![](https://aussie.zone/pictrs/image/0a4863ff-4b58-46e8-9266-dde5ef3fabc6.webp)
![](https://discuss.tchncs.de/pictrs/image/367855b9-f175-4b68-a9c1-aeeb8c3f8319.png)
It was probably a marginal product deliberately overdriven beyond “good design norms” to make it look good for the currently-missing data sheet.
Put it on a variable voltage power supply, run it at 6v to 12v in one volt steps, and measure its output volume for ten seconds at each step.
You might find that you still have adequate flow for your situation at a lower, cooler, voltage.
Could be. The way the voltage sags at the end of the cable with the blueretro connected suggests that someone skimped on copper in the wires.
If you can figure out a way to measure the voltage at the port with the cable attached and powering the blueretro, do that. If it is mostly the same whether the blueretro is connected or not, yep, it’s the cable.