Avalon Acoustics Isis - Manual (Page 35)

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9.2 Rationale
There is an old saying, "There's no such thing as a free lunch." There are many
trade-offs in speaker design, as in almost any area one can think of. In this
case, the trade off is between transient response and anechoic frequency
response (the speaker's frequency response in an anechoic chamber).
Almost all manufacturers have chosen to sacrifice transient response for
improved anechoic frequency response.
At A
VALON A COUSTICS , we have chosen to pursue a goal of complete freedom
from resonances and stored energy to ensure transient accuracy. We feel
that the resulting gain in areas not traditionally measured results in audibly
superior overall performance.
Anechoic vs. In-Room Frequency Response
It must be remembered that very little listening actually takes place in
anechoic chambers. Placement of the speakers in a real-world listening room
will boost the bass response of the speaker, as explained in Section 8, Room
Acoustics and Speaker Position, beginning on page 19. Since a loudspeaker
with perfectly flat anechoic frequency response will exhibit a low-frequency
boost in a normal listening environment, a loudspeaker with a gradual bass
roll-off (in an anechoic chamber) can exhibit more accurate in-room
frequency response. Avalon loudspeakers are carefully designed taking
these factors into account. When placed in a variety of representative
positions in the room, Avalon loudspeakers will produce deep, accurate, and
unexaggerated bass response, with complete freedom from stored resonant
energy.