MEGA AMP : 60W stereo hat for Raspberry PI

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<80°C max is a safe value. But don’t worry for the safety side there are 2 securities in case of overheat the dac will cut as well as the power supply.
Yes 6ohms will draw a bit more current.

There is also a way to increase the gain using JP trace under the board, but it will increase heat if you intend to use it without fan might not be a good idea.

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@Raspiaudio - I received my mega amp today (via amazon). I’ve plugged it to the pi and usb-c power. In volumio I’ve set the DAC to HifiBerry Amp2. Music shows as playing on the app but I’m not able to get any sound out of the mega amp (either via headphones or speakers).

The fan on the mega amp is not spinning, my understanding from the thread is they will spin continuous, is that correct? Is there something I am missing?

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Hello

Are you using the USB C on the Mega amp? you should
Are you using a USB C PD power supply? one that supports one of those voltage : 20v 15v 12v

thx

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Yeah powering through the usb-c on the mega amp; the pi is working so power is going through to that at least. Just no other signs of action from the amp part. Is there anything I can probe with a multimeter etc?

Used 3 different usb-c PD adapters rated at 100W for 12/15/20V with the same results

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the fan no spinning is stange, remove to plastic cover ant try it see the fan is not blocked by something, check also the fan is well connected

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have done that now, fan spins freely if pushed gentle with a pick.
I unplugged the fan connector (with the power off) and plugged back in, seems solid. gave the wires a gentle tug and they seem well connected to the plug and solder joints. does not work under power though

Does the fan spin immediately with power; even if the mega amp board is not connected to the pi? Is the fan controlled directly from the board or the chip output? maybe i can follow the power trace to see where theres power etc

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Yes, when you plug only the USB C on the Mega Amp and not connected to the RPI you should have the fan spinning. So please send it back thru Amazon, send me a private message if you need help.

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