HAven't tried subs with 100s (no need in my 12X12 rooms that I use them in).
Choice of sub will also probably largely depend on room size.
Bigger room-> bigger sub with more power needed. That usually always is the case.
The line I am most familiar and comfortable with from having heard sound good in higher end dealer systems in general is Rel. That is a popular line with the audiophile crowd in general. I am sure there are many other good ones though.
In general, 2 subs are usually better than 1, but 1 can work well especially if big enough and you have flexibility with locationand used with more full range speakers to start (like the 100s) where the crossover frequency need not be too high. Higher frequencies are more directional sounding in nature so a lower crossover point is generally better especially if using just one sub.
Personally, I would rather right size the OHMs to the room if possible rather than go the sub route, but that is just me. You might defer some cost adding a sub later, but not really save much if any money in the end once you do.
Plus the Walsh drivers are full range up to about 7Khz or so, which is part of its magic in terms of coherency. Crossing over to a sub might intrude on that.
Choice of sub will also probably largely depend on room size.
Bigger room-> bigger sub with more power needed. That usually always is the case.
The line I am most familiar and comfortable with from having heard sound good in higher end dealer systems in general is Rel. That is a popular line with the audiophile crowd in general. I am sure there are many other good ones though.
In general, 2 subs are usually better than 1, but 1 can work well especially if big enough and you have flexibility with locationand used with more full range speakers to start (like the 100s) where the crossover frequency need not be too high. Higher frequencies are more directional sounding in nature so a lower crossover point is generally better especially if using just one sub.
Personally, I would rather right size the OHMs to the room if possible rather than go the sub route, but that is just me. You might defer some cost adding a sub later, but not really save much if any money in the end once you do.
Plus the Walsh drivers are full range up to about 7Khz or so, which is part of its magic in terms of coherency. Crossing over to a sub might intrude on that.