Sealed vs Ported speaker boxes "The age old question" Lets discuss
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- Опубликовано: 13 сен 2024
- In this video I show you the mechanics of a subwoofer box when it is ported vs sealed. And we plan on showing the differences visually with a Term Lab mic, But I wanted to take a moment to show you and hopefully you can see I am getting more comfortable behind the camera.
Sealed or ported, the choice depends totally on whether you listen to low sound instruments. I listen to orchestra. I love cello, contrabass, tuba etc. Therefore, I chose sealed. If you concentrate on these low frequency instruments, you will not choose dirty distorted low sounds by the ports. Some worry about portion of low sound. For this reason, I even created sealed box pair with four 10 inch woofers.
when i was studying this i always referred to bandpass as a one note thump monster lol. i really want to get back into building but life keeps taking weird turns. great vid as usual.
Got the SC4 from DD Audio.Very nice piece Random,thanks for the suggestion.Will be interesting to compare the sound differences from this and the high level inputs of the processor.
I'm having flashbacks to math class. The moving camera makes me more dizzy than I already am! That's a nice looking speaker box. You need to put those fellers to work.
Put a sub in a bigger sealed box and give it more power, will better than ported on every category.
Exactly true facts
Lol, great info, thank you. Gave me an excellent laugh at the end.
in the past i was learning from car audio "cookbooks" and it was showing how to do the math by hand and port set ups etc etc. I may be getting back into it if time and space agrees lol. Most of my literature got burned up in storage so i have to either buy it all over again and make another set of notes or find a site that the info is explained as in the "cookbooks". Any advice? Your videos are great and explains stuff that is probly not in the books but I'm starting from grass roots so I'm trying to work from both sides...learning from the experienced and my own figurin.
It's not in the book(s), because what this guy is spouting is not worth listening to!! If it was, it would be in those cookbooks.
You know I didnt see this post and I do apologize. There are alot of great sources for this. DD Has a simple math that alot like but I call it stinky woofer math because it has to allow for a long break in period before the woofer can perform with such large ports. But a simple good rule of thumb would be 12 dived by airspace to get a good measurement of surface area needed for the port and then your length is used to determnine the tuning frequency from that point.
I find this number is very universal to the most common ports that work well all around. As for an exact math and journals I think Parts express would be a good start to get some reading material with designs to work and learn off of. Then with technology today keeping your cookbook journal should be easier by emailing it to yourself or keeping it on a cloud surface, and as fort he guy below me he doesnt understand youtube.
I can do a 10 hour seminar and explain this, Just like the old folks do all the time and your going to have 15 views a year because people are simply not well rounded to spend the time to learn. I see analytics on these videos that he does not and the attention span even on 20 minutes of video where I took the time to keep more information in them gets 3 minutes of average watch time. Talked to a few professors that have done much longer videos and they say either a video has very little views or only a few minutes for every hour they put into them so that is why you see less and less people willing to put the time into them.
Also a good video by Barvids that spends enough time to break it down but still keeps it to where you if you have a basic understanding you will learn. Great guy and his projects may better suit for what your asking Green bee. And again sorry fort he late response.
the sound of bass from a sealed box is very nice, tight and controlled booming, the sound curve is more linear, but let's face it, most of us like bass enough to add subwoofers so we want that SPL that only ported boxes can deliver
Yeah was kinda the point of the video. Didnt make the video for audiophiles, made it for the truth, we want the most we can get from a woofer and that requires a ported box almost 99% of the time. Thanks for at least seeing that.
Use half your available space with a band pass enclosure for the lows then use two stereo sealed for everything from 50 to 100 on a two channel stereo bass amp. Thank me later
Hey Random,In using a Zapco DSP in this latest build and I'm wondering if I should use the high level inputs or the low level RCA's.I'll be using the Factory low level signal which I measured at 3.2v with a -5db test tone and 6.2v with a 0db test tone.At the moment it's going into the low RCA's and things sound descent at lower to mid levels but once we crank it there's distortion.I have not EQ'ed,time aligned or any major tuning yet,only set basic crossovers and gains by ear.
