If you ever need a coupon for Parts Express I have some over on my blog: www.diysubwoofer.net

Your content is so indredibly helpful to DIY beginners. I'm binging your stuff at 2 a.m. taking notes.

Loving your video's, 3rd one in a row. Great work! WinISD is something I'm still learning myself, people like you and some others have been cool enough to break it down a little more for me. Appreciated!

For Mac Users (this may have been said already) I finally found a way to run WinISD. Wine and WinBottler are free programs that have been recommenced to run WinISD without the hassle of virtual machines, bootcamp, parallels, etc. But for me, both of those program wouldn't run properly but simply not opening, or quitting/crashing when trying to load WinISD under advance options, respectively. Nearly giving up, I found Wine-Stable (Wine-Stable 7 the most recent version, but Wine-Stable 5 is what worked for me. I could be wrong, but during install I selected both 32 bit and 64 bit as an option. After installing Wine-Stable 5, I am finally able to run WinISD on my Macbook Pro, without having to pay for a windows subscription. I hope this helps anyone with a Mac!

You provided me so much information thank you. I have a prefab tswx300a and i added an external port with pvc pipe😂 i know its a frankenstein build but i can hit lower frequency now its a new box tuned to 28hz ( yes its a long port ). I never took the time to thank you for all your amazing work and your knowledge sharing . Salute from Paris. I might start upload my bass head journey😅

I've been using winisd for quite some time. And I know all the points you said. But still I love to watch this video often 😂😂😂😂😂 ur explanation is energetic and engaging !!!! Great job !!! 👍👍👍

Really appreciate the information on this subject and more.I have learned a lot from your videos and cleared up all the noise from friends sending me in every direction except the correct one.Math doesn't lie. Thanks

Well explained. i had this sofware and deleted it now i going to re install i been searching months for info like this i learned everything in this video thanks my speaker is new on the market so i had a very hard time getting the correct box

Note on T/S parameters that I believe you have covered in another video but did not mention here; the mighty DATS! I love mine and for folks who play around with older or oddball subs the DATS is great for getting a set of T/S parameters to base your build on. Thanks for the great video!

Glad to know that you are also a Windows User like mine ❤❤❤

Interesting, I designed a 3 GHz RF cavity with tuning ports called re entrant cavities back in the 1990s. I used it for an electron positron accelerator at SLAC while I was at Stanford back in the day. I used it to smash sub atomic particles while you smash air molecules!

Using this to design a box for 2 epique 7" dvc woofers for my room right now!

Thanks for your videos! Using WINISD I learned that my particular subwoofer will play louder in all low bass frequencies in a smaller(1cu ft) sealed enclosure than in a 1.5cu ft. ported one. The TS of my sub indicated that it leans more towards a sealed sub than ported so this makes sense. The math doesn't lie as long as all the subwoofer information is properly filled in! Also I had port velocities up to 30m/s at tuning with the ported which isn't terrible but definitely not optimal. I just wish I could share my graphs.

Awesomely informational. Thank you for all the great videos.

It can def be a challenge. I had the older version on my other laptop. Downloaded this version n I believe it to be a little less complicated than the older version

I appreciate all the content you put out for us. (yes I know this was put up long ago) You make inputting the Thiele Small parameters look so easy. I'm not sure if I'm doing something wrong or if I don't have all the necessary info. After several attempts I'm still getting the dreaded red bar when trying to load the sub. Looks like its back to old school paper and pencil work for me.

You’re amazing! Enjoyable to watch and very helpful!

Very useful video for the new version. Thank you.

Your subsonic filter can greatly reduce air velocity which allows the use of a smaller port. I set my subsonic filter at the subs f3, but some also recommend setting at 2-3Hz below tuning, or one half octave below tuning.

I'm so glad I found your channel. How did I not know about it sooner? Lots of technical stuff which I love. One question I have or would like to see a demonstration of is dampening or dampening factor. How ohm load effects it and spl/SQ and such.

Been looking for this video 📹 thank you 😊

Hahaha... Im literally struggling with this since 2 days now, and here is Your video. :D

I dig your channel, I'm glad I subbed. Have you ever made a video on how to build a box with bass radiators ?

You make great informative videos

Hello @DIYAudiGuy, start off by saying I love and enjoy your videos! I have learned a lot by watching you and has taken my box designing to the next level. Made me feel so comfortable, I started taking on building for people. Question, I have a guy that has Nemesis Audio na12e v.3 subs, and I cannot find all parameters to get a green flag from WINISD. Is there a video on this, or a way around it? Any help would be much appreciated.

