In order to enhance the performance of the subwoofer system, everyone having the home theatre at home should have to tune it. Actually, you can find the different types of the online helps for understanding how to tune the various models of the subwoofer designs. In case you are in need of tuning the ported subwoofer box, there are generally two ways available such as by mechanically and by mathematical equation.

## Tuning a ported subwoofer box:

When you **tune a subwoofer**, the very first item to be determined is a driver or loudspeaker which will be housed in the cabinet/box/enclosure. By this way, it said that at the point of the subwoofer box is ready to be constructed. Thus the tuning process of the subwoofer box will be successful. For the subwoofer tuning process, you should have to follow these steps such as,

- Step 1 – First of all you should have to set a multi meter to take the current measurement. You must attach this multi meter in the series between the amplifier and subwoofer. Then, you can use the best model of the frequency generator to drive this subwoofer. When it comes to the impedance, it will dip to its lower level for this kind of the woofer box. For the sealed enclosure, it will peak at the highest level.
- Step 2 – The multi meter will in fact read the higher result for the ported subwoofer box actually at the resonance frequency. If the specific resonance frequency is not the same similar to the predicted resonance frequency, you should have to adjust the port length.
- Step 3 – You can do
**tuning a sub box**to the particular frequency with the help of this mathematic equation such as Fb = the preferable tuning frequency of the enclosure in the Hz. Lv = the length of your port in the measurement of inches. R = the inside radius of the home theatre system’s vent tube. Vb = the internal volume of your system enclosure in the cubic inches.

### Some other port configurations:

In these configurations, you can have three more steps including,

- Step 1 – You have to divide the enclosure volume actually by the amount of ports which are being used for the different types of port designs. You can also use the calculation result as the Vb value in the formula Lv = [(1.463 x 10^7 x R^2)/ (Fb^2 x Vb)] – 1.463 x R in order to find out how long every square port must be.
- Step 2 – In this step, you have to calculate square vents or ports with the formula such as R = Square root of (A/Pi) from which you will get the value of R.
- Step 3 – Small/Thiele parameters are determining the performance characteristics of the loudspeaker. In this step, you can do all those measurements necessary for you.

In order to setup the home theater room**, **you have to consider all these parameters and measurements using the required formula.