I dont know the sensitivity of the Zapco DSP, but from what your telling and describing it sounds like you have too much voltage driving into it. If that is the case you may need to switch over to RCA signals. If I were to do this I would use a device such as the SC4.1 from DD that will allow you do drive the RCA lines to the perfect signal source.
Random Audio Guy Ok,I understand what you're saying.Let me ask you this,if the voltage is too high for the RCA inputs now,why couldn't I just use the high level harness inputs instead?The processor has both high and low level options for input.What would be the difference in my idea and yours of using an external signal attenuator?
I bought the SC4.1 from DD like you suggested.It looks like a very nice piece.I will try using the high level inputs on the DSP first and then try the SC4.That way I'll be able to hear any differences.
thanks for the vid it did help with the bandpass question I think I will just go with a slot port box as I do listen to a large range of music. again I do ask for the mathematics on ports. I have an app for it but not everyone does. I think it would make for an interesting video
Well as you can see we do make videos on what were ask so as I make new box videos Ill take the time to explain more. It seems people watch an average of 4mins 10 seconds of my videos. I guess I can make them longer and the people that want to watch them full length can, I edit out so much to fit in the 5 to 15 min time frame. Even to the point I try to stay under 10 or less. But Ill make sure the extras that explain like that stay in the videos from now on. Thanks for supporting our channel. Means alot to us.
Instead of saying witch type of box is better. Try asking if you are using the correct box for your application. Certain boxes cover different ranges and serve different purposes.
I somewhat regret posting that video because I wanted to touch on the subject and I realize just as I do at my shop its a very tough question and requires a very long process to explain correctly. You are correct, its better to to use it based on application, and because my experience comes from 200 to 1 of people likiing ported sounds better. So the question will always be in their lap but I also find people looking for sealed sound typically are also willing to watch a 1 hour video that explains it in alot more detail.
Thank you! This helped
Thank you! Glad it helped some.
Cool video. Can I use any subwoofer speaker for a sealed box?
Physically yes but its parameters are going to determine which box is best suited for it.
I tend to lean toward JL Audio for sealed enclosures as I feel they sound better than most sealed subwoofers I hear. But this is a subjective question that you can get different opinions on but if you are going to do a sealed enclosure then find the sub that works best in that type of enclosure. Digital Designs for example tends to favor ported enclosures.
n keep them coming!!!
wow, what a video. anyone intested in this topic should watch barevids youtube video on impedance rise. and also watch all shawn k dooley video. there will you learn about 4th and 6th order bandpass boxes
Barvids is a good channel. He goes much further indepth than I do and I also highly recommend anyone that wants to further learn this subject watch his video. Great guy.
dd rocks too
Random Audio Guy I'm very new to this subwoofer game shit. I found 2 8" JL AUDIO old school subs in a sealed box. but anyways I drive a zr2 blazer two door I'm wondering would it give me more bass porting the box? I listen to mostly rap for the subs and on occasion rock, mostly my subs are turned off. but let me know please any idea because I'm about to drill holes into the box tomorrow I got um for free so I don't mind if I waste some power drilling a hole or two
Yes, overall it will be louder. But drilling a hole in a box is not porting them. How big that hole is and how long the port you put in it determines its tuning frequency. You have to figure your airspace up which is the internal dimensions of the box, Using Width, Height and Depth and multlplying them. So lets say 24 x 12 x 12 = 3456, Then you divide that number by 1728 which is 1 cubic feet in square inches. In this example that would be 2 cubic feet. JL subwoofers like normal size ports and you said they were older so I would tune them around 30 to 35 hz for rap music.
You can google Port calculator for a simple port size for your box.
Random Audio Guy sweet thanks man :D much appreciated. subbed ya.
You are mute.
Im mid 20s I Love Bass ✌