Hello there! I've been messing around with an audio amp I brought from Sparkfun. Right now, I'm powering the amp using my 150W power supply (30V and 5A). It works great with one JENSEN JRX235 speaker, but when I add another one, I notice thumping sounds coming from them. At first, I thought it could be power supply capacitance issue, so I added a 2200uF cap in parallel with the 1000uf Capacitor. However, the thumping from the speakers was still prevalent. I even added 470uF in series with each speaker.
I took a couple screen shots to help out. Yellow is the input going into the speaker (which you can see is pretty bad), blue is the voltage on the power supply rail.
Sorry for the question, but I'm new to audio electronics.
I took a couple screen shots to help out. Yellow is the input going into the speaker (which you can see is pretty bad), blue is the voltage on the power supply rail.
Sorry for the question, but I'm new to audio electronics.
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