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
The article about car resonant frequency : audiojudgement....
If you want to learn about how to make boxes like these you can check out my video courses on DIY audio : audiojudgement....
Read more stuff like this : audiojudgement....
Music Credits:
"Werq" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
creativecommons...
"The Cannery" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
creativecommons...

[@mikewalker4950]

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!

[@marioarchuleta8723]

Tttttttt lllliiinnnneeee .. Oh man .. I cant find nothing on youtube r any .. Thing than. Theory I swear . but i bet it sounds so dope

[@TheLayinLo]

There are a few videos. My own experiences with TLines were favorable. Put a 15” Skar VVX in one. That enclosure was somewhere around the +10 cu ft mark. Very flat response but nowhere near the output of a ported design 1/3 its size. I prefer other designs in car audio but my computer speakers are TQWT that I built. I get compliments on them often.

[@rolandomota7474]

@@TheLayinLo what is TQWT

[@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!

[@Mr.Robert1]

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.

[@mcintosh.motors]

So, what’s your go to setup for subs? Bouncing between building a 4th order setup or passive radiator with a 10 and 15” setup

[@tobeforgottenisworsethande8995]

Cool. Those must have been the good old days where you could get a job about having a link the amount of experience and credentials in a field. I put in an application at a local car audio and window tinting shop and they said they're looking for people with 3 years of experience. Like couldn't they just teach me? Is it that hard to teach somebody the ropes and pointers with car audio or is it just there being lazy? Because like yeah they might want somebody with 3 years of experience but if somebody has 3 years of experience then why aren't they currently doing car audio? It seems like they're just keeping the same amount of people in the trade or keeping the circle very small because I really believe I would excel at this type of work and I'm a quick learner and this is geared right toward how my mind works but when you walk into a shop to apply and they scoff at you when you tell them you don't have experience but you want to learn on the job then screw that type of arrogance. Like I just need the opportunity to learn in person and hands on because there's only so much you can really relate to and comprehend out of a KZbin video.

[@reganmorben9248]

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...

[@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.

[@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. ;)

[@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.

[@evilinside5984]

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❤️

[@tinysonaudio1408]

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!

[@Mr.Robert1]

that is the reason why if you want to make life simple by a name brand preloaded box that has already been done by experts that have been around for a long time that do this for a living for instance kicker can't go wrong any size in any preloaded box will give you the sound you're looking for without you ripping your hair out of your head and having to do things 10 times and costing you additional money the best part is if you buy something you don't like in the name brand like kicker you can sell it immediately on Craigslist or to a friend very easy to sell something used when it's something that's good not an off-brand piece of garbage like boss or a name that nobody knows. on the other hand if you want to spend the rest of your life building boxes and experimenting with different woofers and you have nothing better to do with your money go right ahead when I had that opportunity I did not have to pay for the equipment as I was working in a wholesale Stereo Warehouse and they let me experiment with all the equipment in order to sell it to customers therefore I knew what I was selling made things great when I did my own install and installation for my son and his friends

[@kapooranuj]

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

[@MrDexaudio]

Orificiul prevazut liber intre portbagaj si cabina nu reprezinta doar " o cale de comunicare" intre subwoofer si cabina. Acel orificiu intervine acustic intre subwoofer si microfon ( cabina ) astfel incat se va comporta ca un nou filtru ( bandpass ) . Similar cu incintele Bandpass ordinul 6 cu dispunere TIP SERIE si nu PARALEL ( ex: incinta bandpass 6th din clip este un BP 6 tip paralel ) . Din pacate o incinta bandpass 6th tip serie este mult mult mai dificila decat tipul paralel datorita interdependentei celor 2 frecvente de acord. Practic frecventa de acord data de volumul liber al portbagajului in raport cu acea gaura prin bancheta va modifica instantaneu frecventa de acord a unui subwoofer bas reflex aflat in portbagaj. Testele sunt interesante, analiza este corecta dar testele in cabina dezavantajeaza anumite situatii. In functie de rigiditatea portabgajului si de izolarea acustica a peretilor acestuia fata de cabina.....acea gaura isi va pune mai puternic sau mai putin influenta asupra anomaliei spontane tip Bandpas 6th Serie survenita intamplator.

