The bass response of the 5s and 7s are so accurately refined that the idea of adding anything to them is as repulsive to me as someone painting a sidebar on a Rembrandt.
The uniqueness of Richard's solution is the extraordinary flexibility for speaker placement within the room and capability to adjust and tune the subs to the room. Controls for not just 11 bands of frequency response, but contour and level as well.
When it comes to the 7s, the bass is somewhat improved of the already great 5s due to higher capacitance in the sub amp power supply, but more importantly, a more accurate midbass driver. Bass can contain a very high bandwidth for example a strong wack on a large drum. The midbass carries a surprising amount of the load for this type of signal.
The uniqueness of Richard's solution is the extraordinary flexibility for speaker placement within the room and capability to adjust and tune the subs to the room. Controls for not just 11 bands of frequency response, but contour and level as well.
When it comes to the 7s, the bass is somewhat improved of the already great 5s due to higher capacitance in the sub amp power supply, but more importantly, a more accurate midbass driver. Bass can contain a very high bandwidth for example a strong wack on a large drum. The midbass carries a surprising amount of the load for this type of signal.