Great bass from a linear tracking arm?

I get plenty of quality bass through my vintage LT-30 and Grado Sonata.

It's not ALL just a matter of cartridge selection. It's simply that most linear tracking arm wands (plus counterweight) have a pretty low effective mass (because most of them are shorter than the standard 9 inch pivoting arms), so you just have to make sure the eff. mass of the arm is compatible with the compliance of your cartridge (low mass arms like higher compliance cartridges.)
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Yes, excellent bass reproduction is possible with linear tracking arms. The Walker arm certainly delivers in this area. Nsgarch is certainly right about cartridge matching, but design of the arm (e.g., bearing rigidity) has a huge impact.

I have no problems with the bass on the Cartridgeman Conductor with either the AT 33PTG or the DL103R. It matches my Schroder model 2 in that aspect.