The Bass
It's a carved top Framus from the 70's.

The Action 
The action is 18mm at the G and 20mm at the E.

The Strings
The E and the A are Eurosonics (lights.)
The D and the G are weed eater lines. .130 and .105. That choice is not pure laziness - these strings work and sound just fine - $3 for a spool of the G (approx. 100 ft of the stuff) and $10 for the D (75 feet of the stuff.) The G lasted just over two years - tone and response intact. I'm still using the D I put on 2 1/2 years ago. Arco is fine - the tone and response are presentable (bear in mind, I'm not performing classical style musics very often) the D is a little fussy but nothing a little attention to technique won't conquer.

The Amps and Whatnot
Ampeg BA-112. I don't like amps.
The pick-up is a David Gage kindly passed along to me by a generous friend.
The combination of the pick-up and the amp seems to get a pretty natural tone with no pre-amp. 
When volume is needed, I prefer the small bullet mike clipped on to the F hole. The one I have and use is an Audio-Technica. It does the trick.