I have had the ATC C6 for 7 years. No problems so far. Mine makes an audible click when you turn it on or off, and always has done - so I think this is quite normal. It has a built in X-over filter, 180 degree phase switch, level adjustement, and contour lift/base boost, and stereo XLR inputs.
This sub is used in many mastering studios for movie soundtracks and is very powerful and linear. I orginally got it to supplement my bookshelf SCM 20's that, being a small speaker, are simply lacking in the really low end.
I live in a wooden frame house and the distortions from wall vibrations and windows tend to occur well before the soft clipping circuit kicks in and the vibrations can be felt two floors above... so I would say there is enough energy there for most needs (although studios will often use TWO of these beasts)
ATC support their products for decades and provide upgrade paths as future driver improvements come along - so no obsolescence worries from rapid model/driver design changes.
Like other high end ATC speakers that are targetted at professionals rather than consumers; the C6 sub is principally desigined with accurasy in mind, weighs a ton and scores very low on the WAF factor. I am not a studio sound engineer - so I can't comment on how it compares to other pro-gear or the other high end subs you mention, which I am sure are also extremely good.
The way I look at it, if the C6 sub was sufficent to mix many movie sound tracks, such as The Lord of the Rings, then it is quite sufficient for my modest needs.
This sub is used in many mastering studios for movie soundtracks and is very powerful and linear. I orginally got it to supplement my bookshelf SCM 20's that, being a small speaker, are simply lacking in the really low end.
I live in a wooden frame house and the distortions from wall vibrations and windows tend to occur well before the soft clipping circuit kicks in and the vibrations can be felt two floors above... so I would say there is enough energy there for most needs (although studios will often use TWO of these beasts)
ATC support their products for decades and provide upgrade paths as future driver improvements come along - so no obsolescence worries from rapid model/driver design changes.
Like other high end ATC speakers that are targetted at professionals rather than consumers; the C6 sub is principally desigined with accurasy in mind, weighs a ton and scores very low on the WAF factor. I am not a studio sound engineer - so I can't comment on how it compares to other pro-gear or the other high end subs you mention, which I am sure are also extremely good.
The way I look at it, if the C6 sub was sufficent to mix many movie sound tracks, such as The Lord of the Rings, then it is quite sufficient for my modest needs.