To get the best performance out of a subwoofer you DEFINITELY want to understand what these volume definitions mean! THANK YOU GUYS FOR WATCHING! ➜ Subwoofer Box Designs - www.caraudiofabrication.com/box-designs ➜ CAF Shirts & Hoodies: teespring.com/stores/caraudiofabrication ➜ Tools I recommend: www.caraudiofabrication.com/materials-tools

@marioaguirre175

5 жыл бұрын

CarAudioFabrication could you shed some light on how to build a vented enclosure with two woofers that share the same airspace and vent?

@marioaguirre175

5 жыл бұрын

More specifically how adding another woofer effects vent dimensions and increasing internal volume.

@jar145022

5 жыл бұрын

What about when you don’t want a box. I have a factory sup I would like to update but not sure how to handle the issue

@JasonK-xg8gc

5 жыл бұрын

How do we talk about, you making me a box? I have a skar audio, 12d2 dual 1 ohm speaker!? 2018 nissan sentra!!

@josephdinger27

4 жыл бұрын

I utilize 2 old boxes I had and made a kicker vr2 slam my eyes blurry lol.I first took a old Sony singel12 ported box redid the port by making it a longer tube then took a Sony double 12 box set the smaller box and 12 inside the larger box mounting the sub and small box up to original 12 hole on the double I sealed the second hole and it was a completely sealed unit wow and I did a inverted cool model also but I'd have to step by step explain lol

One of the best instructional vids you've done in ages Mark. Thanks

@CarAudioFabrication

5 жыл бұрын

Thanks Tomm, and thanks for being a part of the Patreon membership team!

@riveralley

5 жыл бұрын

@@CarAudioFabrication I know you know but the gross volume is best for how much space it takes up in the trunk.

I purchased a custom design from Mark at CAF for a JL 8W7AE. I was surprised by how responsive he and or his team was. They worked with me based on how I would be using the sub, the car it was going in, firing position, and most importantly the type of music I listen to to come up with the correct tuning. I’ve built enclosures in the past but they were not very sophisticated and were in fact exactly how Mark explains them here. Based on the “required” specs. The designs I received from CAF were very detailed but easy to understand. I will say though that you could build an enclosure with simple tools. Jig and circular saws come to mind. But there really is a difference in the finished product if you can swing the purchase of or if you have a table saw and router. Back to CAF design ... the custom enclosure sounds GREAT. And for those on the fence about an 8” sub, don’t be. In this case the JL paired with the custom enclosure by CAF, performs better than I could have imagined. Seriously!

I learned the hard way with tuned frequency vs airspace (I had only been using enclosure dimension / port size calculators, not acoustic enclosure modelling software). Turned out that the recommended airspace for each of my subs was for a 45Hz-tuned enclosure, and that double that airspace per sub is required for 30Hz. So initially with 4 subs in my enclosure I thought it was quite inefficient on the lows. Indeed, I put it into the software and the F3 was 40Hz. I replaced 2 of the 4 subs in each enclosure with blanking plates and now I have an F3 of 27Hz and it drops proper low!!! Of course, there is now also double the port area per sub with half the amount of subs in each box, so there is no longer any port noise either :)

Thanks for the information. I've never had a paycheck to understand the difference between gross and net

I been wanting to get into building subs for people for there cars this vid helped me learn just subscribed

I suggest if you use the term "total" volume you might be less grossed out :-)

Amen!!!! This is exactly what i try and tell folks.

I’m starting a wall build.. Volvo station wagon what do you suggest for picking speaker size box volume speaker count?

great vid! .. learning is fun!!

im really wanting to run ct 2 sounds Meso 10" D1s in a 6th order. but im not sure how to design the box to fit in the truck of my audi a6. anyoone have any advice?

Just let Mark design your box for you so you can be stress free.

@NTZClaw

3 жыл бұрын

That's part of the fun. If I was going that route I may as well purchase from a local audio shop.

@briangullickson9013

3 жыл бұрын

☝🏼 Precisely

@rockfordhx2768

2 жыл бұрын

If THAT AINT THE TRUTH PRAISE GOD!!!!! For mark!!!!!

