Experience high-quality sound with the MartinLogan Motion 4i bookshelf speaker. This 2-way speaker features a 4-inch driver size, 150W RMS power, and a 4 Ohms impedance for enhanced audio performance. It comes in a sleek black gloss finish, adding a touch of elegance to any room.The MartinLogan Motion 4i is a wired speaker with banana jack audio inputs, making it easy to connect with various audio systems. This 1+ subwoofer system configuration produces superior sound quality, perfect for music and movie enthusiasts alike. With a weight of only 6 lbs, this speaker is lightweight and easy to move around.