Quote: Originally Posted by
XC-C30 
A passive radiator changes the parameters of said driver dramaticaly, giving you more options. Like a sealed or vented box would have certain volume, certain volume is needed when using a radiator. I'll give you an example of the setup I'm building: The sub is a peerless XXLS 12", the Fs lays at 17.7Hz. Now, with the matching passive radiator, the Fs changes to 10.4Hz, allowing the sub to go even lower, if possible, in the right environment.
ok...and "F" meaning Frequency, right? got it.
but im still confused how you can manually tune it? is it a turn of a knob or is it just by the environment you put it in?