You got a lot of knowledge about subwoofer and clear explanations. thank you so very much, I'm looking forward to your next videos. 1 like and subscribe for you, you deserve it!

Mark, can you do a video or two on using WinISD Pro? I've modeled my sub in WinISD Pro according to other tutorials. However, what lacks in other videos is analyzing the different responses to different volumes. How do I decide which volume to choose?

@jtmcfarland3512

Жыл бұрын

Check out the videos from DIY Audio Guy for a brief synopsis in his designs ported boxes playlist. That should help until Mark covers it.

It was good to point out that the volumes are recommended starting points. I built a dual ported 15" box where the port volume and area were correct, but the actual passage for the air was so narrow and wide that the ports didn't flow well at all. Inefficient ports made the box somewhere in between ported and sealed and the internal air volume all wrong.

if I have a 1 18 that specs are 5.25 cubic feet and 78in port area but I want low bass so I wanna tune the box to 29 hz how big should I make the box and do I still use 78in port area or is there a recommended square inch per cubic foot

Question I want to try to fit a 15 under my truck seat if the height can fit, can I just build box wider to get the airflow needed to hit lows

Good stuff right here!! Good job !

Thank you Mark for Ur hard work in the making of these vids. ✌️out from Modesto,CA👈😎🤪💯👊👍

@CarAudioFabrication

5 жыл бұрын

Thanks for always commenting! I always recognize people that comment often!

@gettinthrewlife76

5 жыл бұрын

@@CarAudioFabrication thank you 👈😎👉💯👊👍

👌

@BrianW2979

4 жыл бұрын

This video is why your boxes sound so good isn’t it Doug

Would you happen to have a design recommendation for two 12 sa sundown for a 13 f150 single cab. Enclosure behind the seat

Dear, congrats about yours projects!! Very nice!!! Please, question to you.....do you have a 12" subwoofer project to home theater?

Dude! You’re the man!

Internal Air Volume is the Vb on the the12volt website port length calculator? Plz advise..

Have you ev er put a box in a hybrid and if so what specs am I looking at?

I love your channel keep up the great work ! I didn’t know you make and design custom boxes. I’d really like to have one made for my ZR-1 I’ll be sending an email !! 🙌🏼👍🏼👍🏼

I want to make a phone speker. Do you know if this video can help me with that? Thank you!

good morning mark I have a convertible car but when I remove the awning the subwoofer is not heard as I have to make the drawer so that it sounds without awning my subwoofer are two MMATS OF 15 '

I have a Sony xplod CDX-GT290 it powers on but doesn't take command. It does allow me to turn up/down volume or change source to CD ,aux etc. What could be at fault (it doesn't have a reset problem). Thanks.

How do you know what size the port should be if the spec sheet doesn’t list it? I hear people say tuned to whatever,how do you know? I’m using sundown audio as 15’s

hey how are you doing ? I have wanted to upgrade my stock audio in my 2000 silverado for some time .. but when it comes to the subwoofer .. im confused between two types .. sealed box enclosure or a bass tube .. whats the difference in bass quality? thanks!

@mikecheeze4312

5 жыл бұрын

Fucking look it up guy. Why ask on here and wait for a reply when you could have already had the answer. Jesus

if i have 18 "speaker .. how to calculate box volume and port volume ... according to the data available on the speaker ... and i want to use it for outdoor..thanks

that looks like the plans for the 12 inch ported box on your site I built that box and installed a punch p3d4 12 in it and it hits hard .

There could never be enough of these types of helpful videos. Some think get this brand that brand don’t get this brand that brand of equipment that maybe true in some cases but it always comes down the the nitty gritty details. As for me I like Brazilian amps XSpower power batts dual or more runs of power and ground I use U.S Alternators and custom made subs and I build my own boxes. But it’s lots of learning and trial and error no one is perfect. My goal now going to use custom made subs on Solo X 18 motors is a true 28-19hz tune using every square foot of trunk space to where it’s going to be a blow thru but not a band pass almost a 6th order I guess using my trunk as an enclosure with the port facing my cab. 97 Gmarquis the trunk is 19 cubic feet only 15-16 of it is feasible to take over with an enclosure Then minus all the stuff we learned here leaves me with about 13 cubes for the box and 3-4 cubs for port-ruff estimate of course. Going Burch to try to save weight freakn 100 pound motors and there going to be two :)

@jtmcfarland3512

Жыл бұрын

It sure is a rabbit hole friend.

