LA-80MKII | 8-Channel Unbalanced to Balanced Line Amplifier | TASCAM - United States,LA-40MKIII | 4-Channel Bi-Directional Line Level Converter | TASCAM - United States,2-Channel Line Output Converter with Digital Bass Enhancer,Amazon.com: Metra Electronics 2CH Mini LOC 150W and Turn ON : Automotive,LA-80MKII | 8-Channel Unbalanced to Balanced Line Amplifier | TASCAM - United States