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NEXT-LEVEL CALIBRATION
The settings in the PULSE SUB+ have been set to default levels in order to work well with your
Bluesound Player in most listening environments. However, you may still require some adjustments to
the settings based on placement and personal preference.
The following procedure assumes your SUB+ is installed, connected to the network, and paired with a
Player. If you are using the SUB+ as a non-networked, powered subwoofer, your ability to do next-level
calibration will be limited.
With the Subwoofer audio settings menu open in the BluOS App, use these steps to fine-tune your
subwoofer setup.
1. Set SUB+ volume to the lowest possible level. Set the crossover frequency to the lowest
level, meaning the crossover slider is set all the way to the left side. Set any special audio
features, bass and treble, or EQ controls on your paired Player to their nominal (midpoint or
off) positions.
2. Play a familiar music source that includes substantial deep-bass content over an extended
section.
3. Gradually turn up the volume of the SUB+ until you achieve natural balance between the
subwoofer’s deep-bass output and your speaker(s).
4. Gradually adjust the crossover up to reach the best mid-bass blend with your speaker(s).
This will be the point at which the upper bass retains solid impact and fullness. Boom or
muddiness is the result if the crossover is too high. A thin, ‘reedy’ quality to the mid-bass
such as deep male voices (FM announcers; Darth Vader) is the result if the crossover is too
low.
5. Toggle the Phase control between 0° and 180° several times, leaving it in the position that
yields the fullest low to mid-bass output. You will now likely want to repeat steps 3 and 4 to
check your subwoofer blend.
Cycling through steps 3 and 4 several times with slightly different settings of both the volume and
crossover controls will help you get the most musical performance from your PULSE SUB+. The best
combination is one that yields the most solid very-low bass sounds, without mid-bass boom or a gap in
response between the SUB+ and other speaker(s).
The crossover and volume controls are interactive. Raising the latter while lowering the former can
have the effect of extending deep-bass response somewhat, with a small sacrifice in overall loudness
capability. In general, for well-recorded acoustic music the lowest crossover setting that still yields a
smooth transition between subwoofer and the main speaker(s) is often the best choice, and will promote
deeper low-bass extension.
Note: The PULSE SUB+ volume control is not intended as a bass boost or daily volume control. It is
designed as a set-and-forget adjustment, and not for day-to-day use.
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