I have a 2019 new body style RAM 1500 Laramie Crew cab I'd like to make an under-seat enclosure for. I am an amateur carpenter and could fabricate what I would need for the space easily but am clueless as to all things car audio. Would I just make as big of a long thin and flat (to fit under the seat) box as I could and then figure out volume after and get the appropriate sub speaker? Should I just have a cut out with enough clearance for the sub on top? How much room do I need between the bottom of the seat (if I do up-firing) and the face of the sub speaker? Are there any videos or instructions for starting from scratch on a build like this?

@jtmcfarland3512

Жыл бұрын

This is how it was done for years. Buy a speaker with a grille and it can contact the seat. You may look up prefab boxes for your truck to get an estimate of your final airspace.

sir do you have for dual 15" box design?

Good video also the tuning affects your sub some times someone comes in saying my sub wont go below 30hz ill always look at the usually just tuned too high to go that low!!!!

Hey y’all, Which software /Cad works best for designing unorthodox shaped boxes?

Great topic!

My subs has a VD of 65.26 so do I just subtract it..from the net volume till i get the required cu ft am looking for i have 2 Ts5512

Great video! Just liked and subscribed :). I never knew that the port volume was not considered part of the total airspace! I was about ready to shove 2 basketballs into my subwoofer box to take up the "extra" .5ft3 of airspace i thought I didn't need. My subwoofer is "clacking" when I send full volume high bass music to it at max volume. Not sure if that's distortion of bluetooth signal * head unit distortion * mechanical distortion, or simply that the sub is over-extending due to too much airspace. So I backed down the subwoofer amp gains until it no longer clacks at full volume. But now i miss the "slam".

I have a question. Lets say im building a simple L ported subwoofer box. How and where is the best place to put the woofer. In front the baffle or center of the face plate. Lets say the baffle is about half length of the face.

Key point starting @8:45. Vehicle internal airspace matters very much indeed

Hello, so i have a soundstream rubicon 15 inch subwofer, my father gave it to me, as that i dont have any volume information. Its an old one maybe around 2000' year. With this i went on search and i dint find volume info about this sub. I want to do a ported box, with a rectangular output, i will also listen mostly to house bass music, techno and rap with nice basses. So could you help me knowing the Internal Air Volume for this sub? So i then could do the right box.

G'day Marc, I am wondering why the port and it's structure was not included with the internal box volume? Cheers :-)

Thankyou very much sir🤠♥️

These videos are helping me so much on making a box for subs. How would I measure how much space my port is taking up in my box?

@jtmcfarland3512

Жыл бұрын

You would use geometry formulae. Generally pi*r^2*l for round ports and l*w*h for rectangular.

Yeah I have ran into that problem with subwoofer displacement, so I go into some of my old manuals and look up other subs that are the closest to what I’m using. I have a folder of amplifiers, subs, speakers, headunits dating back from the 90’s LoL

@jtmcfarland3512

Жыл бұрын

So many of us have. For many years even high-end manufacturers didn’t publish it. Honestly, go to your modeling software and change the box size 0.06 cuft for an 8” woofer. It’s practically negligible in the ultimate results.

If a prefab ported box has a port facing front like the subwoofer would it make any difference if the port was located in a different spot on the box? Or say round instead of rectangular? Also it's a 4 cubic ft box with 2 alpine type R 12s with Rockford power 1500bd. I get extremely good bass with rap and techno but I listen to more rock and metal and the bass just isn't there. Should I go with 2 individual sealed boxes at 1 cubic ft each 32hz?

