For this potential build, I'm looking at using the spare PA310 I now have on hand to build a "small" bass unit that can do 42 Hz and can be carried with one hand (with a handle mounted on top). I basically used the same spreadsheet that I used to design the "Boom Unit", modified to include a center brace for the vent. The sims look pretty decent. I'm wondering if I should go with a higher Fb for a little more midband efficiency, but I can see this just being placed in a corner and covering 40 Hz to 120 Hz. The sim suggests that Xmax will be exceeded just above 100W, but my experience with the PA310 suggests that it can take a little more than that and not sound too bad. Particle velocity at the vent seems pretty low at 100W and surprisingly modeling this alignment as a vented box produces very similar results at low frequencies.
Thoughts? I may end up committing this to wood this weekend. Let's see if I can screw up with that build as much as I did building the "Boom Unit"...
Thoughts? I may end up committing this to wood this weekend. Let's see if I can screw up with that build as much as I did building the "Boom Unit"...