There is a Velodyne thread on AVS now titled "Which one should I get, The Velodyne DD-15 or the DD-18" There were some statements made about the B4+ and its performance in John E Johnson's test of both the DD-18 and the B4+. As this unfolds, please understand any flaming remarks toward either product will be immediately reported... this is for feedback and learning... not war. The poster asserted that since the B4+ could "only" hit 100 dB @ one meter @ 16 Hz with 31 % distortion in the Four ports open, 25 Hz setting THAT... With the 16 Hz setting, the 100 dB (@16 Hz and one meter) maximum would be even lower with two ports blocked... and the 16 Hz setting selected. Is this true??... and why or why not?