So I see winISD modeling gives frequency response model up to about 200hz . If I am looking to make a box for a regular bookshelf speakers which i don't expect to play sub 100hz frequencies will the sound signature depend on size of the box?
Is it correct to assume that box size is really to optimize bass performance
Is it correct to assume that box size is really to optimize bass performance
There are far more knowledgeable folks than me but I think the box volume is indeed important between 100 and 200 Hz. I would assume that this holds true even higher like when you are adding a midrange driver in a sealed compartment.
Yes/yes, or more correctly:
T/S theory peters out at the driver's effective upper mass corner [Fhm] = 2*Fs/Qts'
Qts' = Qts + any added series resistance [Rs]: HiFi Loudspeaker Design
GM
This is a little too complex for now) need to set aside time to read.
But just to eliminate standing waves what are general proven ways to help that.
1)most suggested polyfill and put lots of it
2)egg crate foam not recommended. I've seen them used together with polyfil on many bw 600 series speakers
3)some manufacturers route cuts along inner speaker walls . Polk audio did it on their nicer sda speakers made in 80s. Not sure if this is helpful
But just to eliminate standing waves what are general proven ways to help that.
1)most suggested polyfill and put lots of it
2)egg crate foam not recommended. I've seen them used together with polyfil on many bw 600 series speakers
3)some manufacturers route cuts along inner speaker walls . Polk audio did it on their nicer sda speakers made in 80s. Not sure if this is helpful
In general, for any given open back driver, the box controls the Q of the bass. Too small a box and you'll get a peak, too big and an early rolloff. Same applies to 4-5" midranges with open backs, though that peak/drop is now in the range of 200-400 Hz.