Grakesh,
to my knowledge the CAV 50 espouses a minimalist approach, hence a remote is, unfortunately, not an option. I understand that a CJ pre-amp and amplifier combo would not be constrained by this limitation.
I cannot find a subwoofer out on my Conrad Johnson, but perhaps better people than I can identify how does one go about connecting a subwoofer.
The Conrad Johnson CAV 50 drive my Totems in a 13 foot high ceiling and some 1200 sq.ft. of surface area beautifully (i.e. tremendous synergy). Bass, for a monitor, is, in my opinion, very satisfactory.
Part of the appeal of the Totem Model 1s is their coherence: no register dominates the other. Adding a subwoofer will no doubt help you to experience the lower octave and a half, but, I believe, at the expense of a well-balanced sound.
I listen to vocals, instrumental, classical, baroque, jazz some pop and rock. The medium register magic delivered by the CJ & Totem combo serves female vocals and acoustical instruments extremely well.
In any event, an audition is a must before you make a call either way.
Cheers,