Introduction to:

Spice Simulation

Baffle Step

Glossary of Symbols:

f_S: Resonance frequency of driver

V_AS: Volume of air having the same acoustic compliance as driver suspension

Q_TS: total Q of driver at f_S

R_E: dc resistance of driver voice coil

L_E: voice-coil inductance
(it is only used for voice-coil impedance diagram)

Q_MS: Q of driver at f_S considering driver nonelectrical losses only

Q_ES: Q of driver at f_S considering electrical resistance R_E only

R_g: output resistance of source (represents any resistances between source and driver - for example resistance of crossover inductor)

Q_E: Q of driver at f_S considering system electrical resistance R_E and R_g only

Q_T: total Q of driver at f_S including all system resistances

Q_L: enclosure Q at f_B resulting from leakage losses

f_B: resonance frequency of vented enclosure

Q_TC: total Q of system at f_C including all system resistances

f_C: resonance frequency of closed box

V_B: Net internal volume of enclosure (without port volume!)

R_AP: Acoustic resistance of port losses

R_AL: Acoustic resistance of enclosure losses caused by leakage

R_AB: Acoustic resistance of enclosure losses caused by internal energy absorption

P_e: nominal electrical input power (defined through R_e): P_e=R_e*(e_g/(R_g+R_e))²

e_g: open-circuit output voltage of source