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Here is a typical result when measuring a single full range driver in a closed box type enclosure:
By inspecting the impedance plot we can determine that this is a closed box type of loudspeaker
system from the presence of the single impedance peak in the low frequency range. From the
impedance plot alone we can identify the closed box resonance frequency F(sc) = 95 Hz by reading the
center frequency of the impedance peak from the frequency scale below. The impedance rise at higher
frequencies is due to the inductance of the voice coil. At very low frequencies (1 Hz) the system's DC
resistance is seen to be about 3 Ohms. The height of the impedance peak is largely dependent of the
mechanical Q of the driver or system. The Measured Parameters bar at the right side of the screen
show that this closed box system's resonance is at 95.55 Hz with a system Q(tc) of 0.6232 (displayed in
the Q(ts) field). The system's Q(ec) and Q(mc) appear in the Q(es) and Q(ms) fields respectively, for a
closed box measurement. The R(e) field gives the DC resistance of the system.