The Thiele-Small specifications are a set of parameters used to describe the audio characteristics of a speaker driver, named for Neville Thiele and Richard Small. The ten original Thiele-Small parameters are Fs, Pe, Qes, Qms, Qts, Re, Sd, Xmax, Vas, and Vd. The parameters Xmag andXsus have been added to this list.
Sensitivity, SPL and sound-pressure level all refer the same specificatio
In order to get the correct impedance, you would need to wire 2 speakers in series for each speaker output on the home stereo system. Wiring two 4-ohm speakers in series results in a total impedance of 8 ohms. The speakers should all be the same wattage, and the wattage should match the power output of the stereo.