Now, I am trying to go for an acoustic bass sound but without using a preamp. Any advice?
1. I'm thinking of changing the strings to my old D'Addario Helicore Orchestrals.
2. Increasing the string height.
3. Switch - use up for Arco Mode as I understand it gives a sound more close to the double bass.
4. Was also thinking of perhaps using a dampener of some sort. Perhaps a piece of rubber slotted between the strings to dampen them further? Any comments?
All of the above for certain. You could also try cutting as much of the mid frequencies as you are happy with as acoustic instruments have considerably less mids than solids. That is where a pramp would come in handy.