Love your channel

Thanks for the video!

hello good night, great video. I would like to know if the calculation that winisd makes of the box, if the space that the speaker and the duct occupies is already included. Thanks

Thanks DIY guy.

Aaaand, you've got a new subscriber.

Winisd is great WHEN you can get the parameters correct in the correct order! That is always the frustrating part for me.Or when all the data is entered and winisd says it's wrong.But when it works, it is awesome!!

Love your videos! So easy to digest the information. Do you still help Patreon members with box designs? Looking for a second opinion on a design I received. Thanks!

Looks like a cool program! Never tried it but I'm gonna have to get a computer so I can use something like this for designing speakers! (Only internet access I have rn is my phone which I'm writing this comment on.)

LoudSpeakerDatabase is also a fantastic source for T/S Parameters (as it already has pre-populated files!), but it's user contributed so there's a bit of lag between new drivers and files being available.

Hello! Query, the liters of the box that the software indicates in Item "BOX" are net internal liters or do we have to discount reinforcements, displacements of the sub, port, etc? Greetings! Thank you very much for the video

Does the winisd box volume for a vented box include the port displacement?

Hi, does winisd compute the port wolume with the box/chamber volume you input or do we have to offset the port volume from the actual box, thus adding more volume to the box to compensate?

thank you, please I have a 30w, 8ohm speaker. that's the only 2 data I read on the emant. how I can calculate the air of my box (speaker) to be made using winISD?

If you would, could you make a video explaining the differences between the older versions of winisd vs the new one (one youre using). I have only ever run an older version (0.44) and it is a completely different than the new one you just showed. Part of the reason being that the new one's auto fill for the T/S parameters screws up sometimes. Manufacturer will have one spec one way and winisd will say its wrong. Other than that I didnt know the new version has an excursion chart which I desperately wanted after using Hornresp (also another program you should touch on).

good day . I am writing you from turkey. What do you think the bandpass box dimensions for alpine swr12d4 should be? Thank you from now

great video .......i was looking at the crescendo forte 15 or 18 inch subwoofer....could these be tuned to 20 or 25 hz ...?..i would like to use them in hometheater.....thanks

when putting in the box size do i put in the gross internal volume or the internal volume after port, bracing and speaker displacement

Hello im struggeling to get the right slot port dimentions for my beyma 12LX60V2 do you have any suggestions to calculate this(not winISD)... Thanks...

I have a quick question I'm hoping you can help with. When adjusting my port size as a sphere, it won't let me adjust the length, just the diameter. The length is in gray and won't let me click it. If I change to a vent, I can adjust both sizes with no issue. Any ideas would be much appreciated.

Plz make video on curve dual bass .how set the angle of speaker.wich things we have to notice for this

When you are looking at the different volumes/tuning frequencies, how are you making that adjustment without typing a number into the boxes? Are you doing a mouse scroll or using arrow keys? Starting around 7:19

I tried to follow along with an Alpine SWS-12D2 but the volume never gets auto populated and no response graph shows up. :( I am sure it is because I can't find all the fields required. Ah, if I edit the driver in the project and set Vas it graphs for me, not sure why it doesn;t bring the Vas from the driver I created. This seems much more difficult to use than bassbox pro granted I have never used bassbox pro for much so IDK if they are similar in functionaliity.

dear audioguy, can u do a correlation video regarding vented boxes: correlation between transmissionline;bassreflex;horn cuz port length does in fact matter due to the resonace fq but in a non linear but expo port aka horn how do i calculate that eg. big W bin is combo port with horn

I designed a box to 25Hz but to get the port noise down I selected the option to use 2 ports. Winisd says the ports need to be 69cm long, does this mean I need 2x 69cm long ports or is it 2x35cm ports? The length of the port doesnt change in Winisd based on the number of ports used so I dont know if I need the total length of all the ports combined to be what Winisd recommends or if they all need to be the full 69cm length.

Hey I've got a question about winisd. I've been designing and comparing boxes for my next trunk build and I'm a bit confused. Does/can winisd account for port placement? There's a big difference in port+subs facing forwards compared to only one or the other facing forwards when squeezing two 15s into a trunk. As I understand it the air pressure/sound wave coming from your port will synchronize or become in phase with the pressure/wave coming from the front of your driver and give you a bass boost. Is there a way to know or graph when these waves become In and out of phase? Does this effect still take place when your port is not facing the same direction as your subs, would it change the frequency at which the waves become in phase?

Have any suggestions for a port tuning for rock/metal? Or think sealed might be the best way to go?

Are their any books on speaker building that you can recommend.

