I am doing personal project - portable MP3 player. Goals are sound quality + power efficiency. Price is not limited to a reasonable amount (100-200$ in parts is ok)
Will single-chip DAC+D-class amplifiers give me best possible power efficiency while having excellent audio quality? I've seen 24-bit ones but a little overpowered (like 1.5W per channel). This looks very juicy - No need to design analog part, all sensetive parts are inside the chip. Are there any pitfalls with this approach or with D-class amplifiers with headphones in general?
I afraid that classic op-amp based or AB-class amplifiers will eat too much power + I will need careful design of analog part after DAC.
For example: http://www.cirrus.com/en/products/cs43l22.html Separate output for headphones scares me.
- 32-50 Ohm headphones support @100mW
- LiIon power supply, the more play hours I get the better :-)
- Maximum quality (as long as I can hear the difference)
- I have 24-bit decoder output, so going down to 16 is possible to not that fun (extra analog filtering and noise shaping).