acoustic fretless bass

My goal was to build an acoustic bass that would be loud enough to compete with an acoustic guitar without amplifying.
So I gave it a very big body (wide and deep). I used a bass bar and a staple, just like a Cello.

The experiment failed. The bass is not loud enough.
But it is pretty! ;-)

Body sides and back: Maple
Top: Spruce 
Neck: maple rosewood maple
Fretboard: ebony with mahogany fretlines
Bridge: ebony
Tailpiece brass and ebony
Tuners: Gotoh lightweight
​Scale: 30"

This acoustic bass was elected Most Beautiful Guitar of 2013 @ Gitaarnet.nl
http://www.gitaarnet.nl/forum/showthread.php?164524-GitaarNet-2013-Resultaten!!!&highlight=mooiste+gitaar