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I N - W A L L S U B W O O F E R S Y S T E M
I N - W A L L S U B W O O F E R S Y S T E M
Speaker Placement
Before cutting a hole in the wall for the IW28S subwoofer, optimal placement must be determined.
Subwoofer interaction with room environments can cause significant variations in bass performance.
Placing a subwoofer in a corner will typically add “level boost” (room gain) at the lowest frequencies. When
the sub is placed in the middle of the room, the lower frequencies will be less affected by low frequency “room
gain”.
For basic calibration considering the room effects at low frequencies, the M&K Sound VA500 Sub amplifier is
equipped with a three-position EQ switch on the front panel, to pre-adjust the EQ of the lowest bass frequencies
in the IW28S subwoofer.
The feature does not affect the subwoofer’s entire frequency range, but is designed to adapt the subwoofer’s low
frequency output in different positions in rooms.
EQ Settings in Practice
EQ 1 is designed to be used when the subwoofer is placed in a mid-room position.
Because mid-room placement has the least influence on the lowest sub frequencies, EQ 1 on the amplifier
is designed to add + 3dB extra boost at 40Hz.
EQ 2 is designed to be used when the subwoofer is placed halfway between mid-room and corner posi-
tion. EQ 2 delivers flat response at 40 Hz, because the typical room contribution of this placement is an
addi3 dB at the lowest sub frequencies.
EQ 3 is designed to be used when the subwoofer is placed in a corner. EQ 3 is designed to reduce 40 Hz
response by -3 dB to compensate for up to +6 dB room contributions at low frequencies in corners.
Set main Power Switch on amplifier back panel to “On”
Set main selector on front to “Off” (LED on front stays Red)
Set “VOLUME” control to “Minimum level”
When turned all the way to the left, the volume control clicks and activates
fixed level.
To set volume at “minimum position”, turn the volume control slightly right
to click and allow adjusting volume level.
Set PHASE control at “0” and CROSSOVER to “BYPASS”
FOR MORE DETAILS ABOUT PHASE CONTROL,
PLEASE VISIT WWW.MKSOUND.COM
In “AUTO” position your amplifier remains in standby, until it receives an
audio signal.
At that point, it automatically switches on and continues operation as long
as an audio signal is detected. After a few minutes without an audio signal,
it will power down to Standby.
With the power switch in the “ON” position, the subwoofer is always ready
to play, regardless of whether a signal is present or not.
Now, play some music through your system, and turn up volume from mini-
mum to approximately 11 o´clock.
Once you confirm your subwoofer is playing, turn the VOLUME control
back to “Fixed level” position and you are ready to perform overall system
calibration from your processor’s bass management setup menu.
Basic Amplifier Functions
Once your main connection and audio connections are complete, you are ready to start operating the amplifier in
basic mode.
Before starting up amplifier, set front panel controls to following recommended default operation positions
Select either Auto or On to turn on the Amplifier.
