The info is grossly simplified to gain a base idea and understanding of the fundamental principles and not all the examples given work exactly how they are presented, but it's the idea and way of thinking that's important.
Пікірлер: 231
@javierrodriguez38963 жыл бұрын
That ruler example makes a perfect point!
@BoarAudio2 жыл бұрын
Small correction. When the frequency is higher than the port tuning, like you show in 8:49 what happens is that the inertia of the air mass in the port makes system act like a sealed enclosure and that gives some control to the cone and limits excursion. Under the tuning frequency there is no help from the box like you mentioned. Thanks for the great video!
@barevids2 жыл бұрын
Great info!
@alanshayler9413 жыл бұрын
Fantastic best explanation ever. I can now show my mate why his twin 15s are quite compared to my single 10
@kkpage011003 жыл бұрын
Lol 2 10s will blow 2 15s outthe water nobody has the space to put a fat enough port for 2 lmao
@less54063 жыл бұрын
@@kkpage01100 umm...damn near any mid/full sized suv has enough space for a proper sized port. I had 2 Kicker l5-15's in my suburban with a 17"h x 6"h by 20"l port between them. If I remember correctly I had it tuned around 29 Hz. They wanted SOOOO much more power than I had the funds for.
@kkpage011003 жыл бұрын
@@less5406 yeah a suv not everybody has suvs just to put beat in 😂😂 im talking about a regular person that don’t the understand port area part. Usually mfs that think 2 15s is going to blow 2 10s away but shieeet 10s slap hard as shit
@slow88LX3 жыл бұрын
Now give thoughts on 4th and 6th order boxes.
@BrandonBuckaudioanarchy3 жыл бұрын
Assuming you mean bandpass enclosures, they follow the exact same laws of physics explained in the video. The only difference is that they include a steep rolloff above their tuning where a conventional ported alignment does not. And to clarify my first statement, conventional ported alignments are 4th order enclosures.
@MyBlowncobra3 жыл бұрын
4th order is the benefits of both sealed and ported in the same enclosure....6th is 2 ported boxes tuned to different frequency..one side is high the other is low so you get the benefits of all ranges..down side of both boxes is they require more air space...
@BrandonBuckaudioanarchy3 жыл бұрын
@@MyBlowncobra No. Bandpass enclosures aren't the best of both worlds, they're a world of their own. They are purposefully bandwidth limited alignments and limiting bandwidth is seldom a best of scenario. They're useful for high SPL builds or as natural low pass filters but that's mostly a bygone use since we now have very accurate and dependable electronic crossovers. They are by their very nature, bandwidth limited alignments and as such you do not "get the benefits of all ranges" with them.
@NVMDSTEvil3 жыл бұрын
@@BrandonBuckaudioanarchy I would say that depends on how you design the 6th or higher order enclosure and the installation. So you're both correct.
@BrandonBuckaudioanarchy3 жыл бұрын
No. Band pass literally means a relatively narrow passband. It is impossible to design a bandpass enclosure with the bandwidth of any other alignment. You can design a bandpass with wide bandwidth relative to other bandpass enclosures but you will always be faced with the upper end roll off that you don't have with other alignments.
@beenhad70043 жыл бұрын
@barevids , I have been watching these videos for 9 or 10 years now. You have absolutely had a massive positive impact on my knowledge and understanding of car audio. I greatly appreciate all you have done for the car audio community and industry. Because without a doubt, you have definitely helped propel this industry forward more than you will ever know! -Your fellow basshead, Bassabigdeal. ( forgot password & Google won't help)
@JonathanDillonfds-fx3 жыл бұрын
This video deserves a GOLD STAR in the audio Archives!!
@7thsoneli2 жыл бұрын
Excursion and power are cheap today,I love sealed boxes.Great job here on ported.
@KaasMetVlees3 жыл бұрын
love these short vids man, keep on explaining and busting the myths my man
@madrussian4252 Жыл бұрын
By far the best explanation i ever heard. Every word is gold. amazing.. and i been building systems for years
@MickeyMishra3 жыл бұрын
20 years. Many Books. Many VIdeos. THIS video explains the Physics behind it better than any other I have EVER watched. THE BRITS WIN AGAIN!
