This is a bizarre idea, and if i am on the wrong track, fine. But here's the story: every week i have a session with a great pianist who has a Steinway in her loft which has very nice acoustics. I play solo or duos with her. usually I plug intothe GK + SWR 2x10 set (solid, regular bass guitar stuff) that is there, and don't think any further. But this week through circumstances I ended up playing on the Fender 25R (a $99 dollar open ended guitar combo) With my flatwound fretless the results were very interesting: a much more open tone, direct attack, harmonics that were ringing like bells, a tone that really came alive and off the floor with a teeny tiny dash of reverb. It worked great solo and in the duo setting with the grand paino; in this particular concept the regular bass set sounds very very dull in comparison. I loved it, except for the fact that I knew I couldn't really turn it up for fear of blowing up the speaker with the open back and all that. However, I think the open back of the combo had a lot to do with why the sound was so open and alive. I wonder if the port of a ported cab works on the same pirnciple, except that the goal is different (livening up the low end) . In this case I am looking for a live solo bass guitar tone that can hang with acoustic instruments and speak its own voice clearly in between them . A chamber music concept for bass guitar, solo or in small ensembles, not unlike of the characteristics of an amplified plucked cello. Are there any ideas if&how one could approach designing a, say, 1x10 inch cab that has a port/slat/or opening that would help bring out those characteristics (full range, dynamics, directness, loud and clear harmonics, openness of a full range tone) without being in danger of blowing up the speaker?