What is meant by "tuning" a sub box

[Weapon_R]

Explain.

[Primer_Drift]

Tuned, a reference to the loudest specific soundwave (range) produced by the box design/materials.
As I understand it, the box will respond differently to different tones depending on its internal shape, density, and air volume. To be tuned, means to be set for certain sound wavelenths, measured in frequency (Hz) and amplitude. For example if you have had a set of subs in your car, there will be a certain bass tone that seems louder than others, this is the resonance frequency. It implys that the box will allow greater sound resonance, at a specific tone or set of tones. A better question is, what is your box's tuned frequency. Most bandpass boxes have a specific tuned frequency.

[Moonracer]

Well you want to tune it to give it certain characteristics, for example: a smaller bass reflex (no port) will give you a higher resonance frequency giving you tight bass at the higher low end frequencies. You can lower it by putting the driver in a larger box or a different design altogether. A ported design gives you a more detailed way of tuning and giving you the ability to give the driver/enclosure a lower resonance using a smaller box. But again the bigger the box/ports the lower the resonance. Now you're asking wtf is resonance??? lol The resonance is the frequency at which a driver either in the free air or in an enclosure will vibrate at it's most efficient. If you tune it incorrectly it will not sound very even, you would notice that certain frequencies would be very loud while others barely noticeable. You want to be able to hear all frequencies as even as possible. So to "tune" you need to know the free air specs of the driver and calculate what size box/ports and such you will need to use to achieve this.