[@AudioJudgement]

Inteleg ce vrei sa spui. Asa cum si incinta BP6 cu tot cu portbagaj e practic un BP8. Ideea era cum se compara incintele astea intr-un scenariu real si nu pe hartie.

[@SmalltimR]

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

[@adzmac515]

I really wanted to hear the frequency sweep for each enclosure, not that silly music. Otherwise this was very informative

[@BigSmartArmed]

Nah. Calculate the largest sealed volume you are willing to live with, then take that size and make it into a passive rad box with a lowest tune to even out the fr. Then when positioning sub its place, gradually unload the rad mass to bring up the tune frequency up to optimal response in that placement. That way a single passive rad sub will have the fr and output equal to two equal driver sealed subs. Half the space, half the power, and flexibility in placement/tuning.

[@juststuff5216]

Did you say - Internal dimensions don't matter. Really!!

[@braydenhancock3907]

so far i think im either going to go for a full size sealed, or a passive small, i dont like messing with ports because i seem to always mess up ports.

[@henrycaldwell238]

well remember the cabin gains, that is almost the exact gains added to the 4th order. I was hoping you would catch that. Overlaying the car gain and the 4th order.

[@trev6783]

I really want to learn more about passive radiators.. It just seems like there is a huge lack of knowledge about them except for the super top secret labs of major audio brands. How do you tune them? What size do you need? What does the suspension compliance do? Can you just tack some radiators on to the side of an already built sealed box?

[@Mr.Robert1]

passive radiator does a great job as opposed to using a port if you have the room it does an amazing job although a lot of people just add another woofer as opposed to a passive radiator when it comes to a car I had some home speakers that look like they had two 10-in woofers in each box until one of them blew when I took them apart to repair that's when I found out that it had one 10-in woofer and one passive that speaker had tremendous sound coming out of it considering it was only one 10-in woofer thing sounded great and it was an off-brand piece of junk

[@Forcefed2002]

Typically u need twice the surface area worth of PR as the active driver. You tune the PR by adding weight (steel washers) to the rear suspension section of the PR

[@trev6783]

@@Forcefed2002 Why do you need twice the surface area? I mean what would happen if you added let's say hypothetically, 2 12 inch PR's to a sealed box with 2 15's. Would the tuning be so far off that it would sound bad? would they just over extend? Can you compensate with extra weight?

[@Forcefed2002]

@@trev6783 I don't know - it's just the most common alignment used when enlisting PR's. It's just how it's modeled for a satisfactory freq response curve.

[@style_of_mag6069]

Awesome video! I've watched all your courses on Udemy you've helped me a lot :)

[@chuckymystic]

i have a 10w6v3 its such an amazing speaker.

[@mkatalin09]

That sub that u choose for the demo is perfect for a sealed enclosure because the Qts is greater then 0.4 and smaller then 0.7! Otherwise this is a great video

[@AudioJudgement]

You are absolutely right! And my next video will be about that : Which enclosure is best suited for my driver. But, then again, don't get hung up on these intervals. The extremes are always right. For example a Qts of 0.25 is definitely not good for infinite baffle and a Qts of 1.1 is very bad for a bass reflex. But numbers in the middle can work well with most enclosures. These intervals are guidelines, not strict rules.

[@thingsdemystified]

This is awesome that you did this but why didn't you design the large reflex box with a porting frequency that better augmented the response from the driver? What I mean is that there shouldn't be such a pronounced peak in the mid 30s (which you called a terrible response, but in reality, I think a lot of people would like that) and then a dip in the response. Also, you should have listened to different types of music using each design and then critiqued the results. That would be more helpful than frequency response graphs because we see plenty of those, and we all know the stereotypes of each design. I think a lot of people would be surprised by the actual performance of certain designs if they actually listened to them vs. looking at graphs and numbers.

