Enjoy excellent music output with the Bose 151 main speakers, which come with a nominal power handling capacity of 80 Watt RMS. Experience balanced music in any room with these speakers, which have an impedance of 4 ohms – Ideal for hooking up with a range of audio input devices. Get optimum performance when connected to an external amplifier with the 10 to 80 watts power of these Bose speakers, more than enough to drive clear, loud reproduction. Incorporating the bass reflect output feature, these speakers render music efficiently and accurately without losing any sonic color. With dimensions of 9.1 inches by 5.9 inches by 6.1 inches, these Bose speakers are compact and portable. Water- and weather-resistant, the Bose 151 can be used safely in your garden or terrace, doubling up as outdoor entertainment for parties or gatherings.