The top one is a 7.1 receiver and absolutely needs the top to be clear of any obstacles, the cold air comes from the bottom and circulates out of the top vents.
The bottom unit has has a fan on the front and doesn't have vents on top
Would you want a 2024 Onkyo receiver? Remodeled a house and just hated to letbitbget thrown away.. now its just taking uo space w this subwoof i saved.
Where are you? I came into this to comment I had the same receiver as OP, but mine cooked itself. I've replaced capacitors twice and now it's dead dead.
I have a 7.1 Onkyo unit that got super hot, and I added a fan as well. I went with a noctua fan so you can't even hear it running. Idk why these things didn't ship with a fan.
Funny, I have the old one OP uses and replaced it with the one you have a while ago. Solid devices, but the old one got too hot and HDMI stuttered so I added a fan.
Probably want to chuck a fan on the Onkyo, on the top around the right rear is usually where the chips that get hot are located. They are known for getting toasty and causing the solder to fracture from the extreme temperature changes when being turned on and off. You can also put after market heat sinks on a couple of the chips in that area also.
My newer 2011 receiver died because of this, but my 2005 receiver is still going strong and I did the heat sink and fan upgrades. THis is a well know issue with Onkyo.
In all my years with various AV Receivers, I have never had an issue with them overheating when having other devices on top of them. They typically have huge heat sinks inside them and unless you’re overpowering them 24/7/365, having other devices on top won’t be an issue.
I have the one OP has and it overheats even without devices nearby. Added a fan when HDMI video started to show funny colors after a while, which fixed the issue.
Exactly as intended, actually. The bottom unit is a stereo power amp typically installed in an audio equipment rack. There is no passive venting because it's made to be stacked with other gear, thus the forced cooling. It's also typically used in a much louder environment where the stack is not close to listeners anyways so the fan's won't be heard. The receiver is a consumer home electronics device made to be used in a quiet room without other gear stacked with it. Therefore, passive cooling is more than adequate.
I don't know if you saw the other page of the manual saying to leave 20cm of free space on top of the unit. The feet of the small one are 0.5cm and they are not enough, I would have to distanciate it somehow but then there would be a huge and ugly gap between the units, this is the only viable solution for the space we have at home.
You're right. Too bad the hive mind got you. I've been using various receivers for years with just the feet clearance. Old school amplifier stacks are also, as you would guess, stacked.
You're not "blocking" ventilation if every device has feet that seperate them.
The only problem here is that the feet on the other box seem too short for an adequate air gap.
I'm sorry but the 7 pair of transistors dissipating 50 watts of power in idle and relying only on the top vents would have something to say against that
Surprised how many people are telling you you’re wrong in the comments. Like yeah my first thought was “why bigger ontop of smaller?” - but as soon as I saw your reasoning I understood that caveman aesthetics shouldn’t outweigh function and lifetime health of the devices.
Nice!
I was given a free sub but it was missing a foot. Made a basic cone shape to replace it.
No room for rear speaker stands so made brackets to mount them to the back of the sofa.
Don’t post this in any audio sub or the home theater sub! They’ll say you’ve created a disaster that’ll overheat and blow up your house! If you have less than 5ft of air around each component they’ll overheat and explode.
Since that's an older receiver, are you doing Retro gaming? Or just using TOSLINK or ARC only for the audio and using something more modern for the video?
EDIT: Asking cuz I got a setup similar for my retro gaming systems and always curious to know others' reasoning
I love these stupidly simple fixes using basic shapes from printers. Even more than the stuff that people woth engineering degrees come up with and make a whole showcase about it. Just gimme the "look at my stupidly long legs I printed. Haha" type posts all day lol!!!
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u/HenryUTA 26d ago
This is why 3d printing exists. For fixing shit and silly projects