What is acceptable equipment heat?

Discussion in 'Smart Home, Climate Control & Security Forum' started by Tesslar, Jul 1, 2018.

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    1. Tesslar

      Tesslar
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      i have bespoke fitted furniture housing all my AV equipment. It has bottom and top vents and the rear partitions are spaced 75mm off the rear wall. To top it off in the centre is a redundant gas flue venting vertically. Despite all that, my Denon amp is still running very hot. I’ve now set computer fans on the amp set to come on at 24 degrees with an alarm tripping at 35 degrees. With the recent weather having an ambient temperature in the high 20s it’s tripping at 35 so I’m opening the doors and keeping around 32.
      Questions: am I worrying too much? Can the amp run hotter?
       

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    2. Lesmor

      Lesmor
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      Are you perhaps running 6 or 4 ohm speakers?
       
    3. Tesslar

      Tesslar
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      6 ohm
       
    4. Lesmor

      Lesmor
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      Have you set the impedance switch on your Denon to 6 ohms ?

      I just bought a Denon 8500 and left the unit as it was out of the box
      The amp became very very hot more than any other AVR i have owned including my old Denon 7200
      My speakers are 4 ohm so I set the impedance in the Denon to 4 ohm and now it runs very cool
      i also get a performance boost into the bargain
       
    5. Tesslar

      Tesslar
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      My fronts and atmos are 6, my rear L&R 8. Will 6 for all be ok?
       
    6. Atavus

      Atavus
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      Below 60 degrees I wouldn’t be concerned.
       
    7. ashenfie

      ashenfie
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      Body temperature is 37c so not doing to bad.

      P.S. don't switch the Amp to 4 ohms as that only to comply us regs. and generally considered not a good idea.
       
    8. Lesmor

      Lesmor
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      4 Ohm Speakers with A/V Receivers or Power Amps
      If you check the Denon manual it should say that if you have any speakers at 6 ohm then select the 6 ohm setting
      Most of my speakers are 4 ohm and I have my Denon 8500 set for 4 ohm I also have 2 x 8 ohm in ceiling speakers ( Atmos) with no issue

      Give me one good reason other than what was published by Audioholics ( I disagree with there findings and comply with what the manufacturer recommends) why it is not considered a good idea?

      If the OP has a temperature problem he should give it a try on 6 ohms and like me he will probably find a instant difference in running temperature
       
      Last edited: Jul 1, 2018
    9. ashenfie

      ashenfie
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      IMHO the OP AV temp sounds pretty good, but if you have an issue with heat then address that issue rather than limit the AV equipment.

      Denon are going to tell you to set the switch as it then complies with US requirements.
       
    10. Lesmor

      Lesmor
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      I don't disagree but its the OP that has a concern about temperature

      and I have found without any doubt that matching the speaker impedance on my Denon 8500 reduce it from very hot to cool
      If I hadn't done this then the high temperature was such a concern that the 8500 would have been returned
      I have done this with every AVR I have ever owned that offered that option

      The OP is also free to ignore my posts
       
    11. Hixs

      Hixs
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      It get's hotter here, for months on end, and my gear does just fine with zero additional cooling.
       
    12. witchdrash

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      I wouldn't be too concerned, a lot of electronic equipment can run much much hotter than you'd expect.
      I have a switch in the loft that's currently reporting back it's temperature internally as 73 degrees and it's fine.

      I wouldn't expect your amp to hit anywhere near that temperature, but I reckon it would be fine at 60 degrees.
       
      Last edited: Jul 4, 2018
    13. Hampy1972

      Hampy1972
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      Think I would be worried if I owned a Onkyo AV receiver, boy! you can boil an egg on those things like in middle of December when its -15 outside.
      Luckily my Pioneer which I replaced it with is cool as a cucumber now days.
      I leave the patio door open, good for air circulation.........
       
    14. fayeanddavid

      fayeanddavid
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      As stated elsewhere, I would consider anything above 50C external as hot from a solid state device, that could indicate an internal temperature of 60/65C which is well within operating limits I would suggest
      However, if an user is concerned then vent and fan cool your item, anybody checked what the user manual states in terms of ambient operating temperatures, or indeed product operating temperatures?
       
    15. Hampy1972

      Hampy1972
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      Ventilation is important, fan or no fan but AV equipment just like vehicles on the road by the manufacturers are tested from extreme environment to another... top temp around 60c would be fine if one starts to stack AV upon AV, deck upon deck then trouble will not be far behind...

      Systems need air to breathe, just like us....
       
