Avalon Idea User Manual page 28

Figure 8.4 - Same conditions as above, except speaker is 6.6 feet
from the reflecting surface.
occurs at a lower frequency.
By properly selecting the distances to each surface, we can extend the in-
room bass response of the speaker much deeper than its anechoic response.
Please see Figure 8.5. This is because the bass reinforcement provides a boost
which is complementary to the bass roll-off that would be present in an
anechoic chamber.
Figure 8.5 - Anechoic response, and in-room response with the
speaker placed 4.6 feet from the rear wall, and 3.0 feet from the side
wall. Note how the bass response is extended by the room
reinforcement.
Note how the reinforcement now
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