@piercesteadys66013 жыл бұрын
Short, sweet,& to the point.
@yhprumhsoj3 жыл бұрын
First video I've ever watched of yours and you got my sub, thanks for the content. Very well done 👏.
@Bassotronics3 жыл бұрын
Which sub you gave him? Funkypup?
@wesleywilson438824 күн бұрын
The car audio industry owes u Sam! Great vid
@gianstevens79183 жыл бұрын
The way you compare it to something tangible helps enormously! Very very interesting video Sam, I have indeed experienced this first hand during testing and I knew the woofer moves the least around tuning; But this really clarifies the science behind it and also helps justify purchasing a more expensive, more powerful woofer if you want to loud and stay compact! Thank you so much.
@tubesteak50013 жыл бұрын
Best explanation ever.
@larrymontgomery49022 ай бұрын
Ya know i truly love your videos, they are vary informative. U are a really smart young man thanx for taking time to share. ..
@jasoncoyman60693 жыл бұрын
I was one of those asking for the info on the group. Thank you for making a very informative video. The relay/amp turn on video was another awesome video. Keep them coming. Great stuff here.
@shanecabbage21872 жыл бұрын
Best description I have ever seen/heard.
@2011joser3 жыл бұрын
Superb explanation. I’ve been in the car audio hobby for over 30 years and this is the best explanation of ported boxes I’ve come across.
@Swindez953 жыл бұрын
One of the best explanations of ported enclosure theory as stated. This can also be demonstrated with a slinky in the same fashion as the ruler.
@TimpBizkit Жыл бұрын
I have seen video footage of winning one note wonder SPL vehicles. Craig Butler actually uses 2-4 digital designs 18s in small sealed boxes made of a wide diameter tube. So I can only guess they are tuned to resonate at 70-ish Hz and then the rest of the cabin is designed to resonate - either by standing wave or some sort of bandpass to the exact same frequency, creating that huge one note wonder bass.
@n8skow Жыл бұрын
Bandpass enclosure... the entire cabin is a box, with a sealed and ported side.
@TimpBizkit Жыл бұрын
@@n8skow I'm not quite sure because there is no port to the outside on Craig Butler's video to make the cabin into a front bandpass chamber. You'd have to make a substantial opening to get that big area to resonate at ~70Hz. Making the cabin a half wave and trying to get the sound wave to rebound at the woofers and the mic, so the woofer loads agains maximum air pressure might give some good SPL, especially with a sealed chamber that resonates at the same frequency.
@n8skow Жыл бұрын
@@TimpBizkit it IS a bandpass. The entire opening you are looking through when you see the woofers is the port. Its a very common design on the BIG number builds... woofers in tiny sealed enclosure placed inside a huge ported cabin.
@BrandonBuckaudioanarchy3 жыл бұрын
It might be helpful to add that the reason why you're able to produce such huge excursion in a port with such little energy is resonance. Everything has an F0 or, resonance frequency and that's the frequency at which the thing vibrates the most with the least amount of input energy. I think one of the most useful visual representations of the power of resonance is the collapse of the Tacoma Narrows bridge. The bridge does fine in the wind until the wind causes it to oscillate at its resonance and then, almost suddenly, it self destructs. The same thing can happen to your subs in an enclosure that's improperly designed.
@edgarwideman7372 жыл бұрын
One error that I can't ignore, The speacker does not compress the cabin air as I preceved you described. It creates a shock wave of air which then propogates away from the driver and compresses the ear drum once it arives to the listeners ear. The air as a whole does not get compressed inside the cabin.
@barevids2 жыл бұрын
Roger that!
@PiezPiedPy3 жыл бұрын
Best description I've ever heard 👌
@JonathanDFielding3 жыл бұрын
I have a JL10W7AE in their sealed box and it sounds amazing! Driven by a JL Audio HD750/1.
@davidfuller5813 жыл бұрын
The easiest way to deal with the lack of damping below the port tuning is by using a very steep HPF below the port tuning, but that adds group delay (which ported or passive radiator alignment as a 4th order system already has more than a sealed alignment, which is 2nd order).
