I have a Connex amp that requires a heat sink of 1.5C/W. It will be retrofitted to a passive speaker cabinet to make it active. I would like to use a black anodized sheet of aluminium, 3mm or 1/8”. Is there an easy way to calculate the size? The amp is rated a just under 300 watts into 8 ohms and the speaker’s nominal impedance is 8 ohms.
Not sure the full answer is in here, but this is worth a ready if you haven't seen it already: https://sound-au.com/heatsinks.htm
If it is something like the CxD300-8R and Class-D, then it won't require very much heatsinking.
I'd always go for the biggest size that you can fit though - you can never have a heatsink that is too big.
You can also get heatsinks that are large rectangles, but with quite low profile. Fins would always be better than sheet (observing orientation for heat to flow upwards).
I'd always go for the biggest size that you can fit though - you can never have a heatsink that is too big.
You can also get heatsinks that are large rectangles, but with quite low profile. Fins would always be better than sheet (observing orientation for heat to flow upwards).