@jtmcfarland3512

Жыл бұрын

Yes, it makes a difference. Port shape does technically also, but not much if the face area is adequate and the end(s) are flared. Sounds like a tuning issue as well.

How about if you put two subs in a box just built for one the cubic feet that is with no divider is this isobaric ? I seen some were there was a description about it would be isobaric if two subs were in a box built big enough for just one of them sealed of course

Enjoyed the rant. Ditto

I'm building a box for 2 x8 v3 sundown subs, powered by an sfb 1000d for each sub so 2 amps,what size box do u recommend?

@jtmcfarland3512

Жыл бұрын

If you don’t know how to find that out, I don’t recommend building your own box.

Thanks!

Need help building a box using 2 12 W3 in a 2019 WRX and i listen to bass boosted songs

Great Info. Most people just throw a sub into a box when their is way more to it. All speakers have a air volume they will sound the best in. Given a type of sound your after.

@jtmcfarland3512

Жыл бұрын

Not only sound best, but have proper damping. The box size effects more than sound (max power handling for example).

🤔 so how do you determine how much volume you need to size your box appropriately. I have a box for an 18 and love the sound but I want to change the design of it . I know I can just simply measure my box and stay the same size but just wondering if one was to buy a speaker and wanted to make sure you didnt make it to small or to big. Thanks.

@jtmcfarland3512

Жыл бұрын

Any reputable speaker manufacturer has size recommendations. If you’re happy with the sound, please consider just adding a “beauty panel”. I’ve met too many people who spend hundreds or sometimes thousands “upgrading” just to find the sound is only slightly different.

hey man..can u make a video how to make or build the best tube box or tube subwover?

What app do u use on your ipad

hey, can you help me, here's my `10" subwoofer T/S parameters ( there's no T/S parameters from the speaker manufacture, its a cheap subwoofer tho, i measure it my self, probably not so accurate) Fs : 28,9Hz Re : 3.6 Ohms Qms : 1.461 Qes : 0.350 Qts : 0.282 Vas :46,4071 lts can you help me for the box volume, ported or sealed, thanks :)

Hi I am Interested in you designs and would definitely be making a payment in order to get what I’m looking for but before part with my money would you be able to design me a box at 28hz from a 15” ported box that fits in the boot (trunk ) of a be polo 6n2 ?

I use fosgate stuff and they give you the ideal dimensions for a sealed enclosure. Would u follow the dimensions exactly(p1s4 10") or would u do your own? Ive built a few of my own over the years but didn't follow the factory exact box specs. Always did my own thing mainly due to wanting the sub to fit in a certain spot. Love the videos and I have learned a lot from them

@jtmcfarland3512

Жыл бұрын

For a sealed application, as long as you’re pretty close, it doesn’t make a huge difference in sound. BUT, you will need to adjust your gain based on the box size if you want to maximize performance.

I have a BIG problem when calculating a box for my use... My music preferences goes from ABBA to ZZ Top, and from classic to dubstep! And from enjoying a silent moment at 2 to turn the knob all the way to 11! The only music I don't listen to is jazz, blues and death metal.

@cassieschade7398

5 жыл бұрын

Don't quote me on this but Ive seen and heard that bandpass or some kind of 4th order box is good for a variety of music. Like I said don't hold me to it but try it out

can you please make a video on how to calculate port displacement when building a subwoofer enclosure.Thank you!

Regarding the big and small sealed enclosures. If I wanted decently low bass out of a 12, could I build a box bigger then the manual suggested, and just power it with a bigger amp then the sub needed? I know people do this with ported boxes, just curious about sealed

@jtmcfarland3512

Жыл бұрын

Bigger box = less power handling. No, you cannot do that. Sorry.

@jtmcfarland3512

Жыл бұрын

Okay…you CAN, but no matter ported or sealed, it’s pushing the woofer past it’s thermal or mechanical limits.

Thanks, top content man, subscribed!; and also please excuse this question, but I would like to understand the physics behind of ' Sound Treating' on car doors; could you kindly pointing my out in the right direction to understand why this procedure is recommended to do?, thanks a lot, have a nice day man.

