Avalon Acoustics Sentinel - Manual (Page 6)

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1.1 Low Noise Floor
A key element in achieving the sonic goals mentioned in the previous section
is significantly reducing the noise floor. The term "noise floor," in this discussion,
refers to the stray uncorrelated energy that is produced as an artifact by the
loudspeaker. This manifests itself in latent energy below the musical signal
and in deleterious phase noise. Both must be reduced to an absolute
minimum.
Through new proprietary technologies in the elements of the crossover
circuitry, the noise floor has been lowered by more than 25 dB over any
existing design. The low noise principle has also been applied to cabinet
design and construction, where new techniques in resonance control and
careful attention to diffraction and driver coupling effects further reduce stray
acoustic energy.
The overall sonic result is a three dimensional spatial presentation of the
instruments recorded within the context of their original environment. The
background seems black and devoid of contaminating energy, while each
individual instrument breathes into the space in which it was recorded. Truly
low level details, such as wall reflections from the original recording site, are
clearly and concretely apparent. The entire recording environment, whether
natural or artificial, can now be transposed in toto to your listening room.