American Bass VFL-8 Box design

[AaronT]

Honestly right now while I'm waiting on building my for 8 box for my CT sounds meso 8s. I have them in a prefabricated ground shaker box it's .75 cubes at 35 Hertz and it sounds absolutely fine

[Scotnemily]

good to know thanks. I might pick on up for testing until I have time to build something

[AaronT]

It's like 100 bucks 

 

I modded it a bit, I used t-nuts and machine screws to mount subs, used Dayton audio binding posts instead of the factory posts. Used raptor 8g premium ofc for speaker wire, soldered copper lugs to connect wire from subs to binding posts inside box and used nakamichi 90° banana plugs with knukonceptz 8g from box to amp. It's 11/16 thick mdf double slot port (one on each outer side of box) common chamber.

 

It gets the job done. I'm a shitty shitty carpenter, I know to guys fairly decent with woodshop skills they can cook up a great box in a matter of an hour, but that's not my forte'.

 

 

 

[Scotnemily]

Nice! I was looking over them. I was hoping to find one for 4 subs vs buying 2 dual sub boxes. I could just test 2 but kind of defeats the purpose of getting 4 to try. I am thinking about just slapping together a quick sealed enclosure. I know it won’t give quite the same out put as a ported but it would be fast and cheap to build. Likewise I could just throw a 6” PCs port in it. I have 6’ or more laying around still.

[Scotnemily]

I have also wanted to do a box with a passive radiator. That would be handy to keep box size down. Would 2 of those 10” earthquake adjustable ones work? 

https://www.amazon.com/dp/B00K1GV8QI/ref=cm_sw_r_sms_c_api_i_NN4qEbB26SKN3

[AaronT]

I know nothing about passive radiators all's I know is if the box volume is enough you can throw a fort in their report actually displaces a lot of volume

[AaronT]

If you had 3 cubic foot of total air space after displacement of the subwoofer

 

And you used a 3 inch round port you need to port to be 2.98" long to get 35 Hertz

[Scotnemily]

3” seems kind of small to me. I think I ran a calculation last night before I fell asleep. If I have a 2.8 ft^3 box and use a 6” round port 22 inches long that gives me a tuning around 32hz also puts me in the 10.xx in^2 per ft^3 range. That would be super easy to build if I do the port on one side. Might not be what I want in the end, but for testing? It would be quick and easy. If those numbers look good. Just woke up after my typical 4 hours of sleep.  

[Scotnemily]

So here would be the quick test box.

 

 

6" port 22 inches total volume after displacement of port braces and subs about 2.9 ft^3

[ehall8702]

With my hds2s I had like 3" between rear of speaker and port wall and the two subs with port wall behind them dented dustcaps inward from all I can think was basically a vacuum  related in the vent pole from not having enuff room to draw adequate air . Just thoughts that may help, keep port as far away as possible from back of subs, maybe above or below magnet center? ND if ur porting to the side do u have atleast 6" clearence between port opening and side of truck? If not ur gonna choke it there too.