Speaker specifications generally include:
Specifications label on a loudspeaker
Speaker or driver type (Individual units only) –
Rated Power – Nominal or continuous or RMS
power and peak or maximum short-term power.
Impedance – 4 Ω, 8 Ω, etc.
Baffle or enclosure type (Finished systems only)
bass reflex, etc.
Number of drivers (Finished systems only) –
2-way, 3-way, etc.
Crossover frequency(ies) (Finished systems only) – The frequency
or frequencies where electrical filtering occurs.
Frequency response – The measured or specified variance in sound
pressure level over a range of frequencies.
Thiele/Small parameters (Individual units only) – These include
the driver's Fs (resonance frequency), Qts (the
driver's Q or damping factor at resonance), and Vas (the
equivalent air compliance volume of the driver).