Hey there!

I finally decided to join this community!
We are setting up a cheap and simple sound system and it’s always a good idea to add a RPi !

I just need some answers to my hardware related questions before going on, I am looking for the right sub.

Thx all

EDIT: I try posting my questions here since I can’t find a proper sub for technical questions.
We have recovered 4x bookshelf speakers (8ohm, 30w RMS) and I thought we could get a stereo amplifier and wire 2 speakers in parallel for each line out. Given that I am looking for a 4ohm AMP, what wattage should I choose? I can find many amplifiers off Aliexpress rated at 2x 50w (RMS I suppose) and that would give each speaker 25w of power, am I correct?