lenovo do need to work on their speaker game - on thinkpads speakers are weak. I'm not sure of parts cost but given thinkpad's target segment even an extra $50 won't hurt for macbook level quality speakers
you might be right. but my take is you source these parts - hell they can even source them from the apple parts bin - like Nintendo sources parts for their hardware. surely i'm not asking them to invent speakers from scratch just to get better ones.