![]() ![]() The recording was made with minimalist microphone techniques and it's all too easy to write off any confusion in the replayed sound as a function of the unusually generous acoustic that results. Having high hopes for this loudspeaker we started it off with a demanding track, the opening of Mahler's fifth symphony on Water Lily Acoustics. Distant orchestral bass drum, for instance. And we do mean deep bass: a common demonstration trick is to play bass with rapid impact and rely on that to impress, but what's much harder is gentle, almost background, stuff at near-seismic frequencies. Still, some models do deliver deep bass convincingly. There are some things one just doesn't expect loudspeakers to do, and producing deep bass from small boxes is one of them. Incidentally, apart from the requirement for plenty of Watts, this is not a tricky load to drive. Twin terminals at the back allow for bi-wiring/ bi-amping if required. ATC recommends this be removed for ultimate performance, though we found it negligible in sonic effect. In appearance, the SCM11 is smart rather than beautiful, with wood veneer-effect finish and a removable grille cloth. Meanwhile, at the other frequency extreme, treble dispersion is aided by the 'waveguide' profile of the tweeter. This is very much the expensive way of going about things (a long coil in a short gap is cheaper and much more common) but has distinct advantages in terms of keeping distortion low when the cone is moving a long way, as it must in order to produce high levels of bass. ![]() The main drive unit features a short voice coil in a long magnet gap. Ultimately, though, it's the results that count. The two approaches are sufficiently complex that leading authorities on speaker design fail to agree on them, but reflex loading is generally thought to give slightly better bass extension from a given size of box. The SCM11 is unusual in being a sealed-box design rather than using a reflex port. ATC claims that this both reduces distortion in the critical midband and eases crossover requirements. The ATC's are quiet and effective messengers.Although some refinements - such as ATC's 'Super Linear Technology' distortion-reducing concept - are only applied to upmarket designs, the main driver here is nonetheless innovative in its use of 'Constrained Layer Damping' to reduce resonance within its structure. The Primare will power the SCM40's and with the 40's also featuring the state of the art studio soft dome mid range unit the performance should be stunning. The sound from ATC's is so dynamic that after a while listening at low to moderate levels is more than good enough. I have been using a modestly priced/powered (£275/50w/ch) in many demonstrations with ATC speakers for nearly two years now to show that an amplifier the size of a truck is really not needed unless disco levels is the goal. This is due mainly to those precisely/massively built and very advanced drive units resulting in extremely low distortion levels which help give a superbly neutral, uncoloured and above all a natural presentation. The SCM19's and SCM40's are closed box designs (as are all the Entry Series speakers) and they will quite happily work close to a wall without the sound getting itself in a twist. I did try and call you a few months ago to see how you were getting on but could not get through. hello rick, i bought my atc11's off you last year after speaking to you on the phone, any way are the atc19's and atc40's sealed units like the 11's because i have my speakers quite close to a wall? would the primare be able to power the 40's as its only 100 watt per channel? How many hours have you put on the SCM19's?įowler:thanks for the replys guys. im looking at connecting them up with the balanced inputs to get the best out of them. Thanks for your help craig, but iv got my heart set on the cd31 to match the amp. the bass was so solid i felt i could touch it! ![]() i know from your previous thread that you would like the matching cdp, but if you get chance you should check out the roksan caspian cdp, i thought it went really well with the i30. Glad you're loving the i30, i was really impressed with the improvement over the kandy. i recently had some dali mentor 2's on home dem, and while good speakers with an entertaining sound, when playing something well recorded the scm19's pulled well ahead making the mentor sound a little vague and muddy. i haven't heard the scm11 so can't comment on the amount of improvement but there will be lower bass due to the cabinet/driver size and the scm19 uses a totally different mid/bass driver. if you like the atc sound, then it might be worth a demo. When i was researching my scm19's, one of the only reviews i could find was an old whf one where they reviewed a cd31 + i30 + scm19. ![]()
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