I was wondering if there are any comments or recommendations on using the port plug in their SVS's. The biggest difference for me was a 4dB decrease around 20HZ. blue= plug in purple= no plug Is there enough material out there to justify the 16-20HZ gain the plug provides or would I be better served leaving the plug out of the picture? I would be interested on hearing your thoughts/experiences with using the plug. Mike FYI, my setup uses dual 20-39CS+/Samson 1000 & two SPL-1200's for subs.