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often we happen to be in the hands of transducers which we do not know the parameters needed to give him a box TSL properly. With the formulas that you will find Here you can calculate the box for your sensors without the necessary parameters. The box measures are obtained from calculations based elementary but reliable and your speakers will sound good anyway. Will certainly not be like those designed in the laboratory with adequate equipment but if you also comply with the procedure indicated some sonic satisfaction.
LEGEND:
DE = Outside Diameter Woofer Used (in millimeters)
SL = thickness of the wood used to make the Box (in millimeters)
LB = Box width (in millimeters)
HB = Height of Box (in millimeters)
PB = Depth of Box (in millimeters)
VB = net internal volume of the box ( in cm)
VBM = Inside the Box Volume Increased dall'Assorbente noise (in liters)
FORMULAE
LB = (DE * 1.5) + SL + SL
HB = ((LB * 2.16) / 1.66) + SL + SL
PB = (LB / 1.66) + SL + SL
VB = (((LB - SL) - SL) * ((HB - SL) - SL) * ((PB - SL) - SL)) / 1000000
VBM = 1.3 * VB
The measurements obtained are the external of the box. If you do not like you can give him another classic form, it is important to adhere strictly to the value of the net internal volume produced by the formulas.
Once the box, before mounting the woofer, you have to insert the sound absorber material that you can choose from: polyurethane foam (smooth or embossed), glass wool, dacron, CLOTH, ACRYLIC, PRESSED waste fabrics, these are the most used. I prefer the glass wool and failing that, the acrylic cloth that you can easily find in the cushions that are used in bed to sleep. In Department Stores they are cheap (around € 5 each) and within them there, ready to insert it into the right box and pressing, the cloth Acrylic. As for the crossover, if you realize a multi-way speaker, I recommend using at the moment those already made available on the market curandovi of selecting the most appropriate rate cuts as possible to the transducers used, then if you are able to calculate their own , even better. Later I will publish the formulas for the mirror box, the box in the Labyrinth, to calculate the Reflex Tuning and those designing the crossover.
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