How tf speaker of iphone 16 is sooo good

My friend got an iphone 16 and I was amazed with the audio quality of it. It was playing songs as if it was a spatial audio, every single note of guitar was heard very clear and distinct. I cannot explain how good it was. Never saw such quality in any iqoo,realme,vivo etc.They were definitely 'loud' but the quality was always rough.But in iphone It was really really astonishing as If I was there in recording room for the song.Have you heard it? Also,if I wish to get such quality what are other options in bluetooth speaker or android phones