Temps on Denon and Marantz

[ematthews]

I am either getting one of these two brands. Can anyone tell me which brand runs cooler in general? This will be in a semi closed cabinet. I will add a small fan but would first like to start with a cooler running brand. My old Onkyo 805 runs so hot you could cook on it.

 

[PENG]

If you are comparing equivalent models their running temperature characteristics will be roughly the same. If not well ventilated, use an external fan. I use two for my AV8801, never needed one for my Denon 4308 but I had 2 extra inches of space on top at the time, otherwise I would have to use a fan too. The AVR-X7200W does have fans in them. AH just reviewed it and the reviewer said the fans never kicked in during his test, but again it all depend on the natural cooling you can provide in your rack/cabinet.

 

[Swerd]

This will be in a semi closed cabinet.

It depends on what you mean by "semi closed cabinet". I keep my receiver in a cabinet that is open at the back and has a wooden door in front. When using it, I keep the door open. That allows warm air to escape and gives cool air from outside the cabinet a path to get in.

… but again it all depend on the natural cooling you can provide in your rack/cabinet.

Natural cooling depends on having at least two openings, preferably on opposite sides. Remember, warm air rises. Many cabinets have small openings in the back for wire access. Usually the backs are made of thin plywood or pressboard. When I first got my cabinet, I used a jig saw to enlarge the opening in the back.

 

[ematthews]

The cabinet has a door in the front that I will leave open. It has wire access in the back as well as a few slats open for air flow. I would never trust the Onkyo 805 in this, but I know it had a history of fire and running super hot.. When I went shopping I couldn't get over the fact of how light these new AVR's are over the Onkyo 805. That thing is a beast.

 

[PENG]

When I first got my cabinet, I used a jig saw to enlarge the opening in the back.

I did the same to keep my fanless 4308ci cool, used a jig saw as well lol. Then I replaced my fan cooled Oppo BDP-95 with the 105 that does not have a fan, so I had to adjust the shelf to give it a couple more inches of space on top. Obviously that took away a couple inches of space on top of the AV8801 that is at least as tall as the 4308 and of course it ran hot without the fans. 2 inches extra space on top of the enclosure made a huge difference in my cabinet.

 

[TLS Guy]

This is another reason I really dislike receivers.

I like nice neat installations. Receivers mitigate against this for the reason the OP is asking the question.

A pre/pro makes about zero heat. Power amps can be placed where they belong, out of sight and with adequate ventilation.

This principle was established back in the fifties, when neat installations abounded. Then Far Eastern receivers appeared and everything has been a mess since.

 

[PENG]

This is another reason I really dislike receivers.

I like nice neat installations. Receivers mitigate against this for the reason the OP is asking the question.

A pre/pro makes about zero heat. Power amps can be placed where they belong, out of sight and with adequate ventilation.

This principle was established back in the fifties, when neat installations abounded. Then Far Eastern receivers appeared and everything has been a mess since.

I disagree, and I think it depends. My prepro, Marantz AV8801 runs hotter than my amps and AVRs. I think that is because I typically listen to 70-75dB average with peaks to may be 90dB at the most. My power amps would cruise at under 0.5W average most of the time so their running temperature is basically slightly higher than idling temperature. The prepro on the other hand are always producing pretty much the same heat whether my power amps are idling or loaded.

My AV8801 prepro runs as hot as the AVR it replaced.

 

[KEW]

I recently got an Marantz NR-1605. I was impressed with the drop in temperature associated with the ECO mode. I did not measure it, but I am used to the top of my AVR's getting on the hot side of warm. With ECO on it stayed in the cool side of warm (whatever the hell that is!).

This doesn't really address your question, but it is relevant.

See posts #8 and #13
http://www.avsforum.com/forum/90-receivers-amps-processors/2200257-denon-x6200w-vs-marantz-sr7010.html

Unfortunately, I have not seen an evaluation of it as far as how ECO effects the performance.

 

[TheWarrior]

I think, both pre's and AVR's have been much 'hotter' since they've been routing HDMI and decoding video, anyway.

 

[AcuDefTechGuy]

This is another reason I really dislike receivers.

I like nice neat installations. Receivers mitigate against this for the reason the OP is asking the question.

A pre/pro makes about zero heat. Power amps can be placed where they belong, out of sight and with adequate ventilation.

Every electronic device transfers heat energy. The higher end pre-pros may transfer less heat than the mid-range ($3000) & lower-range pre-pros ($1500). But they all transfer heat energy.

I do personally like the idea that all amps should be placed externally for all electronics, all speakers, and all subwoofers.

 

[Cos]

My Marantz AV8802A does not run hot, neither did my AV 7005 for the brief time I had that. My Integra 30.5 runs really hot. Seeing that Denon and Marantz are very similar, I would find it strange that one comparable model would run that much hotter than the other.