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AJ Sealed Designer Software is for designing
sealed or closed theoretical enclosures.
Bandpass
Designer is freeware!! Download Here!!
Sealed
Designer is freeware!! Download Here!!
Vented
Designer is freeware!! Download Here!!
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Input Parameters
| The following speaker Theile Small parameters are required for input. These values, except Qtc, should be included with your speaker manuals or on the manufactures web site.
Qtc: Total Q of the speaker and box
Qts: Total Q of the speaker
Qes: Speaker electrical Q
Fs: Free air resonance of speaker in Hz
Vas: Volume of air equal to the speakers
spring characteristics in liters
Pmax: Maximum power of the driver in watts
Diameter: The diameter of the driver in
cm
Xmax: The amount of cone movement in one
direction in mm
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NOTES:
- IMPORTANT: MAKE SURE THE UNITS MATCH
(e.g. Vas is in liters not cubic feet).
- Qtc: choose a value between 0.1 and
1.5. A value between 0.5 and 1.2 should give good results.
- Pmax, Diameter, and Xmax
are not required for box calculation. They are used to
determine the power response curve. Vb, Fb, and F3 will
still be valid.
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Calculated Parameters
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The following speaker/box parameters are
calculated:
Vb: Volume of box (one to be built) in liters
Fb: Box resonance in Hz
F3: Half power frequency in Hz
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NOTES:
- F3 is the most meaningful parameter. The lower the
F3 the lower the bass. A F3 below 50 Hz should be suitable
for a sealed enclosure.
- Vb is the size (volume) of the box that needs to be built.
Generally, the lower the bass the bigger the box.
- For Box Calculator instructions go here.
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