@jtmcfarland3512

Жыл бұрын

Look up resonant frequency cancellation. Also, if you have volume of stereo at 10, but noisy traffic at 4, you can only hear 6. If traffic goes down to noise of 1, then you can hear 9. That’s a 50% increase in PERCEIVED volume.

Hy mark i have a question about port ratio. I am planning to build a subwoofer enclosure whit 2 skar sdr 12"D4. My program Torres gives me a ratio of 1:3.64 is this good or bad.

@CarAudioFabrication

5 жыл бұрын

You need to check and use a real program like winisd. Torres is only a tuning frequency calculator. Nothing else. It tells you nothing about the performance of the port or the predicted response. It literally only tells you a tuning frequency. With WinISD you can get an actual idea how the port will perform and if the vent mach speed is within an acceptable range.

@darklord666lom

5 жыл бұрын

@@CarAudioFabrication Thanks for the reply. I have winsd on my computer. But I havend used it that mutch so it's a bunch of abracadabra for me if you have some pointers for me I would be glad to have them. Or maybe I Wil order a design from you but whit te skar's. At this point I am still orienteding. Thanks for te info. Ps like your vids and teturiols

Good afternoon, friend ... I would like a project for a 12 "Rockford Fosgate R2 Subwoofer, 250 rms ... Would you have any project? Hugs !!!

Funny you mention some manufacturers don't include subwoofer displacement ( for both sides ) in their specs . I have a set of FOCAL flax P25FE 12" subwoofer that only says volume and f3 in the spec sheet for sealed enclosure . They say .72 ft3 and f3=48hz for instance. I have assumed that they are talking about .72ft3 AIR VOLUME . Is this correct ? I know from your other videos you use focal speakers in your builds .

So if manufacturer says recomended sealed volyme net 19 litres , do I still need to add volyme that the sub is taking?

@jtmcfarland3512

Жыл бұрын

Yes

What do you get when you order a subwoofer box design from this guy? Do you get templates or do you just get simple measurements??

@CarAudioFabrication

5 жыл бұрын

Box Design includes dimensions for each and every part of the box. The design is fully customized to your vehicles specs, dimensions, your exact subwoofer, and your musical preferences. Basically it's a design made exactly for your application to get the best performance and results.

How much can you deviate from the recommended internal volume before it would be too much for the woofer to handle?

@jtmcfarland3512

Жыл бұрын

It depends on the woofer, but in most cases even a 10% deviation will have little effect. What’s more important is checking the results of your assembled box before calculating actual desired port length. Look up Focal subs spec sheet and it can show the response graphs and corresponding box sizes to give you a better idea.

As always, very nice and informative video! It'd be awesome if you could make one video about having two subwoofers in one single box, do they have to share the same box or it's better to separate them? Thank you very much!

@CarAudioFabrication

5 жыл бұрын

IMO its better to keep them together and working together. People will say "but what if you blow one subwoofer?!?!?" Tune your amplifier correctly and use a good box design and this isn't an issue to worry about. I can't remember the last time I have damaged a sub.

@jordan010203

5 жыл бұрын

CarAudioFabrication Mark, thanks for the advice! I have two subs in one box and I was hesitant about having them working together, they both are in parallel at 2ohms, I always watch your videos, very informative! Thanks again! Greetings from Peru!

@michaelstraughn3465

Жыл бұрын

@@jordan010203 Use both in a push-pull setup, makes the volume of the enclosure 1/2.

@jtmcfarland3512

Жыл бұрын

I prefer them in separate chambers. Blowing a speaker isn’t always about proper design and setting. Sometimes it’s a QC issue and others it’s a material lifespan issue like how old rubber gets brittle. Finally, if you have a high-end setup, it also allows independent time alignment and tuning.

