Ultimate sub?


So I have been in a slight upgrade stage recently. I just purchased a b&w HTM2 and I'm shopping for a sub. There is never much talk about subs it seems and so right now my two options are the Velodyne DDPlus 12 and the JL Audio Fathom 112. Are there any other manufacturers I should check out? This sub is an ultimate system purchase so I don't want to make a misstep.
dark_elation
Of commercial subs I haven't heard anything to beat the Martin Logan Depth I - I have one myself.

That's commercial subs - I have found speaker manufactures, if you contact them, often can make you one specifically for whatever speaker you have. By this I mean if say your speaker is ported it would be 24 db per octave at whatever your speaker goes down to - similar if its sealed and you would use 12db. This matching makes a big difference in my experience and I will be getting new ones specially tailored for a new speaker I have on order.

Thanks
Bill
Velodyne DD+ review in the March issue of Stereophile discusses and compares a few other subwoofers which may be of interest.

If you decide on a unit without digital signal processing/EQ DSpeaker processors seem to be well received.

Personally, I'm on my third generation of Velodyne now running two DD12+ and using the manual setup procedure. More than anything the ability to be able to adjust presets, phase, and volume, on the fly from the listening position makes the sub experience fun.