What, not a MKII???
The "C" stands for additional new circuits which allow the correction of room modes and dampening of obtrusive resonances - and this in pure analogue mode.
ACOUSTIC RESONANCE COMPENSATOR
The FM 268C features these novel circuits which improve the reproduction in any room.
The ARC circuits minimize room modes and other resonances (room modes occur when parallel surfaces create one or more pronounced resonance peaks).
In a typical rectangular room the 1st principal resonance is occurring at 1/2 wavelength of opposite walls (this is why it is not a good idea to listen while sitting close to walls). A 2nd resonance of the walls occurs at double this frequency.
Such resonant peaks are superimposing themselves on the actual music resulting in unnatural boominess and poor low frequency definition.
Large professional studios can ameliorate such room modes with huge attenuators but size, construction limits and cost preclude this for home environments. Usual "hi-fi" absorbers may help with mid- and high frequencies but with reasonably sized domestic absorbers, critical low frequency room modes cannot be attenuated efficiently.
This is where the ARC circuits shine.
They allow precise compensation so that the resonances disappear.
The ARC circuits are unique to the FM 268C and the brandnew FM 266-MKII RC. They are done in pure analogue (no AD / DA conversion nor digital processing) and do not interfere with the music. The integrity of the existing system’s signal reproduction remains intact.
These circuits are also ideal if there are resonances from other sources in the room, e.g. air conditioning or another resonating surface or room component.
The set up of the ARC requires test equipment and experience and is performed by our official distributors - this service is free of charge.
For more information on the FM 268C, please click here.