Hi, i like your video. I have a question for you. I bougt 15 in kruger&matz KM380T11 speaker. I don't know what vlolume box need for this speaker. Here is many diferent parameters i cant understand. Size: 15 " Maximum power: 1000 W Frequency response: 25 ~ 1 500 Hz Sensitivity: 89 dB Impedance 2x 4 Ohm Magnet: 100 oz Coil: 65 mm T / S parameters Revc: 3.4 Ohm Fo: 29.025 Hz Sd: 70.686 cm Md: 200,410g BL: 9.803 Tm Qms: 5.798 Qes: 1.328 Qts: 1.081 No: 0.184% SPLo: 84.7 dB Vas: 103.609m M Cms: 146.030u M / N Krm: 5,036 mOhm Erm: 0.843 Mms: 205.893g Mmd: 195.087m Kg Kxm: 24,497mH Exm: 0.649 Thanks you very much if you can help Me.

Hai,huge fan of yours..I got this prob with my 4chnnel amp,whenever i put the ignition 'on' a loud static noise came through the speaker at the startup and the whining noise also..can you help me suggest what should I diagnose to solve this problem? Btw,the 4channel amp runs through front door speakers n a sub

@augisaugasis

5 жыл бұрын

Is your amp power cable and your rca cables running on the same side of the car? Are they touching? I had the same problem so i seperated the power and the rca cables to different sides of the car and that solved the issue.

@Elbert_knightwish

5 жыл бұрын

I ran the power cable under the carpet and the rca on the other side,I've check it few times before but no wires actually touching each other..that loud static noise is really annoying when I put the ignition on

@shanevanheerden6676

5 жыл бұрын

Mine did the same...also running RCA's on other side of car along with remote wire....and then my Power cables running down the opposite side... believe it or not...it could probably be the head unit itself....try grounding the RCA's behind the radio....if that doesn't work then you'll have to get a better head unit... like I did...and it was problem solved after that

@Elbert_knightwish

5 жыл бұрын

shane van Heerden already done that before but didn't solved the problem..I think I need a new head unit tho

What about any displacement caused by damping materials such as rockwool insulation or poly fill?

Lemme ask ya... Ever test the Woofer, for Qts, Vas, Fs? you do that, and using MATH, you can determine whether its best for a Vented or Sealed Enclosure, furthermore the length of Vent, the Tuned Frequency of the Enclosure. Without using the Manufactured spects.. which by the way can be up to 30% out of tolerance. Thiele and Small parameters...

@jtmcfarland3512

Жыл бұрын

That’s certainly the best way, but requires more time, expertise, and equipment. Please expose any companies with 30% out of spec performance in your own videos. I think it’s important for this industry to get in check. It’s full of manipulative parking lot van sales who’ve grown into warehouses. We need to crush the crud so there’s room for the quality brands to shine. If they had larger market shares, maybe we could all finally afford them.

Say theres a recommended internal air volume from the manufacturer 2 .20-.70, what the characteristics and trade offs when you go smaller/larger? You almost got into that topic.

@andyn333

4 жыл бұрын

Smaller would hit harder and larger would be lower bass.

Is it better to have 2 12” subs in a 3.8 cubic ft ported box or 1 12” in a 3 cubic ft box? Mainly low bad but also somewhat punchy .I was always taught that more come area is better but what do you think? Thanks love the videos!

@jtmcfarland3512

Жыл бұрын

Completely depends on the speakers used. Cone area is an area and your question is about volume.

Since the Jeep build, I have been really confused on where to start. I have my vehicle and have a bare basic idea of where I want my subs and know that I want to have a ported box and brand I want to use but I don’t want to build the box without knowing what my speaker/subs measurements are but I don’t want to waste money buying a speaker w/sub setup only to find out the air volume will not be enough for the vehicle space I’m trying to utilize. By the recent uploads, I get the notion that I should build my box last. Am I wrong?

@CarAudioFabrication

5 жыл бұрын

You should have a plan, a design. Think about building a house, you wouldn't just start buying a ton of wood and materials and start digging and building without having a plan, you need a design or plan to work from. Its honestly crazy to me how many folks just buy their subs before they even take measurements in their vehicle. Here's another helpful video to help you determine if you even have enough airspace for what you are planning: kzread.info/dash/bejne/oX-Yo6qTg5SygJc.html

@emory7467

5 жыл бұрын

most subs of the same size usually require similar box sizes. at least in the limited amount of research ive done, so you could build your box and get the subs later. or you could build a box that fits in your car then figure out the air volume and buy subs according to that. both ways work but if it were me and i was concerned with the space in my trunk the box was going to take up id build my box first then get subs to fit

@michaelperez9290

5 жыл бұрын

If you dont have alot of room dont get subs that need alot of internal volume.