@sedon70983 жыл бұрын
Other solutions include using the right box for the subwoofer 🙃😉
@davidfuller5813 жыл бұрын
@@sedon7098 still doesn't fix a complete lack of air spring below port tuning.
@airmann903 жыл бұрын
Excellent description man. I never understood how my small jl w7 sub with a port could be as great sounding as I remember my old 12s when I was younger.
@HS786UK933 жыл бұрын
Short and to the point. Great video Sam.
@MrMaxyield3 жыл бұрын
Learned a lot. And I've been into car audio 30trs...you should definitely make a series...!! You could teach many people lots of information. !!!
@scrapironfish3 жыл бұрын
Awesome explanation! More videos like this please.
@dennisbahati26913 жыл бұрын
That is an exceptional explanation.... ive fully understaood everything...
@1280spoon2 жыл бұрын
I enjoy watching these videos full of great information that can help better understand things
@shean-koklim41973 жыл бұрын
Fantabulous explanation!!
@JaredElliott13 жыл бұрын
Excellent!!! Thank you.
@xchampxownsx45353 жыл бұрын
4th order is so much better, I get both my lows and high Bass. If anyone is going for musical, and you listen to a wide range of music, 4th order is the best way to go.
@B15SDMDESIGNS Жыл бұрын
absolute brilliant explanation!
@jdizzle37403 жыл бұрын
This is an absolute must for enthusiasts to understand. Thank you for this explanation.
@kwonpae-corr43003 жыл бұрын
amazing comparison with that ruler
@CharlesK4413 жыл бұрын
Great explanation! Now I know why my cones hardly move but feels like it's ripping the car apart 😉👍😂
@wiredperformance61302 жыл бұрын
The old school cerwin vega stroker was a good sub to demonstrate the difference between big surrounds and tiny surrounds. Jl subs works best in ported boxes excluding the flat subs. Box design matters more than most think. 4-8w3’s 1000 watts 160db is my best.
@31chh0rn3 жыл бұрын
Thank you, definitely the best explanation I've heard yet.
@martynasmirauskas69773 жыл бұрын
That's an explanation! Good job mate you earned subscriber.
@chadbeverly49263 жыл бұрын
The steel integrity SQL series subs are perfect for sealed enclosures and can even play down to 8 hz sealed.
@schnecks2180 Жыл бұрын
That was a great one! I haven't thought about it like that THX
@workingclassperson21243 жыл бұрын
Right on. Thanks 👍🏽
@SIXvw3 жыл бұрын
it makes me so happy stumbling apon a video about a thing i saw in my facebook groups keep it up man
@indopleaser3 жыл бұрын
top 5 youtuber. love these technical videos, thanks!
@petechongy2 жыл бұрын
Sealed for the win all day long and it sounds so much better without pissing the neighbours off bass inside not much outside. 2 x 12" 600w peak pioneers running 2ohm at 600w rms I can't wait to get dual voice coils and get it down to 1ohm. + ported is tuned to a spefic freq and most will not boom away from the resonant tune.
@chriss41893 жыл бұрын
Amazing video! Thanks for all the knowledge you do a really great job keeping it simple and weeding out all the crap information in car audio in all your videos Again well done!
@AmazonasBiotop3 жыл бұрын
That is great explanation. 👍 Ported design is fun. A natural development in our life long hifi journey is one day we discover that ported designs is FUN but less HiFi. Air is compressible and if we are looking/listening in the time domain when woofer go in the air is first compressed then is escaping the port and make sound. And that is happening AFTER that the note and the cone has played the note. So signal and real event is happening and the cone moves then AFTERWARDS the port makes a sound. WHEN port makes sound that has nothing with the signal from the recorded event that has already been and past. In the opposite with IB/OB/sealed we get the signal and the direct sound from the woofer when the it is happening. So no smearing afterwards in the time domain. That enable us to hear texture and tone and therefore is more HiFi in its real meaning. But ported design is more fun and impressive sounding and who do not want to have fun? 😉🎶👍🥳🎵😍
@cartycartyamplifiersalesrepair3 жыл бұрын
That was well explained Sam keep up the good work Sir nuff respect 🇯🇲 🇺🇸 🇬🇧
@jonbeargenx3 жыл бұрын
In the early 90s I ran a 15" in an open air configuration in a VW Beatle. Not sure about the wattage I had, but I am guessing 350W ish. It was still very loud and rich. Thanks for the video 🙂
@jdizzle37403 жыл бұрын
A friend of mine was doing the same with a Kicker Free Air 15 in a VW Jetta around ~ '98/'99 and man was it loud. It was almost as loud as my 2 Eclipse 12's in a sealed box on about 650 watts. I miss those free spirited days when competition was fun and no one got butt hurt when the Outlaw BASS guys showed up at an IASCA event and the SQ guys swapped build stories with the Outlaw guys.
