ATC 2 inch Square 4 Ohm 3 Watt Full Rang Audio Speaker for Home Audio Board, Multimedia Systems DIY Kit 2 PCS

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2 inch 4 Ohms 3w speaker with internal magnet speaker audio stereo woofer loudspeaker. High-quality sound: Enjoy clear and powerful audio with our speaker's advanced technology and premium components. A 3W speaker is designed to handle a 3W amplifier operating at 3W peak with undistorted program material. Regular program material (voice or music) usually has an average power of about 1/10th the peak power... So, a 3W amp (at full undistorted volume) is putting-out about 0.3W average and the speaker can handle that. This means a 4-ohm speaker, also often called a low-impedance speaker, can process music or sound that could potentially over-circuit and seriously damage an 8-ohm amplifier. What can be even more confusing is that the speaker ohm rating can change depending on the frequency it's handling. The loudness of a loud speaker depends on more than just its impedance. Yes a 4 ohm speaker when driven with the same voltage as an eight ohm speaker will dissipate more power but whether that translates into more sound depends on the efficiency of the speaker and whether it is being over driven.