Speakers and back-pressure ratio. RUMBLE

 

I am making a speaker box and want to maximise the rumble as it is for a special effects type application.

 

I have practically tried all variations of speaker size and back chamber size and shape.

 

anyone got any good ideas how to calculate and maximise this effect.

aw come on , I cant believe there are no base heads out there.

 

anyone know anything about speakers at all?

you want to maximise the echo effect.... in the old days hard core bass fans used to instal a speaker in their chimneys and let the whole chimney thingy do the work for them! (my dad told me!)

 

take a look at current products and see how they work.

by "Rumble" do you mean distortion?

i thought he meant just a strong bass effect.... but lets wait for him to answer before we are sure!

lets wait for him to answer before we are sure!

 

yeah, I was hoping for that myself before you replied.

Sorry gents.

 

been out trying things.

 

this is the skinny on it.

 

The back of the speaker produces an out of phase wave that cancels out the primary wave coming from the front.

 

so if you are clever you put the speaker into a box. Now if you can get that out of phase back wave to slow down by travelling through a foam type material or just by simply having it travel about two meters before it remerges from a smaller hole at the bottom of the box. then tadaaaa you get reinforcement rather than cancellation!

Yay!

 

Big speakers shift air. so size matters.

It's a diameter thing, think about it.

the small speaker would disassemble itself if it tried to flex that much.

 

Thanks for the help.

all solved.