When you want to hear your music exactly as it's recorded, listen on the Grace Design m920. It's ready to play back from a wide range of input sources, and supports up to 384kHz/32 bit PCM audio - that's high quality sound. Even better, it's ready to play back DSD64 and DSD128 formats, which sound even better. It's an awesome amp for headphones or speakers, and there's even a crossfeed function that simulates the acoustic effect of speakers when listening on headphones. You'll hear every detail with the Grace Design m920 headphone amp.