How to Wreck a Subwoofer Enclosure 

Wow.. you are all over the board this this reply. First talking about a 19" rack (which would be nice depending on the girl) and then talk about 5000 watts which seems excessive for a 5" Tang Band subwoofer but, I am going to play along. and then you disappoint me with your admittance than you use a 2-way crossover. I mean, seriously, are you mental?? 2-way crossovers are so last week. It is almost like you are a bot that has gotten confused, thinking these are car subwoofers and not a low powered speaker system for a Computer. Or, you are drunk and need to take a break from the internet. Either way, I thank you for your comment (well three of them) cause they really help out in getting this video promoted to the masses of armchair audio enthusiasts.

Thanks for your comment and watching the ENTIRE video. :) Isobaric loading describes how the speakers a coupled, They can be front to back, back to back, front to front and back to front. The only thing that distinguishes them is the sealed air chamber between them. Beyond this they can be vented, and many often are. Porting vs Sealed is determined by the speaker parameters, some work best in a ported enclosure, others, like the Linn speakers you mentioned prefer a sealed enclosure. I believe what you are getting confused is a brand name from Linn "Isobarak" VS. an actual speaker loading design. Here is another video from a channel that has been doing rather well in the speaker realm to explain. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BdF7nTU_QOQ.html

@@Hardwareasylum ....yes isobarak is a bass loading system, Linn called it the "Linn Isobarak" speaker which is what most people think of when the word isobarak is mentioned...we call that 'Clam Shell' in the UK...not strictly what the hi-fi world means when they talk about Isobarak..though it has been done... technically your right it is isobarak, the coupling of 2 bass units with trapped air between them...some bass players use clam shell loaded sub bass cabs, yes they are a ported Isobarak style & produce a lot of low end subsonic bass under 20hz..a bit to much but they are fast for the size of 2 x15" bass drive units....if you want the most musical sounding Isobarak bass my experience tells me the both firing forward, one on the baffle & one a calculated distance directly behind, sounds fantastic if done right...i used to design speakers but never got round to Isobarak loading as you need 4 high quality drive units with the right Thielle Small parameters & very little written back then about isobarak bass loading, no internet...yes i have seen ported clam shell isobarak speakers... imo transmission line subs are superior, fantastic just like transmission line speakers, PMC etc... the transmission line produces an amazingingly clean deep bass with a lot less distortion but can't go as low as an isobarak bass loading system ...if i could afford everything i would design a stand mount sized tranmission line 2-way speaker with a transmission line sub in a seperate enclosure underneath, if it's purely bass amount isobarak clam shell is the way to go... for hifi quality tranmission line loaded is my preferred option, depends on what your trying to acheive ,but hard to buy the right bass units...good luck