Great work. Out of curiosity how much do you charge to design boxes please

I have a pair of old school stroker 18ds. It turns red when I load the t/s parameters.I am not sure what I need to do to continue. Thanks for your help

Does the folded port (that you have shown 10:15) have so-called "organ pipe" resonance? And what determines a frequency of such resonance, entire length of the port or lengths of it's sections?

What’s the difference between the rear and front air velocity? Also what’s the x max for the audiopipe bdc4-12? It’s listed @17mm but also says 50mm pk pk. I entered 17mm in winisd.

Is the rear port the same as a front port? Because for me the winisd Works only for the rear but i want a front or from the Side. So can i use the same measurements?

Is woofer displacement and port displacement also included when determining box size ?

since 2003.. exelent small software, recommended.

my driver has CMS 15.4 × 10^-5 m/n what should I type in winisd for this 15.4 or 0.000154 for m/N?

Does it matter where we put the vent on the box? That is, a foot above the bottom in the middle of the back panel? A few inches from the bottom? Thanks. Great videos.

Thank you

So is System input power under the Signal tab gonna be the peak or RMS of our amp?

So, Im thinking of building a small Cube Box for a 6 1/2" Woofer with two matching Passive Radiators. Does WinISD have a calc for this or is there some kind of work around?

So you even go below resonance frequency to tune box low? Is that efficient?

Question: would the direction of the woofer make a big difference in a design such as the one seen at the end?

WinISD accepted Hifonics Zeus ZXS-15D2 Xmax 26mm peak, but not 14mm linear Xmax. When i did use xlim 26mm and xmax 14 then the integrity check was all good. Its like math classes i hated :D

The box volume in winisd tells the net internal volume (gross volume minus the woofer displacement, port displacement and any space occupied by bracing) or does it tell the gross volume ?

Hello for me my driver failed the integrety test, but also all the drivers that are already loaded in the program, what can i do? I have a Beyma 12LX60V2 driver...

does winisd pro calculate in the port and driver displacement when showing the graph line? say i want a box at 2.8 after displacement. do i add in the displacement when i put in the box size in winisd. or just the end volume?

Hi @DIY Audio Guy Please can you assist me, I'm trying plug in a earthquake dbxi 15d 4 ohm sub into winisd but the manual I got don't have enough information especially for the electro-mechanical parameters and I keep hitting red . Any tips that could help me please. Much appreciated 🙏.

I have drivers from Parts Express and Madisound. Both sites have volume suggestions and the F3 for sealed and ported boxes. Is this good or I should see what winisd comes up with? You say "play around till you get what you like for music you listen to". A video explaining the green line in relation to sound would be awesome!

Can you still use Win isd with only the thiele/small parameters details. Because my subwoofer specs don’t even show any details for anything below that section, not even xmax? (Zeroflex EVO-12)

you are the best!!!!!!!!

After my $3000 JL e-110 failed, I`m looking at alternatives, I still have a good driver and enclosure, this may be one way I can fix the lack of bass in my system.

I tried working with this application. Everything went fine with plugging in the parameters. But then when I opened the project and went to modify the volume of the box, I got an error “invalid floating point operation. Press ok to continue and risk data corruption or cancel.” I clicked ok either way but the graph disappears and I can’t do nothing else on the application. I already tried updating my drivers, but to no avail. I’m running windows 11 pro i7… is there some special processor I need or???

Do i need a high pass at ~25 hz before my subwoofer? Is it ok if my amplifier simply has a Infrafilter included and then those frequency wont even come to the subwoofer? Also does it make sense to filter those frequencies before they come into the amplifier in the first place? At the moment my diy subwoofer doesnt have that filter but my amp does, im wondering if i should be worried.

Hey DIY Audio Guy, I need help! A buddy of mine works at Kipsch and he gave me a beefy 15" prototype. He didn't have the parameters on hand, but I have the DATs v3 so I wasn't that concerned. I entered everything in WinISD, no issues, but is there an ideal frequency that you tune a home theater box to? WinISD popped out a tuning frequency of 18 hrtz in a box size of 5.3 cbft. That seems awfully low to tune a box to. I've done this with a few other subs, but they were each tuned to 24 and 25 hrtz, but most videos I've watched on port tuning, and WinISD, most people seem to be setting their frequency in the 30's. I was wondering if you had any advice on what you would tune a 15" to. I understand it depends on the bass curve and all that, but you surely have an opinion on what you'd tune your home theater subwoofers to. Ok, don't hold back, hit me with both barrels,...lol.