[@DavidCakl1]

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!

[@Skarfar90]

How would a transmission line (T-line) box fit in to all this. Its main goal is to have a wide frequency band like a sealed enclosure, but with higher output due to being a ported enclosure

[@TheLayinLo]

I don’t think you would see a higher output. That’s just based on my personal experience with them. You can achieve a very wide and frequency band that is very linear. If it was built properly and stuffed and remeasured and adjusted until optimal, I think you’d see response that is similar but more favorable to the sealed box. BUT the enclosure would be larger.

[@Skarfar90]

@@TheLayinLo Yes, that would make sense, as you need a lot of space to make up the line. So, for small spaces, sealed or passive radiators is the better option

[@johnnycorn7225]

Sounds like you need a third order horn enclosure like they use at concerts there's nothing like it.

[@johnmachter40]

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

[@AdnanKhan-eh5sy]

Hi, this is awesome !!!! waiting for new course, it has been very long since last 201.

[@Rowuk2024]

Ports or passive radiators do not extend frequency response. Ports supply a” drone tone” at the tuning frequency. This means if I apply a 25 Hz test tone, the speaker will emit that frequency, but the port will emit the box tuning frequency. A microphone only measures pressure, so it adds the drone tone pressure of the “wrong frequency” with the speaker driver output of the correct frequency. The box is a helmholtz resonator.

[@simagrisiute9192]

Man head down .Best video on this topic

[@ashishkushwaha3812]

Very detailed explanation. Answered most of my questions..

[@Nfscarbon07]

I have a 10" subwoofer that I built a box for, about 1.13 ft³, and it sounded great and everything but decided to build a ported box, about 1.58 ft³, and I used a flared 3" port tuned to about 37Hz, and MAN what a difference that made in volume! I was able to maintain great sound quality in terms of listening to metal music and I get even lower lows, super happy with it!

[@audfrknaveen2256]

In terms of clarity, or accuracy, or transient responce or fast bass for instrumentals drum beats which enclosure is better ??? Sealed is popular opinion and then bass reflex, and then remaining designs. Hope this is right ??

[@srtdoff01]

wow wow wow.. Truly awesome work!! Great explanation. I hope you get a lot more views and can share this knowledge because it will help many people. Awesome 👍🏼 Thank you!!

[@AaronPotokar-ky4cz]

I have a ported box tuned to 34 hz and a DB WDX12G2.4 with a skar audio RP2000.1D in a 2005 Scion xB. I just can not get my tuning right do you have any tips for me? Thank you. New at this

[@bobadingo]

ACOUSTIC ACCURACY IS THE MAIN REQUIREMENT! Not how loud it goes or how efficient it is or how low it goes the object of the goal is to reproduce music to the highest fidelity meaning accurate frequency alignment and minimal distortion. Music is meant to be listened to and enjoyed and not to be used as a low frequency noise maker!! making noise and rattling the trunk lids like 99% of idiots want! Serves absolutely no purpose.. .

[@MarvinConnell]

VERY HELPFUL DATA - THANK YOU - but I'm having trouble understanding the 'In Car' frequency response, because there does not seem to be any Cabin Gain... In fact, there seems to be a 'cabin loss', because the frequency response of the 'flat' curve ported version falls as said frequency gets lower... O.O But I may have an idea as to the cause... When modelling a subwoofer, the Transfer Function Magnitude Graph doesn't give you all the facts - at least not as much as the SPL Graph, which shows you the theoretical output of the sub, whilst catering to the MAXIMUM EXCURSION of the driver... With that in mind, if the xmax is reached at a relatively high frequency - say 45Hz in regards to the ported version - then the projected 'flat' response will fall short\decline as the frequencies being played get lower, & either the amp runs out of the power needed to maintain the same volume with those frequencies(I know that's not the case - just saying), or, the sub's ability to play any louder diminishes as it's xmax is exceeded... >.> So which is it? Why is there no indication of cabin gain? & why isn't there a bump in the response curve at the car's resonance frequency with all enclosure versions? O.O

