GRACE M900 PORTABLE HEADPHONE AMPLIFIER/DAC

About this deal

The Grace Design m900 is a portable, desktop-friendly headphone amplifier, DAC, and preamp combo aimed at audio professionals and enthusiasts who want transparent, high-fidelity playback from USB, S/PDIF, or TOSLINK sources. It suits small DAW studio setups, portable laptop editing or mixing rigs, or pure listening enjoyment, delivering the same DAC quality as Grace Design's large monitor controllers in a compact, rugged unit. The DAC is built around an AKM 4490 chip with 32-bit processing, supporting sample rates up to 384kHz PCM or 256x DSD. The asynchronous USB interface lets the m900 act as clock master, making the system immune to USB bus jitter. An intelligent dual-mode power supply lets the unit run in low-power mode from a single USB connection, or switch automatically to high-power mode when the included 2A supply is connected, driving even the most demanding headphones. A crossfeed circuit simulates an acoustic listening environment through headphones, and four DAC filter settings allow playback to be tailored to personal preference. This listing is described as opened but never used, making it a solid opportunity to pick up a well-regarded pro-audio unit at a reduced price.