Damn, no kidding! That is a considerable amount. Great idea, I like it!
The reason for a temperature differece between the two sides of the amp would be the bias is set higher on the channel that is running warmer. Ideally they should be the same. They are on my 250.
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With active cooling the temp difference is very little. I wonder how many mv(?) the bias is out to cause a +10F difference? I could be a very, very small amount and well within spec.
Heat is interesting in the way it will build up in a passively cooled design likely exaggerating the differences.
It’s certainly close enough for me and I certainly wouldn’t send it back for it.
I just checked after playing a spirited levels for a couple hours and they are ~1F different. Negligible.
Sounds like you are close enough for government work, as they say!
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Can I get the make and model of the fans?
Thanks!
Of course, I should have posted. Noctua has many variations.
These are 120mm and super quiet. I also use 140mm of various CFM/dBa. They run for years and years. I buy the 3-pin model and simply wire up a 12v supply to feed them all.
I also just measured my BHK250 using a thermo gun, and it came back ~115F/105F for the left and right, respectively. Though the left side is semi-enclosed as it’s right next to another rack whereas the right side is wide open.
Thank you!! Really appreciate it!
Passive cooling (fins, heat pipes, heat sinks, etc.) are heavily dependent on the local micro climate and so are at the mercy of local air flow. If the local airflow is blocked or altered from a “free air” environment (think open table top) then temperature variances are normal. When desktop PC’s were still in horizontal cabinets I was out of room so I placed the PC on its side like a tower cabinet would be. In less than an hour it shut down on overheat just from the altered airflow inside the cabinet. I ended up taking the outer cabinet off and leaving the mobo exposed. That solved the overheat issue and also made upgrades a lot easier. FWIW.
Edit:
As Brett said heat is the enemy of almost all electronic devices.
The inside heat sinks of my 300s run hotter than the outside sinks. I use to have solid side panels and mesh doors on this stand, the amps & P20 ran a lot warmer then.
That is a beautiful setup.