Originally Posted by
yggdrasil
I would consider an active crossover between the woofer and mid. A dedicated amp for the 2235 will give you better control over the woofer.
The actual (preferred) tuning can differ from the tuning arrived at with a design program. I would try a few different tunings in both directions of the designed tuning. The cabinet size looks fine for the 2235.
On the money! And, I see you have the signal generator and volt meter so you can run the data and see what's what in the real world; sweep the frequency and record AC voltage across the speaker terminals in convenient increments to generate and plot the actual Helmholtz curve. Tweak the vent diameter and/or tube length to get in the area of 30 - 32 Hz, the typical recommended JBL tuning for the older 15" woofers. Then you can "play" with the tuning, as recommended above, to see what sounds best in your room. Try a closed box too, you may be surprised how good it sounds. JBL used to provide enclosure construction manuals for all this - may be available in the library here on site. Mike