Vented Box Calculator according to W.J.J. Hoge

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This set-up provides the highest precision and a flat frequency response according to W.J.J. Hoge

Input Thiele/Small and Vent Parameters

A dimension ratio of 1 : 1.618 : 0.618 provides cancellation of resonating frequencies inside the enclosure, this dimension ratio is used to calculate the cabinet dimensions.

f_s, Q_ts, V_as, V_d and V_n must be entered

TS Parameters

f_s :

Resonant frequency of the driver

Q_ts :

Total Q of the driver

V_as :

liters

Equivalent volume of compliance

Vent Parameters

V_d :

Diameter of vent

(The vent should have at least 1/3 of the driver's cone diameter)

V_n :

Number of Vents

Enclosure Calculations for Q_L = 7
V_b =	liters	Calculated Enclosure Volume
F_b =	Hz	Port alignment frequency
F_-3 =	Hz	3dB Down Point
SPL:	dB	Efficiency in dB (1W/1m)

V_{n =}		Number of Vent(s)
V_d =	cm	Diameter Vent
	cm²
V_l =	cm	Length of vent

Move the mouse over the Plot Line and you will see the Frequency and dB values at that position.
You can zoom in by selecting a range with the mouse.

Frequency Response

Extended Port/Vent Calculator

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