[@mikelanders6502]

The one major flaw in the design modeling and different enclosures is how each are effected by what is called "Bass boom", which is a peaking rise in base output at lower frequencies that occurs in automobiles. This is not shown in max SPL comparison and certainly not in modeled computer design. Had a frequency response curve been graphed it would indicate this bass boom effect. Because of this effect in automobiles the seal enclosure is not only produces an extended bass that gives the most linear low end frequency response, it is best design for the car and the only design one should consider for sound quality. As the author stated, should your desire be only Maximum SPL, then fourth order base reflex is the way to go. Personally I lean for quality. Fact is there exists little actual music below 40 hz. In Contrast in a home theater application, one would want all the extension one can get for movies, but music and action movies is very different.

[@LenoreMaggs]

as i said before, computer modeling will not and cannot accurately indicate how a subwoofer will perform... the builder will have to experiment with various rudimentary designs in how they want it a perform

[@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

[@anthonykeve8894]

22hz from a 65 ltr (2.3 cu ft) closure?!! Please reply w/make & model driver?! Dayton sell an 8 ohm 12” in their reference series that models to 21hz in a ported 4.6-4.7 cu ft closure though probably more efficient Isobaric* side note - how do I determine the correct PR? This* alignment requires half the closure size as appropriate for sealed or ported**. The same** requires the same diameter & length as a regular**. Does that mean the same size PR?

[@Clobercow1]

Now... Lets see a clamshell isobarick 6th order bandpass box :)

[@channelclosingastrollshave9447]

What about 4 or 5 passives in that box it can be supported on stilts or hung by wire 🤔 🤔obviously with a suitable dual voice coil 2000w sub ran on a 1000w amplifier 🤷‍♀️🤔🤔🤔👏👏👏

[@Hometheaterguyusa1]

Avoid DIY or cheap cookie-cutter enclosures. Buy the Prowedge, or H.O. JL W6 driver-specific cabinets to get the proper volume and SQ.

[@MetroidChild]

6th order, most bandwidth but huge. Passive radiator, makes box tiny. Surely I can't be the only one thinking what I'm thinking?

[@Mart77]

Ok, what about actual music listening? How does your 6th order bandpass sound compared to other boxes?

[@hotdog9262]

would be interesting to see a `small` plugged ported box freq response and db. ive done some testing with different density plugs with good results. so a happy(?) medium of sealed and bassreflex

[@philipeli1192]

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.

[@JonathanDFielding]

Small Bluetooth speakers also use passive radiators so that the speaker can remain sealed in case it gets wet

[@kelvinrandolph4466]

This is an awesome video...THANKS MAN!!

[@koky179]

I need custom box like you have but need to be it smaller im looking at tops 8inch 600wrms or 6.5 400wrms i want loud and deep bass just for listening

[@koky179]

Dd 608 600w rms in sealed box? Dont have room for normal ported box,it will be small custom box following car inside lines.on a 600wrms 2 ohm amp

[@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 KZbin channel. Much love and respect from a huge fan and colleague.

[@srarcade]

Great job testing and providing so much data, this is really helpful for over-analytical types like us to come to decisions.

[@speedpros]

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

[@thatoneguy454c]

Idgaf if its loud. If it sounds like shit than i don't want it. 🤷 Also it's ridiculous that You would put the Test at the end of the video and then play music over it so you cannot hear the difference.

[@igor2030ign]

Nice work. Very appreciated. Fyi: TL sub and rear, front loaded horn or folded horn will easy kill all this kind of enclosures!

[@inkmonster0u812]

Site to explain? Not sure what you mean. I.m building a box for a single 18 in evl. 2 om.

