Xantech XSS26100W 6-Zone Speaker Selector (Discontinued by Manufacturer) Amplifier:Product Information-Features-Power handling: 50 watts per channel RMS; 150 watts peak Selectable impedance matching for 1, 2, 3/4, or 5/6 speaker pairs Compatible with 4-Ohm or 8-Ohm speaker systems Allows switching between two amplified inputs 42dB maximum attenuation Isolated inputs for compatibility with all amplifiers :Physical Characteristics-Height-2.5":Physical Characteristics-Width-17.5": Physical Characteristics-Depth-6.3": Power handling: 50 watts per channel RMS; 150 watts peak Selectable impedance matching for 1, 2, 3/4, or 5/6 speaker pairs Allows switching between 2 receivers and 6 zones with selectable impedance matching Features individual on/off selection for each room and 12-step volume control with 42 dB max attenuation Isolated inputs for compatibility with all amplifiers