This is a very high power passive sub of bandpass design as only Dr. Geddes can do it. This sub uses a large 15" passive radiator instead of ports for the lowest possible extraneous noise even at the most extreme SPL levels.   This sub can take excessive amounts of power and likewise produce copious levels of sound.  While not tuned for a very low cutoff - about 45 Hz, they can easily be EQ'd to produce bass down to the lowest modes of your room.  LF response is all about EQ and EQ can often require very high output capabilities from the sub without its  "loosing control".  This sub can do that.  Its a true monopole at the very lowest frequencies so it can easily be EQ'd even well below its passband.  This is critically important because no ported sub can do that.

 

But the best part of buying a Geddes sub is the setup analysis that is provided.  With every sub comes a run of a complex room/sub fitting algorithm.  Bass is completely room dependent and just buying a sub (or several) will not ensure a satisfactory response in any given room.  Now you can have the subs custom fit to

your room!