[@igor2030ign]

@@inkmonster0u812 The transmission line and horn are more efficient and more bass effective enclosures. kzbin.info/www/bejne/l4eUqIaCideLask This may explain abit more.... Try to build and when you hear the difference you understand this by your ears....

[@igor2030ign]

kzbin.info/www/bejne/gXS9ao2PpqaGbLc

[@John3K21]

@@igor2030ign Thank you for linking these videos. I just finished watching both of them. For me it's a perfect example of "you don't know what you've been looking for until you've found it." I'm really interested in learning about more efficient builds, and horn style builds is something that just hadn't caught my attention yet. I've seen HexiBase talk about them before, but so far 6th order and 8th order enclosures are all that really stood out to me more before now. THIS is cool.

[@John3K21]

@@igor2030ign Just so you know, I've been hooked on watching MBEnclosures videos ever since you linked his videos above. Haha. Dude knows his stuff about box building for sure.

[@stevejr4185]

My friend love the explanation. Good job. But i want to have a little conversation. So instagram or something?

[@D4K1.]

I have exactly the same bmw 520d , mine is 2010 is that same ?, i have like 100% same, like its copyed and pasted

[@tyjohnson4558]

That's awesome man you put a lot of time into that it's appreciated

[@thecarl168]

the way you mesure the power it give you only the apparent power. not the real power. because you don’t know the power factor ( the speaker load is not necessary resistive )

[@jesusfloresjuarez6739]

Hi from México I have 3 15" Dbxi earthquake. My friend Wich is an ing. Expert in audio, designed 2 boxes for each one, a sealed and a ported. The ported has an aero port of 6" diameter and 15" deep and is enormous, my first thought was that I could not listen to jazz music. But surprise, jazz music sounds better than the sealed box. At 20 herz the sealed is terrible bad. I made my proofs using the same amp and same equ and same power. So for me I prefer the ported box, just if it is well designed.

[@Skarfar90]

I've made a few hybrid transmission-line boxes (pressure chamber followed by a long folded port). All of them have been very good for a wide variety of music, being everything from rock to dubstep.

[@mkshffr4936]

Seven minutes in and no mention of Qts so we have no idea whether the driver was designed for sealed or ported enclosures. My guess is the latter but without that information it is pointless to go further.

[@xanderguldie]

You forgot to mention that a passive radiator usually makes the bass more accurate because of the pressure in the box

[@kidsavage86]

Im about to do a bandpass on a hcca 12 dont think its the best box for it but the builder said it would be best 😅idk

[@stivengarciaflorez3135]

Ola amigo que tan exacto es el winisd en un % de 0 a 100% cuanto le das gracias saludos desde Colombia

[@christhorney]

you really think people interested in subs want to listen to that crap music? i cannot stand it

[@fatstacks89]

What about port area that makes a difference a low tuned small port won't be loud

[@deathwixh108]

this is the comparison video i looking for. glad u explained it all in here. thanks

[@Jamez84]

One star review, lots of misinformation and slow and boring vid.

[@keatonjones6115]

Ive been looking so hard for some info/comparisons like this for a while! thanks a heap, epic work!

[@worldwideteambasscatdownri6963]

You can cut slot ports, just use screws & no glue til you are done tuning

[@VINNY5674]

I've always loved my bandpass box it really had a intense Thump in my suv. And my subs at home are passive I get really crazy lows for movies. I am throwing my sub in a ported box tomorrow in the suv as an experiment I know my mirrors are gonna shift like crazy...

[@clittle1559]

I've always loved 4th order bandpass in the 90s and 2000s seem to make the sub hit lower and able to take more power from one sealed area

[@catalinvintila947]

Super! Ai explicat foarte bine diferențele dintre respectivele tipuri de boxe. Foarte folositoare lecția!

