# Calculator for Bass Reflex (Vented) Cabinet

 Bass Reflex Cabinet (Vented Cabinet) according to Hoge Internal volume with one decimal Please enter decimal separator as "." ------------------------------ Driver ------------------------------- -------- Bass Reflex Tube -------- Resonance Frequency fs in Hz: Equivalent volume of compliance Vas in litre: Driver's total Q factor Qts: Diameter in cm: *) No of Tubes:*) Cabinet volume in litres: Cut-off frequency f3 (-3dB) in Hz: Cut-off frequency f8 (-8dB) in Hz: Efficiency in dB (1W/1m): *) Please note: The bass reflex tube should have at least 1/3 of the driver's diameter to prevent singing noise (for two tubes ¼, for 3 tubes 1/5, for four 1/6). . Length of bass reflex tube(s) in cm Diameter of bass reflex tube(s) in cm No of bass reflex tubes Total area of bass reflex tube(s) in cm2 Ql This set-up provides the highest precision and a flat frequency response (according to Hoge) © Iris Strassacker, 2004. All rights reserved - Warranty excluded

Total Q factor Qts correction
Resistors, cables or a coils that are being used to connect a loudspeaker show a DC resistance. This DC resistance has an influence on total Q facto Qts and, therefore, needs to be considered. The following calculator makes it a little bit easier for you; the result is automatically entered into to calculator at the top.

 Qts Correction Calculator (Qts-Correction) Q factor Qes, Qms to be entered with two decimals Please enter decimal separators as "." ------------------------------ Driver ------------------------------- ----- Crossover, cable ----- Electrical Q factor Qes: Mechanical Q factor Qms: DC resistance Re: Coil's DC resistance R ... in Ohm: Qts old of the driver only: Qts new with cable, coil, ...: © Iris Strassacker, 2004. All rights reserved - Warranty excluded