    16. KenMasters

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      I think you'll have more success installing those fans where you have your rear vent and creating an opening underneath the front of the cabinet, drawing warm air out and pulling cool air in.

      Yes, because you're limiting the output from your receiver. Personally I would want the full performance potential I paid for.
       
    17. Lesmor

      Lesmor
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      I really wish that this could be quantified because I have followed the manufacturers recommendation and impedance matched quite a few AVR's over the years with 4 ohm speakers and every time without fail the system sounded better in 4 ohm and certainly no loss of performance
      I even switched back to the 8 ohm setting yesterday there was no obvious improvement to sound but there was a marked increase in temperature
      I am open minded so if there is any way to audible test this lack of performance theory I am happy to give it a go
       
    18. Derek S-H

      Derek S-H
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      OP - you have clearly invested a lot of time and money on your system, so I can completely understand your concern about optimal operating temperatures/overheating.

      First of all, it sounds like you have factored in ventilation issues into the design of your AV furniture, so that shouldn't be a problem.

      Secondly, I understand that modern AV equipment have thermal trip switches or cut outs to stop your gear overheating/melting/bursting into flames. Has that ever happened to you?

      All AV amps run hot to some degree, but that's hardly surprising considering how crammed with components they are. I watched a couple of films last week and my AV stand has no enclosed back or sides and everything is on its own separate shelf, neither do I run any cooling fans but everything was absolutely fine.

      I wouldn't worry unduly.:)
       
    19. KenMasters

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      If you find nothing lacking in dynamics, carry on. Only pointing out that the reason it runs cooler is because the current is being limited in order to pass safety regulations in certain regions. My personal preference is to modify the cabinet to deal with the heat problem rather than limit the AVR's output - but certainly yours is an easier way to go about things.
       
    20. ChuckMountain

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      How do you get a performance boost ?

      What volume levels do you listen to?

      If you disagree with what Audioholics put then nobody is going to probably convince you otherwise.

      If you switch to lower impedance then you lower the voltage rail a bit which in turn causes the amp to run cooler. It's physics at the end of the day, this may not give you as much power overall but it depends on the amp.

      There have been many threads on this over the years one here with an explanation.

      Confused over ohm settings on amp.
       
    21. Lesmor

      Lesmor
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      I don't know why this has become a big deal the OP is free to ignore my suggestion and run his AVR hot
      I don't dispute that you lower the voltage rail and it runs cooler
      but why argue against what the manufacturer advises
      I can only repeat again that in my listening tests and having tried it numerous times I prefer the "performance" from my system when the AVR is set at 4 ohms
      I listen at -10
       
    22. couplands

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      I think the original question is about what a reasonable operating temp is for electronic gear. Not about how to improve cooling (which it seems is all good).

      We used to run computers in air conditioned rooms and set them at 20c. Due to cost of power for air con, it became the norm to run the computers up to 35c. There was no significant increase in component failure due to the higher temp.

      I'd suggest following the manufactures guidelines for operating temp (I'm going to check mine when I get home, as my Denon x6300 runs quite warm).

      Cheers

      Simon
       
    23. pcaddy

      pcaddy
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      I bought one of these AC Infinity, AIRCOM T9, they have different models dependent how you wish to vent the air, top exhaust was best for me, I live in an attic flat and it gets really hot in the summer 30°C + and my Arcam AVR gets so hot it's hard to touch, it's standing on top of my system shelves in free air, the above system keeps it nice and cool.
       
    24. ChuckMountain

      ChuckMountain
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      It's to meet standard specs. In the same way car manufacturers can run a V8 with only 4 cylinders to pass emissions tests, naughty really. You don't buy a V8 to only run 4 cylinders in reality.

      Having said that it's all up to the owner as to what they like and how they hear it. :)

      I have a laser temperature gun which from memory was under £20 from Aldi. I use it for a variety of things but you can easily test the casing and if you can see internal components then those too.

      As you say most stuff will run in ambient temperatures a lot hotter which means internal components are running even hotter. The latest Yamaha docs don't seem to mention temperature :(
       
    25. fayeanddavid

      fayeanddavid
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      You know, if it is a perceived issue that contact the manufacturers and get the data............the rest is pure conjecture!!!m
       
    26. ChuckMountain

      ChuckMountain
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      In relation to what, the operating temperature? o_O
       
    27. fayeanddavid

      fayeanddavid
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      Of course, given that seems to be the conversation.....

      Seems I’m having a difficult night in people understanding me!!!
       

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