🚀 go-pugleaf

Hello, I don't know if this is an FAQ or not, however I thought
i'd ask it anyways.
I understand the basic principle behind class A, AB, A/AB etc.
but i was recently auditioning a threshold amp on a pair of
Thiel speakers. I was asking about the usual specs and the     
salseman said that threshold uses class-A-Stasis Amplification
with "Absolute-Zero" Dynamic headroom. What's the deal here?
     
I've never heard of this before. what does class have to do
with headroom, and even though it had "Zero" headroom it really
cranked for it's power rating.
 
just curious.
ned.
 
p.s. Q: What's the difference between an audio salesman and a
        used car salesman?
 
     A: The used car salesman KNOWS when he's lying!!