Android audio player combines high fidelity and driving power (e.g. driving full-size over-ear headphones) of traditional DAPs with usability and connectivity (e.g. cloud music) of Android in one package. Modular amplifier design allows using different amplifier modules tailored for different types of headphones in unibody package without unwieldy interconnects. Industry-first *convolution* software reinvents equalizer, combines push-button simplicity with incredible customizability (user defines 8000+ EQ bands+phase correction). Result is DAP that can fully adapt to a user’s operational and sound quality needs, both in hardware and software.