A simple method of deriving a center or third channel without the use of an extra transformer or amplifier, (a) 4- speakers are connected to 8- amplifier taps. 8 and 16- speakers connect to 16- taps, (b) By blending the inputs it is possible to cancel out undesired crosstalk. Derived Center-Channel Stereo System
Find the best amplifier circuit diagram on AmplifierCircuits.com, TDA Amplifiers, 200W Subwoofer Circuits, TDA7294 Audio Amplifier, 1000W Audio Power Amplifier