Sealed vs Ported vs High output bass reflex vs Passive radiator vs 4th and 6th order bandpass boxes

In this video we will see the measured results between 6 different enclosure types :
Sealed
Bass reflex
High output ported
Passive radiator
4th order bandpass
6th order bandpass

Music Credits:
Licensed under Creative Commons: By Attribution 4.0 License
Licensed under Creative Commons: By Attribution 4.0 License

[Mr.Robert]

At one point in my life I worked at wholesale car audio Warehouse. I had a ball playing with every single speaker, box, crossover, amplifier, head unit, Gadget that came into that place for the too years that I was there. It was a great learning experience, When I was ready to install my own system I knew exactly what I wanted made things a lot easier for me they would even let me borrow equipment and install it in my car. couldn't ask for anything more. Out of all the sales people that were there nobody really knew what was going on or was even into the equipment so when people would come into buy, they would always come over to me.

[Renrondog]

Wow, the amount of effort to model and then build all these enclosures is phenomenal. You did an excellent job of both. I have always wondered what the differences would be in real life and not just computer software modeling, now I know. Thank you VERY MUCH for your effort and time and spent on this educational exercise. The Best video on this subject by far!

[mikewalker]

Great video! This is the first time I’ve actually seen someone model, build, and measure so many different enclosures. I’d love to see how a t-line compares!

[reganmorben]

Great explanation!
Mostly confirmed what I thought I already knew, the thing I came to realize from this presentation is that I've never appreciated passive radiators enough.
I've been building and installing car audio systems since the late 80s until the early 2000's (before I had to get a real job lol), and I was mainly trained by Orion and Pioneer (not a big pioneer fan, but boy, is their technical training ever good!) and to a lesser extent by the other companies that the various stores I worked for carried like MTX, Sony, SAS, Coustic, Eclipse, Nakamichi, Dennon, Clarion, etc. etc. etc...
I even owned my own upholstery and car audio shop for a few years (super fun, but didn't make much money at it, turns out you cant charge for the full 37 hours you have into a pair of super custom, factory looking, leather wrapped Audi door pods that fit three 6" speakers and tweeters each).
I understood that there were those vehicles out there that allowed you to have enclosure choices, that you needed the driver's TS parameters to calculate and design the optimal enclosure for that driver.

My reality was that 99% of my customers wanted to put 10's and 12's (even 15's and 18's) behind and under seats where they would physically fit but there was nowhere near enough air space.
So my reality was that I was almost always building enclosures for the vehicle not the driver. I mean, I really tried to get as much airspace as I could possibly get, I often used fibreglass bottoms and backs on my enclosures to conform as tightly as possible to the curvatures of the vehicle.
There was some really impressive bass from small spaces and it was tight and clean and those customers rarely blew their subs and were usually pretty happy.
When you sell and install the same gear over and over, you get a really good sense of what it should or can sound like in an optimal enclosure vs a small sealed enclosure. I always knew the sub woofers were limited by their small sealed airspace but that was the sacrifice that had to be made.
Now that I understand passive radiators more, I really regret not having used them years ago in those small sealed enclosures that severely limited their sub woofers.
My systems could have been so much better... So much better...

[evilinside]

Have any of you tryed the Earthquake Slap's passive radiator's? The 10s, and 12s Slap's unit's, have 4 inches= 100 mm of Total= Peak to peak X Max, and the 15 inch Slap's, has 4 and a half inches= 112.5 mm of Total X Max! Plus the Slap's unit's, are designed to perform best in the active/powered subwoofer's mfg. rec. sealed enclosure size= not the ported size, like most people think. Also less cancellation will occur with the active driver(s), NOT on the same plane as the passive(s). The guy in this video did a great job, thank you very much, for taking the time, to do this video for us all❤️

[kapooranuj]

Very very scientific. I can also appreciate the effort, preparation, hours and expenses that would've gone into creating this video. Kudos

[dslynx]

Great video, just note that not only does the passive radiator allow for a smaller box, but it also eliminates chuffing if you have a large xmax.

[philipeli]

In the old days hanging your amps upside down caused them to run hot! I was taught that any position except upside down was ok. You spent a lot of time here, good job.

[johnmachter]

that was of the greatest comparsion in the last decade. big thank you

[mackemacchiato]

What a great video, editing, time spent and all the work with the boxes! Helpful and informative!!

[SmalltimR]

Great video!
Absolutely love the attention to detail and time taken to explain every aspect of the tests - A+

[joshhaimes]

I've just recently come across your channel and I must say it is awesome. Thanks for making these great, informative videos. The amount of time you put into the videos is incredible! I have two comments on the video. First is that most people tune their ported boxes higher. 22.5 is crazy low for car audio. I know you were going for the flat response, but most people would tune in the 28-34 range in favor of output. Second thing is that these boxes all have different group delay so they will sound different. Output and box size isn't the whole story IMO.

[tinysonaudio]

Great information! Very concise and well thought out. Love it when people can model AND build AND be extremely well spoken. Keep up the good work my friend!

[johnd]

Wow, I dont think most people understand the amount of work and knowledge you put into making that video. Great comparison and awsome editing.

To the "know it all your own video.

[PhillipSanthosh]

What I've been looking for many years has been explained in this video very explicitly.Great Job Marcus.Looking for more loudspeaker/enclosure related videos

[Elmojomo]

Fantastic video! You actually explained many concepts that I've been struggling to understand for a while now. Very nice presentation and editing as well. I appreciate the little bits of humor here and there also. You just got a new sub (scriber, not woofer, lol) from this video. ;)

[simagrisiute]

Man head down .Best video on this topic

[DavidCakl]

Wow! best enclosure video on youtube. You got my subscribe.
From all boxes, passive radiator is most satisfying. Its small efficient and have a nice low end and SQ. Really impressed!

[TheLayinLo]

I’ve been a huge fan of Audio Judgement, your website and blog, and have learned so much there. I’m really glad to see you with a YouTube channel. Much love and respect from a huge fan and colleague.

[speedpros]

That was fun and informative, I've never seen all those different boxes or had them explained very carefully. Thanks