Dayton 18" HO Ported Build Thread

[1Randy]

Yes, the T/S parameters define a driver precisely, very precisely in fact, in terms of box tuning design. There are many autocad type programs for modelling a speaker, that greatly speed up the design and do it accurately. There are also programs to assist with crossover design.

One would need more information than that to begin a design process. Price, one or two, associated equipment etc. A sub needs to be thought of in terms of total system design, but I admit it often is not, and that can, and often does, compromise results.

I likely have some designs on file that might fit your description. I am off to Mayo for testing

Have a great day

 

[lovinthehd]

@1Randy have you tried modelling your own sub with appropriate software? Something like BassBoxPro or WinISD?

 

[1Randy]

@1Randy have you tried modelling your own sub with appropriate software? Something like BassBoxPro or WinISD?

No I have not , not really good with computers to be honest ..But I do love building.
I've seen youtubers model subwoofers with these softwares,... changing port size/length,.. enclosure size,.. and you can see the different F.R.
TLS Guy Mentioned to me changing box size rand tuning to get more extension,can come at the cost of Quality. I would not know how to get "Optimum" enclosure design

....

 

[TLS Guy]

No I have not , not really good with computers to be honest ..But I do love building.
I've seen youtubers model subwoofers with these softwares,... changing port size/length,.. enclosure size,.. and you can see the different F.R.
TLS Guy Mentioned to me changing box size rand tuning to get more extension,can come at the cost of Quality. I would not know how to get "Optimum" enclosure design

....

What is your budget and upper size limit? I have quite a few worked designs on file, so I might be able to solve this for you quite quickly.

 

[1Randy]

What is your budget and upper size limit? I have quite a few worked designs on file, so I might be able to solve this for you quite quickly.

No bigger than this pic....Driver alone up to $750

750

 

[TLS Guy]

No bigger than this pic....Driver alone up to $750 View attachment 77694750

That is not the way you design a speaker. I can get it roughly the same size. A cube is a bad idea as all the internal reflections combine to make a peak, so I will avoid that. I will try and get about the same volume. You never design backwards with a cabinet, and find a driver to use. ALWAYS the other way round.

 

[Verdinut]

That is not the way you design a speaker. I can get it roughly the same size. A cube is a bad idea as all the internal reflections combine to make a peak, so I will avoid that. I will try and get about the same volume. You never design backwards with a cabinet, and find a driver to use. ALWAYS the other way round.

At some subwoofer frequencies, a cubic enclosure cannot become problematic. Wave lengths in enclosure sizes are involved with frequencies which are a lot higher than those reproduced by a subwoofer. As an example, a 30 Hz note has a wave length of 114.33 meters.

 

[highfigh]

For a home theater subwoofer is the first step determining your box size limit ?

The parameters need to be used in a good box design program- the size will be determined by this. Parts Express has modeled a lot of drivers and if you click on Manuals and Resources for any drivers you're considering, you'll see info that includes examples of designs with various response specs.