let me introduce my self...I'm agus from indonesia

I have problem to build the box speaker..

I have sbacoustic driver and want to build the floorstanding speaker. But I dont know how to calculate and get the ideal size and volume of the box. I plan to make the 3 way speaker with that drivers.

For all master audio, help me please to calculate it.

Thanks a lot of.

Driver :

Woofer : SB accoustic 5 inch

Mid Woofer : SB accoustic 4inch

Twitter : vifa XT25TG30-04

T/S :

1. Woofer 5" SB15NRX C30-4

Nominal Impedance = 4 ohm

DC resistance, Re = 3,1 ohm

Voice coil inductance, Le = 0.12 mH

Effective piston area, Sd = 82 cm2

Voice coil diameter = 30.5 mm

Voice coil height = 15 mm

Air gap height = 5 mm

Linear coil travel (p-p) = 10 mm

Magnetic flux density = 1.0 T

Magnet weight = 0.54 kg

Net weight = 1.48 kg

Free air resonance, Fs = 41 Hz

Sensitivity (2.83 V/1m) = 91 dB

Mechanical Q-factor, Qms = 5.3

Electrical Q-factor, Qes = 0.31

Total Q-factor, Qts = 0.29

Moving mass incl.air, md = 8.6 g

Force factor, Bl = 4.7 tm

Equivalent volume, Vas = 16.7 liters

Compliance, Cms = 1.75 mm/N

Mechanical loss, Rm = 0.42 kg/s

Rated power handling = 50 watt

2. Woofer 4" SB12NRXF25-4

Nominal Impedance = 4 ohm

DC resistance, Re = 3,1 ohm

Voice coil inductance, Le = 0.27 mH

Effective piston area, Sd = 50 cm2

Voice coil diameter = 25.4 mm

Voice coil height = 15 mm

Air gap height = 5 mm

Linear coil travel (p-p) = 10 mm

Magnetic flux density = 0.84 T

Magnet weight = 0.32 kg

Net weight = 0.75 kg

Free air resonance, Fs = 61 Hz

Sensitivity (2.83 V/1m) = 87 dB

Mechanical Q-factor, Qms = 5.3

Electrical Q-factor, Qes = 0.53

Total Q-factor, Qts = 0.48

Moving mass incl.air, md = 5.8 g

Force factor, Bl = 3.6 tm

Equivalent volume, Vas = 4.1 liters

Compliance, Cms = 1.17 mm/N

Mechanical loss, Rm = 0.42 kg/s

Rated power handling = 30 watt

3. Twitter : vifa XT25TG30-04

Nominal Impedance = 4 ohm

Nominal impedance [ohm] 4

Voice coil resistance [ohm] 3.0

Nominal power [W] 140

Short term max power [W] 950

Long term max power [W] 400

Operating power [W] 5.3

Sensitivity [dB] 91.5

Frequency range [kHz] 1.5-40

Free air resonance [Hz] 500

Voice coil diameter [mm] 25

Voice coil height [mm] 2.2

Air gap height [mm] 3.2

Voice coil inductance [mH] -

Eff. diaphragm Area [cm²] 5.4

Moving mass [g] 0.30

Magnet weight [g]/[oz] 240/8.5

Force factor [Bl] 2.5

VAS [l] 0.017

Qms 2.50

Qes 0.71

Qts : 0.55