12" woofer is more efficient than the 10" woofer. So mid and tweeter should be padded down more in the SCM100, correct?
Besides that, ATC used the SL midrange units. These haven´t been accessable to the public, you could just buy the basic midrange units.
I doubt these would work with these networks, what do you think?
What about the woofers? Do these networks require the SL woofers or could we use the basic woofers with short coils?
Awesome!
Any ideas where I can get a copy of the schematics for the SCM100ASL amp?
Cheers!
Wel I want to replicate the connection in my minidsp to start.
Or is this a bad idea ?
any info on how to setup appreciated.
Sorry for the delayed reply.
I have been away from my hobby but now I’m back.
My email is duda.us@live.com
Thank you!!!
I have no experience with Minidsp. Sorry. All I have is some published info on active ATCs.
Hello everyone, I have bought a pair of SCM100 that were used with active crossover and multichannel amp, but I'm only buying the boxes so I would like build the passive crossover by now. Could anyone confirm the updated schematic on page 6?
Also, does anyone know if ATC used the same crossover for every tweeter they used on scm100?
Thanks in advance
Also, does anyone know if ATC used the same crossover for every tweeter they used on scm100?
Thanks in advance
Thanks Andre, but I would prefer to do it myself, I already contacted the guys at Wilmslow and I think it can be built better for the price...at least the ones they are selling now.
ATC monitors have practically always been active. The passive speakers are an afterthought for the 'audiophile' community.
Of their monitors only the cheapest models intended as surround channels are passive.
A mate of mine spent a day listening to various active and passive ATCs for his studio and according to him the passive ones are not nearly as accurate as the passives.
Of their monitors only the cheapest models intended as surround channels are passive.
A mate of mine spent a day listening to various active and passive ATCs for his studio and according to him the passive ones are not nearly as accurate as the passives.