In my search for a portable, medium duty, inexpencive, midrange puncy cab. I have decided, the ultimate configuration would be a vertical, sealed 2x12. Not many to choose from out there (why??), so I´ve started toying with the idea of building one. I´ve seen it debated here and I´ve heard, among others, TB-member kringle77´s youtube demos. I like Anyhow, i can easily get hold of 2 Eminence B12a, at a good price.: Nominal Impedance 8 ohms Power Rating Watts 250 W / Music Program 500 W Resonance 47 Hz Usable Frequency Range 43 Hz - 3.8 kHz Sensitivity 98 Which I so far understand will do a decent job? The build should´t be to problematic as I´m used to doing plenty of stuff I´ve never done before . But there is a few questions coming up. Do I want to build two separate (0.9-1.25 cu.ft.) compartments, or keep it open between the two? And why so? I will probably be running this with an Ampeg PF350 or perhaps going all out wit the PF800. If I succeed I´ll probably build another. Ideally I want to be able to choose between running the cabs at 4 or 8 ohms. Silly question, can I wire them using two 1/4" jacks, one in series and one in parallel? Is it that simple?