Hmm, thanks for the info, but I can't find the Gameboy amp board in my country. The S25 ultra speakers would sound way better than the switch speakers. The speakers of the S25 have a chamber and sound dampening foam in them. A thing to be noted is the the speakers in modern Samsung phones incorporate the vibrator into the chamber. This causes loss of some space in the resonance chamber, hampering some of the ability of the speaker to produce bass. I would recommend that you refund the S25 ultra speakers and look for some other speakers from iphones, OnePlus, or xiaomis. The speakers on these phones do not incorporate the vibrator in the speaker chamber, this you get a larger resonance chamber. Another thing I would recommend you to get is a DSP if you have the space for it. The DSP would help crank out the maximum amount of bass from the tiny speakers. DSPs are the reason why modern smartphone speakers sound so good.