In order to get the most performance from these non-optimum
applications we have taken a different design approach. Vehicle
interiors have limited space, so we started our research on making
the most bass energy from a specific amount of space. The key is to
extract maximum energy from a limited resource, cargo space.
We engineered a high efficiency type of ported box, then set
about engineering a speaker to optimize the box energy. We keep the
moving mass low, energy high and add a suspension with high
restoring force to help control cone motion. This means that the
subs will not have to rely on the box for their loading.
The vehicle itself will offer some loading to the system, and
the transfer function will make the system play an octave lower
than the tuning freq. So, if you could find some speakers that
could stay in control below the box tuning, subs that are really
tuned to the box loading plus the car loading, you could design a
system to play low, loud and do it in a relatively small box. That
is the DDbox.
Each Sub Series we make is designed to work in the DDbox system.
Each size sub in the series is designed for the same airspace and
same response. They all get the same motor, the same spiders,
suspension throw and power handling. The 10 inch size will play
just like the 15, but do it in a much smaller space.
^ft = cubic feet | sq" = square inch
All volumes listed are after vent, and subwoofer displacement;
a.k.a. NET volume
This chart is for tuning boxes in the 35-40Hz range.
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