Hopefully I should be able to get 2.1 right. Or at least use it to reinforce the bass on my existing system.
BTW, does the sub go right down to 20 Hz? After listening to Musica Nuda's acoustic cello music on my system, I realised how inadequate is the bass response of a speaker that is limited to 32 Hz. And therefore the NEED to go right down to 20 Hz.
Also, I am completely new to subs - what is the difference between servo and non-servo subs? After listening to Shanti's two Martin Logan Depths reinforcing - no, make that complementing - the outputs of the Tidal Amea Diacera standmounts, I woke up to what subs can do

Earlier, I naively thought subs are for computers or HTs.
One more Q - what is the meaning of 3 dB at so and so Hz (say 30 Hz)?
Joshua