You own a store, you sell 2 brands, which?


Thought experiment:

You run a store which sells used and new gear from any point in history.  The catch is you can have exactly 2 brands.  One of electronics one of speakers. 

Defunct brands are OK as are those current with long histories. 

What brands are they? 
erik_squires
PASS LABS and MAGNEPAN

Both expensive,



I always felt Magnepan was quite reasonable, all things considered.
Can someone explain to me which speakers are not electronic?  Are they things that make sound without the use of any electric input, wires, crossovers, magnets etc?

I've seen pictures of vintage horn like things which somehow physically attach to the source of vibration.