The PackLite © A1 delivers 250W of true RMS power through a single channel of high-fidelity audio amplification. It is completely optimized for use with the Bose PS1 power stand and B1 bass modules, giving more power to Personalized Amplification users. The revolutionary circuitry of the PackLite © is protected in an incredibly tough, molded metal case about the size of a hardcover book. It also features distortion prevention and speaker protection circuits.