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? 
Samsung?  That gets you all the Harman holdings: Revel, JBL, Mark Levinson, etc.

Wilson and Luxman

in front store

every thing else in the back of the store.

AG 🇦🇺
McIntosh and JBL because together you can make great stereo and home theater systems. I’m including Synthesis by JBL. Both brands are $$MONEY$$!!
The point?
We don’t need no steeking point.  

Dynaco and Southwest Technical Products