@jonbeargenx3 жыл бұрын
@@jdizzle3740 I miss those days, I guess my midlife crises has arrived as I am upgrading my car with amps and speakers again :P Not anything super good, but a good upgrade from stock at least. I bought an used older PG amp at 600 watts in 2 ohms, but I am still running a rather bad all in one 12" until I can get a new box and 12" for the amp. Maybe even a 10", not sure yet. :)
@jdizzle37403 жыл бұрын
@@jonbeargenx Same here. I picked up a budget gem JL Powerwedge Max 10 w/250 Watt JL Amp off CL for 75 bucks in great condition, have a Memphis 2/3 way xover for it and run off an adaptor from the factory head unit (want to fix that), upgraded the doors and added Tweeters to the factory location and it sounds pretty good (not like back in the day when i would hit 148-149 db in a low power class, but for my old self, it definitely works for better SQ). Glad to share the, I won't say midlife crises, rather, nostalgic moment. Have a great one boss.
@jonbeargenx3 жыл бұрын
@@jdizzle3740 That's great! Nostalgic for sure :) You have a good one too buddy.
@1goodfixer3 жыл бұрын
Thank you very much Sam. Can't wait for the next one of these videos. Perhaps some more in-depth information on sealed and ported designs...wich if you do it right, should allow a person to understand the relationships going on with 4th order bp, and the love/hate for 4th/6th/7th BP designs in general
@ThatsNotFunnyThatsSick2 ай бұрын
The difference between sealed enclosures and ported enclosures in the car audio industry is as simple as this. Sealed enclosures- multi- million dollar business. Ported enclosures- multi billion dollar business. That is not counting the "music" industries production of computer generated pulses that two generations of people can't get enough of.
@Bassotronics3 жыл бұрын
Thank You for a great explanation. 🙌🏽
@jasonwalters32323 жыл бұрын
U got me intrigued. In some of your videos you sound like a mad scientist with going to engineering school. I'm interested in electricity too but no schooling either. What was the process? How do you know so much
@barevids3 жыл бұрын
Trial and error, and critical thinking. Often just find myself thinking about the workings of different processes and I can usually figure out how and why they work how they do.
@danielmoraes96373 жыл бұрын
amazing work! tks
@DIYAudioGuy3 жыл бұрын
Exactly! A port is a speaker cone made out of air! That's the reason why a passive radiator works You're just using a cone and a suspension with no magnet or voice coil to replicate what a port does.
@doraysmith5 ай бұрын
Outstanding!!!
@redman40763 жыл бұрын
Thank you that was one of the best explanations I've ever heard 🙏🏽👍🏽✌🏽💯
@alvinmiller66753 жыл бұрын
Fantastic video..now you should do one explaining how subwoofers work in the most common types of Bandpass enclosures like 4th and 6th Order Bandpass enclosures!
@bsams3827 Жыл бұрын
A great explanation of how subwoofers and all types of enclosures work can be found on KZfaq channel hexabase. He is an acoustic engineer and very good at explaining the concepts of this topic. He is very thorough and technical.
@tonyfauker34113 жыл бұрын
"WE'RE NOT WORTHY, WE'RE NOT WORTHY" 💯🔥
@goobisoft48732 жыл бұрын
Best explanation for sealed vs ported even audiophile couldn't explained this any better 😂
@dreopro56113 жыл бұрын
Very informative.. thanks..bv
@kris-english3 жыл бұрын
Thanks brother!
