I bought a lightning to 3.5mm adapter to use my sennheisers in my iPhone 12 but they sound so much better plugged straight into my old Samsung s9. I’m no expert so I don’t know how to explain the difference but sounds so much more crisp and can decipher all the different sounds on Samsung. Can I make them sound better through my iPhone?
Each audio capable device has its own Digital to Analog chip to convert digital audio signals to analog signals that your headphones need. Each DAC chip has its own unique sound signature hence the change in sounds quality