PMA AMPLIFIER SERIES
25
When the speaker is placed closer than approximately 4’ to an adjacent surface (i.e. side wall or floor)
the low frequencies will be boosted. PMA Manager offers filters to compensate for this effect based
upon the approximate distance to the adjacent surface.
“1 SURFACE” - NO COMPENSATION NECESSARY
2 SURFACE LOADING - USE “2-SURFACES” FILTER
1 SURFACE LOADING
In this case, the speaker is suf-
ficiently far away enough (4’ or
greater) from room side wall and
floor to be considered “1 Surface”
loading.
D
side
= 4’ min
D
floor
= 4’ min
D
side
D
side
D
floor
D
floor
2 SURFACE LOADING
In this case, the speaker is close
to one adjacent surface.
D
side
= 0’ - 4’
D
floor
= 4’ min
COMPENSATION FILTERS