[@shaundavidssd]

I regard to passives , people make the mistake of using one the same size as the driver ,wrong ,8" needs a 10" to dig lower than a 8 can get alone ,try it

[@thingsdemystified]

It's not the size but the amount of air that needs to be moved. If the passive radiator were able to move significantly more than the active driver, then it would work, but typically you should use a larger radiator or two of the same size.

[@garglemaionese]

I believe an unwritten rule is that you can use a passive with same size as long as its x-max is double that of the driver.

[@pimpovic2]

​@@garglemaionesethis. 2x the Xmax, doesn't really matter the size or number of PRs if you can reach that goal.

[@mhnoni]

Really great information, thank you!

[@wwlittlejOfficial]

Awesome vid! Cleared up a few misconceptions fur me. But I really want to know more about passive radiator xes, how do u determine size of radiators, how many radiators and size of box vs free respiratory nose. Since they are small boxes, I imagine many times we have wiggle room to make a box bigger, how does that affect response/output?

[@AudioJudgement]

You just use a modeling software, like WinISD. Change the parameters you mentioned and see how that affects the response.

[@wwlittlejOfficial]

@@AudioJudgement Lol, already on it!

[@mehsan2232]

In short somebody tell me which box wins ?

[@dmitriibugayov6975]

Great video!!!! Thank you a lot!!

[@xXturbo86Xx]

8:29. How? Every single port calculator says that the wider the port, the longer it has to be as well.

[@AudioJudgement]

I'm talking about the box size, not the port diameter. If the box get's smaller and the port diameter stays the same, then you need a longer port to maintain the tuning frequency.

[@jesusfloresjuarez6739]

As a drummer I am, I think the 4th and 6th order boxes are not for me, because I like to hear all the frecuencies of music, you know, I like to feel the deep sound of the 20 herz that the bass drum produces. What do you think?

[@pvosoccer1585]

Okay, Jesus F J, I am not a scientist but I heard some people said (or may be from what I had read in the past) that most people cannot hear the low-end of frequency range like near 20 Hz, but they can feel the vibrations, with their skin or their body. Moreover, most people can enjoy the base as low as 30 Hz and above, so most likely they will enjoy between 30 Hz to 50 Hz, and that most woofers can produce those frequencies very efficiently.

[@jesusfloresjuarez6739]

@@pvosoccer1585 thanks. Is the 6th order box able to reproduce the 20 Hz better than the ported box? If it is so, I would like to make one 6th order box for my Dbxi 15 Wich has a free air resonance of 20 hz. O just tell me please if the 6th order is good for jazz music, I think we are talking about the best SQ box, but let tell you that I am not fan of the sealed boxes.

[@skateboardkid420]

your bass drum is not making 20hz lol

[@johnnycorn7225]

I'm a drummer too and trust me the number one enclosure for feeling the impact and keeping up with the notes properly is a horn 3rd order. It's just a sealed compartment that fires into a horn structure that gradually expands into the listening area.

[@Karizma231]

He said ported boxes are crap hahaha

[@sarahconner9433]

Why did you use "junk labs"?

[@furieux6742]

I found it, I think the movie is cool! Just nice if you test bigger speakers :) 12 "15" inch subwoofers. :). I think that the difference would not be that big, especially since the small speaker by nature does not sound low, especially 30-40Hz, and such 12-15 inches can even reach 35Hz, even though the subwoofer is closed :) I have a pride lp 15 and in a closed 78L sounds incredibly low, 30hz is not a problem, and the pressure is already strong at 35-37hz :)

[@austintyler7991]

I'm really learning. Thanks a bunch Got Morel Ultimo SC 12" inch sub 10hz-900 range. Can I build a 6th order for 16-20hz low & 30-34hz high ? Wonder if to big for truck of car? 40"x18"x 24" is about as big as I can go. Thanks brother

[@noobsterqmdhere]

what if a dual active sub push pull sealed design ? mutliple drivers ported ? / mutliple driver sealed ?/ mutliple drivers with bass radiator as thicc or larger surface and heavier cone ? or basiclly made the same thing as this but with 2 or more active drivers ? looking foward to see more about mutliple drivers n passive radiators

[@mackemacchiato3238]

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

[@ramilrodriguez8340]

Hi. Great experiment. I have an 43L enclosure but driver I have ask for optimum volumes of 55L sealed and 161L vented. The resonant frequency of the driver in 24hz. What’s my best option if I use that speaker in that enclosure? Can I just make a port tuned to lets say 28hz and get decent results even when not optimal or what? Thanks.