@justScrollin06273 жыл бұрын
Took us to school and we didn't fall asleep during class! Great video Sam😎👍
@Tekjive2 жыл бұрын
Great way to explain it, great vids bro! PLEASE explain the Pros vs Cons is a Bifilar voice coil ...from what I read it’s more SQ/SQL based vs SPL, and I’m rebuilding my Alpine SWX-1243D which uses an inset (inner/outer wound) voice coil, so I need to replace it with something almost as good and thinking an 8 layer flat alum bifilar is the way to go ...would really appreciate your input homie.
@josephsaucedo86913 жыл бұрын
Yup because most people including myself doesn't understand how everything fully function the why you do. It really amazing the amount of thing you understand and can explain for your age. It takes a lot of passion to learn as much as you have and have a full understanding of it all impressive well done 🎶👍👌✌️💯🥂
@paulgriffin39413 жыл бұрын
Do you repair? Home cinema amplifiers? I have a sunfire cinema grand 5 channel power amplifier And 1 channel is shorting and the power level needle on the front is not working also. I'm in the west Midlands if you can
@tolgadabbagh18772 ай бұрын
perfect and thank you .
@mikehonda79343 жыл бұрын
And for those of you that might inquire, the same theory applies to Passive Radiators, but your tuning is based on the cone mass, and cone displacement.
@Steve_Just_Steve3 жыл бұрын
Was just wondering that exact thing. Thx
@mikehonda79343 жыл бұрын
@@Steve_Just_Steve No problem
@barevids3 жыл бұрын
Damn I knew I missed something!
@mikehonda79343 жыл бұрын
@@barevids All good bro. It was all about ports. Passive Radiator can be the next video. The video is for sure spot on. Great work man. Waiting for class though.
@dennycote63393 жыл бұрын
Notice, as you increase the frequency you shake the ruler the point the ruler spins around approaches the bottom of the ruler. At ‘tuning’ the bottom of the ruler rotates around the point you’re holding.
@garyclemmons10733 жыл бұрын
Lol “..some base information” I see what you did there. Thanks for the video. I shared it to a bass group I’m in.
@The420chemist3 жыл бұрын
Nice explanation
@bradgilpin97403 жыл бұрын
Awesome video bro! Thanks for the knowledge!
@fracampof3 жыл бұрын
Great explanation , waiting for part 2 💪
@adamdorris40813 жыл бұрын
I like the ruler thing.
@StarBoimuzic3 жыл бұрын
Can you explain how this can be applied to band pass enclosures
@ryanwaege72513 жыл бұрын
Like he said, the sealed side acts like an air "spring" so the sub gets help controlling the back stroke. And the front ported side still acts like the ruler, BUT you only get output at the end (port) of the ruler, and almost all frequency outside the port frequency is lost. I can't remember....I think it's a 3db increase at port frequency vs if you erased the sealed side. This gets complicated by are we talking 4th or 6th or X order?
@StarBoimuzic3 жыл бұрын
@@ryanwaege7251 when I made the comment I was thinking about a 6th order and how both sides being ported would affect the sub movement
@ryanwaege72513 жыл бұрын
@@StarBoimuzic I was going to guess that, didn't want to assume! Take his example of his fingers holding a ruler but add a second ruler pointing up/opposite the first one. Front and rear chamber (ports) both amplify output at the port frequency/ resonance, reduce output at other frequencies. No cone output, just port. Keep in mind, while the sub hardly moves at port frequency, everywhere else it is working against the enclosure. In other words, excursion, lots of it, usually followed by blown sub. Because bandpass also obscures the sound of the sub's coils performing ritual suicide. Ask me how I know. 😁 Of course, you also clip the amp for max gains in a competition. It all increases those dBs but like a tuned engine it becomes more fragile because of the increased output.
@ryanwaege72513 жыл бұрын
Forgot - because of the out of port frequency issues with the sub, always pair a bandpass box with a band pass EQ filter that matches. High and low pass to keep the sub from killing itself.
