Originally Posted by Hambone8255
They look good, but I think because of my room constraints, I am limited to either front porting or passive radiators.
Hambone, at the bass frequencies produced by the ports (or passive radiators), sound is propogating into the room in an omnidirectional manner around the speaker. (See illustration at the bottom of page 9 in this Harman whitepaper
.) So the actual location of the ports/radiators makes very little difference and you will get reinforcement and cancellation of bass frequencies depending on the proximity of the speaker to the wall(s) and other boundaries in either case.
The PSB Synchrony Two I mentioned above, and also the PSB Imagine line, offer flexibility with respect to placement because it's ports come with plugs to enable you to "tune" the bass response depending on the proximity of boundaries. For example, you could plug two ports to tame boomy bass caused by having the speaker positioned fairly tightly in a corner, or leave the ports open for a speaker positioned well out into the room.
You'll probably find Stereophile's measurements and commentary of the "big brother" Synchrony One
useful. (I couldn't find similar for the Sych Two.) In that set of measurements, the trace of each port's output is shown (Fig. 3). Looking at the traces, you will note that if bass management to a sub is envoked at (say) an 80Hz crossover with a 24dB/octave HPF, the ports will not be required to produce a great deal of bass output anyway.
Hope that helps.