[@steves5355]

Just make a gasket for the box when the sub is inside of it. Its really not that hard..auto parts store..or order one from a blank and be able to design your own reusable bix gasket. The first 4th order, "bandpass" box everyone here has seen, if it was prefab, it had a gasket on plexi window..🤔🤔

[@RekhaKhasgiwala]

Excellent job bro

[@michaelfrancis1]

Cheers from Texas! 🤘😎🤘 Thank you for doing this. My son and I have always been interested in cabinet design. Fascinating! All the best M

[@andromedaviewproductionsin4609]

Great Video though, would love to know who wrote that last song when you were testing in the car? lol

[@AudioJudgement]

kevin macleod 😝

[@izaakgray1718]

Not entirely true about FS sir, at FS impedance rises... but then it falls back off, allowing you to get power in again, in free air, or in an infinitely sized IB.

[@DodgyBrothersEngineering]

Wasn't really a fair comparison because some of the designs would have produced a better result with more volume. What would be an interesting test to do would be to do all of the same tests with the same sized box for all of them.

[@butteredchefcheeks928]

Passive Radiator dB - niiiccce

[@manup.3689]

Salut,Cum pot sa iau legatura cu tine? Am nevoie de un proiect pentru o cutie , contra cost normal

[@AudioJudgement]

Salutare! Din pacate nu ofer astfel de servicii

[@martinda7446]

Your videos are absolutely wonderful, I admire your effort and understanding of the physics involved. Bose had, as usual, an ingenious way of supplementing bass in a tiny enclosure. Dr Bose was a true goddamn genius, check out his MIT acoustics course free online. I hope it is still there. I can't imagine adding to the nasty honk the car is already giving you.. 😁. Annoying comment follows: After living with Quad 57s for over 40 years (I have been in the audio industry this long) almost every box sounds horrible. Best having no box at all. ProAc Response 4s were one of my favourite 'boxes' that spring to mind. Stanley Lipschitz is someone anyone interested in speakers and audio should be aware of if they share the view cabinets are a (un) necessary evil. He can elevate your understanding of speakers, boxes and drive units, filtering etc to somewhere well beyond the norm. Bose is the pragmatic, physics based genius. Not sure I like the sound of his speakers though.

[@kenso.1]

the more i learn, the more i dont want to invest any more into building boxes. too many variables and unaccounted engineering to spoil the party. good thing space is always my leading constraint. GREAT video and presentation!

[@mackemacchiato3238]

I haven’t understod WINisd entirely. Is a ported box of lets say 16Liters , is that WITH the port or Without the port? So one and the external volume of the port on top of the 16L? Thank you

[@AudioJudgement]

That’s the net volume. You have to make the box bigger to account for anything that goes inside the box: port, speaker, bracing etc

[@mackemacchiato3238]

@@AudioJudgement perfect:) as I suspected. Just that some calculations needs a yard long port and similar so that got me thinking… will give it a try tomorrow! Thank you for the quick answer!

[@mackemacchiato3238]

@@AudioJudgement i built a vented box today since the db was way higher than the 4 bandpass box as WinISD showed. Otherwise the bandpass had its own rolloff in frequenzy so one didn’t a filter. In theory…

[@CharlesK441]

Great video. Shame the testing was hampered by the opening to the car cabin area. Would it be worth testing indoors for a closer comparison now the ca test is done?

[@ivanvitor8225]

Thanks for information. how would be in transmission line enclosure??