Fans in semi-enclosed AV unit?

[xanalog]

View attachment 479152 For clarity...these are "heat sinks"
View attachment 479155This is not a heat sink, it's a "fan board".

Noctua fans are none of those: They are simply da-Bomb and they 'take a licking [w/o ever] keep ticking'!

 

[Sal1950]

Noctua fans are none of those: They are simply da-Bomb and they 'take a licking [w/o ever] keep ticking'!

Right, after just checking out the name on the fans in his cabinet "Gaiatop", they don't appear to be quality, low noise fans
like Noctua. I've used Noctua fans for many years in my computer builds and gear cooling. IME They do live up to their claims.

 

[Berwhale]

You could sit these fans right on top of the amps over the heatsinks...

https://www.amazon.co.uk/dp/B081RQRY3G

No, they are not as quiet as Noctua fans (I have five of those in my PC ), but they are cheap and do the job. I think you would struggle to hear them from 3 feet away if they are on the low setting.

If you are feeling flush, you could get some Noctua NV-FS1 fans... https://www.amazon.com/Noctua-NV-FS1-Multi-Purpose-Award-Winning-NF-A12x25/dp/B0D179T54Q

 

[xanalog]

I'm looking for advice on my fan setup in my semi-enclosed AV unit

Too bad you don't have any NAD hardware, for these Noctua fans (#NV-FS2).

But at $90/each, you can buy 2 FOSI amps for the price of 4 fans that you'd need!

 

[Sal1950]

No, they are not as quiet as Noctua fans (I have five of those in my PC ), but they are cheap and do the job. I think you would struggle to hear them from 3 feet away if they are on the low setting.

They're not too bad either, mine came with a three level switch to choose speed. I have one set-up behind my 85" Samsung TV to keep it cool.

https://www.newegg.com/p/1YF-01JK-00022?Item=9SIB7W5GZV4638&Tpk=9SIB7W5GZV4638

 

[olds1959special]

I got the amp that I thought was overheating back from the tech. He said it wasn’t overheating, and to switch the L and R amps to see if it’s the speaker causing it. I did that and found that actually the amp IS hotter, but not as hot as I thought maybe. I measured the temp on the side of the case where the heat sink is and noticed the “hot” amp was running 5-7 degrees hotter at around 90F, while the corresponding amp on the other side was at 85 and the other two on the bottom were at 83.

I called the tech and he said it's nothing to worry about since it's not really that hot and the bias should be within range on both amps. Also he said the top amps will run hotter since they are powering the mids/highs which have a different impedance.