@ryanwaege72513 жыл бұрын
@@StarBoimuzic Read your reply again, specifically how it affects sub movement. The sub will again move less the closer it is to the port frequency. I only saw 6th order in competitive setups where both sides were tuned the same but I gather you can actually tune them different so you can make 2 different bumps in frequency response, one from each side. So...like 2 different length rulers.
@Marcel1984nl3 жыл бұрын
Thanks for this great explanation, it keeps me busy and food for thought. ;-)
@Michael-cb1pr3 жыл бұрын
Thanks a lot. I understand exactly what is happening now.
@BenaresDarkness3 жыл бұрын
I currently have a Resilient sounds team 15 it's not powered up yet I'm still saving money for an amp and electrical.
@gazzacroy2 жыл бұрын
a very good video. top stuff fella :)
@jayb89413 жыл бұрын
Amazing explanation 👏👏👏
@russellcrabtree5314 Жыл бұрын
Your explanation verifies the approach at which subwoofer to get determined by the rear subwoofer cone that shouldn't be blocked by the subwoofer frame or basket. For instance CAB 18s and Mmats 12 Juggernauts. Get the picture?
@Gomez5613 жыл бұрын
This is the best explanation I’ve ever heard, period. Haha! My understanding of ported boxes was way too basic… until now. Thanks dude 👍🏼
@chrisvinicombe99473 жыл бұрын
Good chat m8 you explain things well
@mattroadfeldt90123 жыл бұрын
Thank you for this knowledge
@TradeWithTraderIQ3 жыл бұрын
Wow I feel soo much smarter now!!! So if the port is bigger it can create more pressure?
@christinaknight55693 жыл бұрын
Great information sam i learned alot
@catherineharris47463 жыл бұрын
Outstanding!👍👍👍
@v12alpine3 жыл бұрын
Can you explain why larger sealed boxes play lower than smaller ones (and hence seem much louder)?
@FSXgta3 жыл бұрын
It's the alignment. Bigger makes the resonance frequency lower. Look up Sealed Qtc
@salvatorehayes27533 жыл бұрын
🤯 When You Started Swinging That Ruler. And Then Excursion For Bandwidth. So Awsome! I Play My Subs At Full Excursion At Tuning On My Ported Box But As Soon As You Go Out Of That Tuning It's RIP Suspension! I Have To Have A Very Aggressive Roll Off Hz Curve On All My Music I Edit For Demos. The Goal Is To Have The Same Excursion At Tuning And Same Excursion Above And Below. If You Dial Your Db Curves At Certain Hz Trailered To You Subs Tuning You Get Some Killer Longer Lasting Demos With Alot Less Manual Bass Knob Control lol. It's More Complicated Then This Too. Because Even Though You Keep Your Mechanical Movement Uniform The Coil Thermals Are Not.
@justyna42762 жыл бұрын
Let me know if you ever come to Portugal 🇵🇹
@dustypotter9263 жыл бұрын
This reminds me of Pete (hexibase) videos on box orders he does.
@JavierDuque3 жыл бұрын
Only diffefence is that this guy explains much better without using so many terms and words regular people cant understand lol
@vincentrusso43323 жыл бұрын
Sam doesn't use parables. He gives a direct illustration with elementary concepts that anyone can absorb an apply. Granted, high end animation is awesome, ...still waiting on that transmission line illustration, and pros and cons thereof.
@zaggasworld18013 жыл бұрын
wicked info mate appreciate it
@cdbennett2332 Жыл бұрын
So it's possible to reach a point where, in a sealed box, power handling doesn't matter? Sealed boxes are somehow limited and it doesn't matter how much power you throw at your sub it won't get any louder? From my understanding it's not only how far a cone moves but how much force it's moved with that makes pressure. That pressure would have benefit in any enclosure wouldn't it?
@ChrisProvazek3 жыл бұрын
oh snap! Boy got that legend of zelda hat in the background!
@czabinator2 жыл бұрын
Thx!
@kenabi3 жыл бұрын
and thus why transmission line enclosures can provide ridiculous low end with no 'massive power' ever involved, when done properly. space is the only issue.