I think by 'True', Adrian is refering to the fact most of Axiom's linup has a flat frequency response and plays back the source as it is was recorded, no coloration. For other 'True' speakers I would refer to Paradigm Studio series for a sound similar to Axiom. Focal has a few in their line up I would call true as do Monitor Audio with their Gold Series and a few others I have heard.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70