SPK-0SUB In-Wall
Updated July 2011
What’s Loud Enough?
We like subwoofers to produce
at least 96dB continuous
(100dB for high-impact theaters)
throughout their range at the
listening position.
For background music systems,
performance to 85dB is
appropriate.
Volume
First Sub
Second Sub
1,500 ft
3
98dB 103dB
3,000 ft
3
96dB 101dB
5,000 ft
3
94dB 99dB
7,000 ft
3
92dB 97dB
Determining Output
Corner Loaded SPL
Placing the SPK-OSUB low in a corner will yield the
greatest bass output. Adding a second Sub adds 3
to 6dB of output, depending upon how close the
subwoofers are to each other. The chart assumes
the first subwoofer is placed in the corner, and the
second is alongside a side wall.
Wall Loaded SPL
Use these SPL charts when placing the SPK-OSUB at
least 4 feet from the floor or an adjoining wall. This
chart assumes both subwoofers are placed at least 4’
from the floor and adjoining walls.
Volume
First Sub
Second Sub
1,500 ft
3
93dB 98dB
3,000 ft
3
91dB 96dB
5,000 ft
3
89dB 94dB
7,000 ft
3
87dB 92dB
Screen
Listening
Position
Primary
Room
Room B
Determining Room Volume
Room volume is Width x Length x Height of the
primary listening room, plus a portion of the
volume of any rooms that are connected. When
placing a subwoofer in position 1, add 25% of the
volume of Room B. In position 2, add 50%. In
position 3 add 100% of room B.
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