T/S parameters for WinISD on SDR-18 D2? Several tries failed. So did CT Sounds Tropo-18

Useful for higher end subwoofers as the lower end manufacturers dont give you any soec details such as this.

why is there no option for a series tuned quasi 6th! man ive been trying to find a program to model this box for days now

I was having terrible time passing the integrity check. Another video indicated there is certain order Winisd likes the TS parameters input. DD or SD, RE, QES, QMS, VAS, FS, XMax. I followed that, taking note which system of measurement the data was in, vs which system was default in Winisd. TA DA! Now it's green. Now

I use the .44 version it doesn’t argue parameters

Hello a question: regardless of the option to complete the data, manually or from the win ISD database, I have the message in red that informs me that they are not entered correctly. What is the cause? thank you Romania

When you say flare the port end, do you mean just simply rounding off the port ends with sandpaper or router bit, or are you talking about using aero ports?

Qts and Fs has een close relation, do you want higher Qts, Fs get,s higher and vica versa, so choosing wise for low bass is needed, I have visatons wsp26s these has fs 19 hz and Qts of 0.38 very nice for bass.

Is my box too big ? I have a jbl s2-1224 on a 3.5 cubic feet box ported box The recommended size is 2.5 I barely feel any air coming out from the port The vent diameter is 13 x2 inch My port is 31inch long My port air velocity is good too Is the port too small ? The port is tuned at 25hz by the way and 23hz at -3db I feel like the port isn't doing much even when i play below tuning frequency with a bit of power My sub also makes a engine like noise whenever there is excursion which is weird because at 25hz thats where im supposed to have the least of excursions According to the graph there is overexcursion only as from 20hz which i never play

How do i decide the box tuning freq. I want a sub going low and not lossing those dbs. My sub has a fs of 35hz. So how do i decide how much to go low in box tuning. What parameters should i look for in win isd ?

Hi ... Please make a video on adding room gain and parametric EQ filters in winisd. Both for sealed and ported simulations. And even after adding filters cone excurtion should be in limits.

Is the box size gross or net?

What could be the problem with the failed integrity check? I have entered all the ts parameters but it still fails! Awesome video as always!

Please HELP anyone! I've built myself a sealed subwoofer that has an internal volume of 20 liters (2.5 cm thick, 32 cm wide, 30cm tall and 36 cm length, all external measurements). I've used the Ground Zero GZIW 200 driver (8") , and for this driver the manufacturer actually recommends a 17 liter vented enclosure with 1 single port ( 7cm , 2.76" wide, 24cm, 9.45" long). It being sealed sounds great, especially since it's in use in a quite small room, thucked under my desk , but i'm curious about converting this box to a ported one and thus increase the output. I've been playing in WinISD, tried to figure out what tune frequency i'd want (listening mostly to music) so i "decided" on a 30 hz, but i don't get it based on that ISD reports back, just what specs should this port have. I chose a round shaped port which i'm going to 3d print, but for a 10.2 cm port (which i'd find right considering the size of the box), it said 128.36 cm long, that's 3 times the length of the actual box. Also, 1st port resonance is 133, 88, is that good, bad, unknown? Could i also make multiple ports in order to cut down on the required length? What do i do? Thanks, i love subwoofers and audio generally speaking, and i'm also into DIY wherever i can, but getting the basics here doesn't seem that straight forward unfortunately.. :(

I know you can change the port area to change the port velocity, but for spl purposes does winsisd calculate the db when you change the port size? Will the box get louder with more velocity or will it restrict output, how do you know what the port area should be for max spl? If you make the port bigger will it get louder? If so, how big is too big? And vise versa for a smaller port.

I’m new to the winisd, watched your video and went trough the sssteps needed to create the profile and box design . Now how do I get that to paper. I’m a construction worker so I know how to build the box itself but how do I apply the program to paper ? Please help .

I have a critical mass UL 12 I want to build a ported box for but I can't even find half of the parameters needed. Would it still be possible to use WINISD to make a box for it?

I have another possibly silly question. If the auto fill parameter in blue is drastically different than what the manufacturer posts, do you change it or leave it with the auto filled calculation?

I've never used WINISD before but it looks great. I use BBP6 but it feels limited most of the time. Instead of all those folds why not run the port up the back wall?

I can't get this to work on my phone. I don't have a pc. Do you know of one that works on my phone? Or if I pay you would you be able to help me design a new box for my system? I have real good equipment and have built 2 boxes but I cant get them to sound good at all and at the price of wood right now I can't keep experimenting. If not I understand. Thanks

Please yes video on ts

On the project information page when I enter a project name. I get a prompt box on the screen division by zero