Interesting/odd update on heat in the AVR. Against lots of opinions, I picked up another amp. I’ll get right to the topic. In previous posts answering my question I discovered I need to make settings changes in the AVR to bi amp. To try to get it to run cooler, but before I made any setting changes, I switched the amp and with no setting changes and the AVR now runs MUCH cooler. My amp sounded pretty good and I would recommend the Marantz 7055. It does it’s job well but I knew my speakers could be clearer. The system had what I would describe as a white noise in what should be a dead spot in sound. I get this game of gain is one of diminishing returns. Anyway I decided to go from the AB to a high dose of vitamin D Amplifier. After a lot of reviews I gambled and it paid off. I’m playing the long game and hope to quit spending for a long time now. Anyway I have no idea how or why the AVR is cooler considering the AVR and amp were both Marantz. I can only now take a SWAG and say I believe the Marantz 7055 was designed and intend for 8ohm use and I’m pushing 4ohm speakers. The new amp and speakers now are both legacy audio. Now to figure out how to bi amp the speakers on this amp. All the instructions for bi amping through the AVR assume I’m not using the pre outs. This amp was designed for bi amping. It has for channels and for separate transformers on four boards internally in one chassis.
This is confusing, and so I re-read all your posts, but still could not figure out clearly what's the issues were and how getting a second amp fixed the issues. Please do us a favor (I assume I am not the only one puzzled...), please clarify some points:
1) From your original post, you mentioned a) using the C60 pre outs only, yet the "receiver" still gets hot when it is not pushing anything...
That was clearly explained and dealt with by TLSGuy and others who mentioned the preamp mode setting option.
2) the performance of my speakers fluctuates depending on the time of day.
(That is a weird one, but it could be due to more than one factor, one being, since you are streaming only, your download speed at the time, could also be the provider's level control that may not be constant all the time, etc.)
3) From your last post, you mentioned you picked up another amp and then you said "Anyway I decided to go from the AB to a high dose of vitamin D Amplifier.", so does that mean you are now using the 7055 with an additional amp that is a class D amp?
4) You now mentioned bi-amp, and has not made any setting change, so how are you "biamping"?
5) You now also said "Against lots of opinions, I picked up another amp.", what opinions did you go against, I don't recall anyone suggesting you should not replace the 7055, and/or add a second amp.
I thought we were all trying to figure out the seemingly inexplicable behavior of your C60 as described in 1) above, such as whether you engaged preamp mode, and you answered no, so that would have been the main reason why the C60 still run hot, other reasons would of course be related to ventilation, i.e. not having enough space/clearance for natural cooling.
Please also note that using 4 ohm speakers will not affect the C60 because you are using external power amp and the C60 is used as preamp/processor only, as you said in your first post, it is
"..not pushing anything.."
To be clear, I am only asking questions as I want to learn something too, and am very curious to how adding another amp could (and seemingly has) fixed your original issues of the C60 running hot even just used as a prepro, and the variable performance versus the time of day as highlighted in your original post.
Thank you very much in advance for clarifying the above (that is, fill in the blanks) for me.