Bass Reflex design wit the new Hemp Acoustics FR8C driver

[audio_moksha]

Hello folks,

This is the first time that I am building a Bass Reflex type enclosure with the new FR8C driver. The driver has a Fs=45Hz and I was advised to use an 80 liter box with two 3"(diameter) ports with 5" to 6" length. The enclosure will be 32"L*14"B*11"W to give me about 80L enclosure volume. Do you thing this would be a good design? I think i will only use the full range driver and may later add a tweeter if I deem necessary.

Also, what is the general mathematical expression that relate enclosure dimensions to the tuning frequency? The thing is that I have to write a report for a college independent study so some general mathematical descriptions would be good. Alternately is there a good website that explains in detail the workings of a BR box w/ equations?

I want to engage myself in a systematized and disciplined study of Loudspeaker Design and I am new to all of this so any help would be appreciated. Thank you folks.

 

[Salas]

If the new ceramic version is said to have same TS parameters as the older ferrite version then use the following. Its from my tests on well run in samples.

 

[GM]

Greets!

This should keep you busy for awhile : http://www.diysubwoofers.org/

GM

 

[audio_moksha]

Thanks fellas! GM, that website is really informaive just what I needed!

 

[lousymusician]

Hello folks,
...I was advised to use an 80 liter box with two 3"(diameter) ports with 5" to 6" length. The enclosure will be 32"L*14"B*11"W to give me about 80L enclosure volume. Do you thing this would be a good design? ...

That should work. My first boxes for the first version of the FR8's were similar.