Review on 💡 [2-Pack] Adjustable XL6009 DC-DC Buck Boost Converter for Automatic Wide Voltage Regulation: Convert DC 5-32 V to 1.25-35 V Efficiently with Voltage Module by Jordan Rini

I built myself a soundbar. Required 12 volts and 5 volts from an array of 4 lithium batteries so I use 2 of these regulators to generate the required voltages. Here's the catch. In addition to the DC voltage from the regulators, there is a lot of switching noise. This will eventually carry over to the audio output. Switching noises are unfortunately in the audio range of approx. 5-10 kHz. I'll probably have to put more effort into filtering the output of the regulators and may need to install EMI shielding around them. Very disappointed with this purchase as I made the board specifically to use these regulators.