Got a tech question for Sound & Vision? Email us at AskSandV@gmail.com Q Essentially this is a two-for-one, as both Ed Mendelson and Sam V had very similar questions about connecting an external amplifier to a Marantz AV receiver. Ed wants to add a 3-channel amp to his Marantz SR7012 to power his L/C/R speakers. Sam wants to use his Marantz SR5013 for the audio processing but use a Yamaha RX-A3020 AV receiver for the amplification.