I was particular for few features in Marantz AVR line up. 6013 for sure is a fantastic AVR but I wanted to have Auro3D and 2 line display. In practical, port hole display won't give you enough information. Also when paying so much, except for the audio quality, I didn't want to compromise on the features.Just wondering that if every channel needs external amplification why go for 7013 and not for 6013 or 5013 ?
In any AVR, the RMS watts mentioned is for 2 channels. When it is distributed to 9 channels, it would come down drastically and AVR requires lot of potential to drive them all at once. It would eventually heat up the AVR amplification section.
I wanted to offload the amplification from AVR and by pass it to PA using pre-out. Also I previously had an AVR that didn't have pre-out. With pre-out available, the power amplifier feeds constant power and I could hear small nuances even at lower volume. Any time hearing through a power amplifier sounds better than from the AVR.
I went one step ahead and added power amplifiers; still the AVR can drive all the speakers but I benefit better power and reduced heat. Yet AVR would cater its purpose for those who don't want to go for a power amplifier.