@kid_rajah

5 жыл бұрын

Mark, lol yeah I guess I should have stated that I already have the measurements for the car but between starting the box or buying the subwoofers. Okay, the dilemma is if I start the box for two 10” Subs with an overall size of L 4.6’x H 1.7’x D 1.2’ then the air volume might not be suitable for two 10” subs and would render the box useless. If I buy the subs, then the air volume (my understanding) would be the most important number to sound great and keep the subwoofers playing at peak performance for longevity. However this may change the whole design of my box plans as well to a point that I may have too little or too much air volume for the peak performance range of the subwoofers. Sure I can build a box and have a very good sounding system until I close the trunk and it sounds like a kid pressing his lips together trying to make bass sounds. Like an 87’ Cadillac with a beast system and no sound deadening treatment. 🤢

@mikecheeze4312

5 жыл бұрын

@@kid_rajah jesus christ man really??!! DO SOME FUCKING RESEARCH!! Nobody wants to read you long ass post about you not knowing shit about shit and not knowing what you want and try to figure out what you want. Either pay out the ass and have it done or DO YOUR RESEARCH and do it yourself.... fuck!!! Hey mark I'm gonna gonna post something about not knowing shit about what I want and will you spend your precious time and tell everything about everything please🤣🤣🤣🤣🤣🖕🖕🖕🖕🖕🖕🖕🖕

How does the manufacture determine the recommended volumes? I would guess there has to be an actual formula or metric utilizing the drivers T/S parameters that gives you an ideal range? I can't imagine that those volumes are determined by engineers via the guess work of trial and error. ???

I got me Skar ZVX v2 12 recommended is ported 3.0 tune to 34 hz my box is ported 2.0 tune to 32hz will it's hurt the subwoofer.

@Catholic1391

4 жыл бұрын

I actually have two Skar ZVX v2 12, so I need a total of 6.0 cu feet. Only problem is I don't know if I could fit that in my 2006 Nissan Altima. My box was total 4.0 for two Skar EVL. Am going to put those Skar ZVX v2 12 in them hope everything is ok🤔

How do you subtract internal bracing?

@jtmcfarland3512

Жыл бұрын

Geometry

So if I can get a box with .95 airspace but my choice of subs is a 10" that recommends .6 and a 12" that recommends 1.375. What would be better?

@VeritasEtAequitas

4 жыл бұрын

The 12 if you MUST use that box without modifying it. In too large an airspace, a speaker reaches xmax too easily. You could also cut the box and make it smaller for the 10"

@jtmcfarland3512

Жыл бұрын

The 12 would be a better choice, as long as you have an overpowered amp and the sub has higher thermal than mechanical limits.

But if you don’t get that information when you by a subwoofer? How are you doing then?

Do you guys sell blueprints for boxes?

@CarAudioFabrication

4 жыл бұрын

Yes. www.caraudiofabrication.com/box-designs

Video idea: will a modern DSP (like the newer AudioControl units) allow you to compensate for a less-than-ideal box size? It'd be cool to see you build sealed three boxes for one sub: on box too small, one exactly what the manufacturer recommends, and one too large, then see if you can use DSP to make them all produce the same response on an RTA. I've wondered for a while if we could "cheat" like this with DSP to let us use a smaller-than-ideal box in vehicles where space is tight.

@jtmcfarland3512

Жыл бұрын

It depends how you define “compensate”. It’s also not a yes or no answer. There are some issues that can be addressed with a DSP, but others that are essentially set in stone.

@JesseOsby

Жыл бұрын

@@jtmcfarland3512 By compensate I basically meant have the mis-sized box sound identical to the correct-sized box. I.e. the same frequency response, distortion, impulse response, etc.

