Is ATC SCM 19 speakers an all-rounder?
Out of intrest would the mf m6i be up to driving the atc scm 40s room size 3x4 meters musical taste all ,but mostly blues. rock. prog rock + very loud if no one else at home
Hi toyota man
Yes, the M6i is more than capable of driving SCM40 monitors and filling a 3x4 room.
Btw, I'll recommend that you also consider SCM19 monitors as you might find SCM40's somewhat overpowering in this room size.
All the best
Rick @ Musicraft
Musicraft (Derby), Specialist Hi-Fi/AV & Multimedia Dealer
good accurate audio monitoring and good sound reproduction to all 
The minimum impedance of the 19s is 5.7Ohm at 3.9kHz, so they don't need that much current. They need lots of Volts though being so insensitive. The ATC amps aren't even specified @ 4Ohm. The idea of having high current capability is for the amplifier to remain a constant voltage source as the impedance of the speaker decreases; if the amplifier can't deliver the current the voltage will also drop, that's why you see less than double the power @ 4Ohm compared to the 8 Ohm spec on amps.
@toyota man
No problem for the M6i to drive the 40s power wise.
many thanks music craft I will be up your way in june for the download festival castle donington I may pop in do you stock scm 40s etc
they can even be pretty too, i recently saw pictures of some that the owner had rubbed with t-cut(!) and car-polish(!!), and the results were very suprising!
they did look great! sorry for the hijack, but i can anyone link it. i can find it in search
Matt
I would suggest (can't fully qualify) that ATCs may just be a bridge too far for the Leema. They are devilish to drive and you'll need a real gutsy amp to make the most of them, more so if you like your music loud and proud.
Odd as it may seem, I have considered SCM19s in the past as they should suit my room. However, the drawbacks are: If you have a TT with low MV cart the Leema may puff and blow a bit at high levels. Not so with a CDP and FM tuner, but TTs and DVD players can demand more output.
If you are considering a change then my previous suggestions of Totem, PMC, Spendor, MAs, Focals will all be better for a modest 80 watts. Nevertheless small margins.
many thanks music craft I will be up your way in june for the download festival castle donington I may pop in do you stock scm 40s etc
Hi toyota man
Your welcome.
Yes, we do stock SCM40 monitors.
All the best
Rick @ Musicraft
Musicraft (Derby), Specialist Hi-Fi/AV & Multimedia Dealer
good accurate audio monitoring and good sound reproduction to all
The minimum impedance of the 19s is 5.7Ohm at 3.9kHz, so they don't need that much current. They need lots of Volts though being so insensitive. The ATC amps aren't even specified @ 4Ohm. The idea of having high current capability is for the amplifier to remain a constant voltage source as the impedance of the speaker decreases; if the amplifier can't deliver the current the voltage will also drop, that's why you see less than double the power @ 4Ohm compared to the 8 Ohm spec on amps.
@toyota man
No problem for the M6i to drive the 40s power wise.
The gems in the line up are the SCM7 and SCM19 IMO. For a smaller room, the 7's do all of what all the others in the range do without the disadvantages, the integration of the drive units, soundstage and sheer amount of abuse they can take is staggering! 
They are IMO the best new speaker you can buy under £1k (as long as your room is not too big).
The SCM19's are really good, and better IMO than the 11's/40's and with a suitable amp, could provide all the depth in the bass department that I would ever need in a 'normal UK living room'. They dont have quite the integration and delacy of the 7's but bass dynamics and sheer headroom are hard to beat if you need higher SPL's.
They are however very fussy with regards to amplification, as they really do need an amp that delivers a good amount of current. 'The Cure - Same deep water as you' with the Bryston Pre/Power through the 19's is possibly the best I have heard it. Although I would wager that the Active 50's would be awsome, I have yet to have a long demo of them, only heard them brifely at shows.
The main downside of the 19 is the tweeter, the same Vifa unit used in all the 'entry' range, is a very good driver, but a £20 unit that measures very well can only go so far. I would guess the SCM20 may have a big advantage over the 19 in this respect, and may well be one of the best bookshelf designs regardless if you like what ATC brings to the party. I would love to hear a pair at some point!
They are devilish to drive
Where do you get that from? It annoys me that this myth persists, and I suspect that is not your personal experience.
The main difference between the SCM19 and SCM20 is the build (Cabinet) and the tweeter, its a much more expensive unit.
AFAIK the main mid bass driver is the same.
And about ATC speakers being pigs to drive, is a myth, they are quite easy to drive in terms of impedence load, its just their lack of efficiency that means if you want to play at higher levels, you need more power.
My experience with ATC passives suggests they aren't as insensitive as many people say, or ATC are just honest about their measurments, and others aren't.
I had a pair of PMC DB1i's(87db/w), and some ATC scm19's(85db/w). The ATC's played louder at any given amplifier setting.
Arcam Cd33 > Matrix Quattro Dac > Digidesign RM2's on Partington Broadsides > Velodyne DD12 > And some mains cables that make it sound better
I don't know if this is relevant , but I have to crank the volume up to 12.00 o'clock on my Audiolab 8000S and 8000P to get a decent sound out of my ATC SCM 11s . Which is something I found quite surprising after only ever going to 8.00 or 9.00 o'clock on my old NAD 3020 and Linn Kans .
Bit surprised by that as I also use 8000s/px (orig British) biamped to STC19's in an 18' x4.5' room and significantly loud levels are achieved between 10-11 o'clock. This is using Foobar with replaygain, which attenuates the signal on many modern recordings by several db's as well. Lovely all rounders by the way.
I don't know if this is relevant , but I have to crank the volume up to 12.00 o'clock on my Audiolab 8000S and 8000P to get a decent sound out of my ATC SCM 11s . Which is something I found quite surprising after only ever going to 8.00 or 9.00 o'clock on my old NAD 3020 and Linn Kans .
they can even be pretty too, i recently saw pictures of some that the owner had rubbed with t-cut(!) and car-polish(!!), and the results were very suprising!
they did look great! sorry for the hijack, but i can anyone link it. i can find it in search
Matt
I would suggest (can't fully qualify) that ATCs may just be a bridge too far for the Leema. They are devilish to drive and you'll need a real gutsy amp to make the most of them, more so if you like your music loud and proud.
Odd as it may seem, I have considered SCM19s in the past as they should suit my room. However, the drawbacks are: If you have a TT with low MV cart the Leema may puff and blow a bit at high levels. Not so with a CDP and FM tuner, but TTs and DVD players can demand more output.
If you are considering a change then my previous suggestions of Totem, PMC, Spendor, MAs, Focals will all be better for a modest 80 watts. Nevertheless small margins.
They are devilish to drive
Where do you get that from? It annoys me that this myth persists, and I suspect that is not your personal experience.
So what is the answer? Would the Leema be up to powering 19's?
TBH, i was looking at the 7's and 11's at the moment.
What would i need to power 7, 11, and 19? And would the 7 be an improvement over the 602 S3's i am currently using.
I would have thought that amplifiers in £1000 + bracket would be able to comfortbly power most speakers?
Matt
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Out of intrest would the mf m6i be up to driving the atc scm 40s room size 3x4 meters musical taste all ,but mostly blues. rock. prog rock + very loud if no one else at home
Musical fidelity M6i Roksan caspian M2 cdp Atc scm 40s Tellurium Q black speaker cable chord chamelian xlr graham slee novo sennheiser hd598