@jtmcfarland3512

Жыл бұрын

@@JesseOsby Unfortunately, that doesn’t quite work. Today I noticed Mark has a newer video called “You’re using DSP wrong!” Where he briefly mentions box sizes. A more detailed explanation is that a box is essentially a part of the speaker (just like the wires and magnets). The air pressure created by the moving cone is like a spring, holding the cone in a happy medium when it tries to move. If there’s too much pressure, you’ll have to overpower the system, which can cause distortion and burned up amps/DSPs. If there’s too little pressure, you can send the cone flying out of the speaker, tear the spider, crack the voice coil, not to mention have a muddier sound because the speaker is now too floppy. A DSP cannot correct for a bad box. Edit: Even a ported box. Many people think it’s open to the outside, but in fact the air still has a calculated amount of inertia. Kind of like swinging a paddle through the open air; even though there’s only air on the other side, you can feel the resistance of it hitting the paddle.

So is V-box the net or gross volume?

How do you get a speaker volume?

@halasimov1362

3 жыл бұрын

Sick it in water! :D

Is the space between the rear of the subwoofer and the box wall behind it, critical?

@Jay-uw9qr

3 жыл бұрын

No, aslong as its not flush to the box, you can have any amount of air but if there are holes on the backplate don't make the magnet fit flush to the back of the box

😊 thank you

I've had so many headaches over trying to figure out enclosure sizes for my subwoofer. The data sheet for my old JBL driver uses that same ambiguous phrasing "includes driver and port displacements" and they don't include the driver displacement. In fact you might have even got that example from a JBL datasheet if I didn't know any better. What bugs me even more is that different manufacturers provide different TS parameters, either by giving them different names than standard, or just not putting them in at all. Not ideal when WinISD is asking for values and you have to decide whether not putting them in will affect the resulting enclusure design.

@jtmcfarland3512

Жыл бұрын

Not to mention, many times those parameters weren’t obtained in the same test condition and don’t actually go together. Some manufacturer in China sent that data to the seller who uses it for their own marketing after slapping on a logo. 🎉

Can you explain how to calculate port tuning separately??..I bought a design and built it and hits nice but I want to try something different.. different tuning and stuff..I just can't figure out how to properly tune the port..WILL YOU PLEASEEEEE EXPLAIN FOR ME😐😐thanks man😎

@mikecheeze4312

5 жыл бұрын

Every sub has a different need for port width, length and type. You cant just put any port on any sub. Do your homework, read a book

if you what to measure more acurate the air volume occupied by the subwoofer, you can put in into a bag and submerge that part of it into a scaled, liquid filled bowl. :))

what is the application 🤔🤔🤔

What is the correct way to account for the subwoofer cut out?

@jtmcfarland3512

Жыл бұрын

You don’t. That’s part of the outside of the box and where the driver displacement occurs.

I’m trying to make 2 sealed box for 15” audio pipe txx bd4 I need 4 cubic feet Hope they pound going to run them on a 4K

@yusufjorgenz5951

4 жыл бұрын

You have a lot to learn young jedi

Can You please make a video about the Big 3 UPGRADE

@mikecheeze4312

5 жыл бұрын

Just go watch one.... derrrrrrrr

I have a 21 inch sub, but in the manual the only info there is, is that the fs is 30hz. From research, no one else knows the full details. Will I just take a guess?

Someone know how to determine just the Fs of only a vehicle's cabin, without being affected by the box tuning or sub's Fs? I don't wanna know what the overall tuning is, but just the vehicle's cabin.

@jtmcfarland3512

Жыл бұрын

A vehicle does not have one single Fs. Play pink noise inside and look at the signal from the microphone.

If you must know the displacement of the subwoofer you can always drop it in water and mesure how much it goes up but then of course you will have a wet sub that may or may not work any more

@CarAudioFabrication

5 жыл бұрын

Yeah... Don't do this.

@jtmcfarland3512

Жыл бұрын

ROFLMAO 😂 Alternatively, you can use a heavy gas and do the same thing. However, it sure would be easier if the manufacturer just told us on a spec sheet.