The DISC Nano is a pocket-sized portable CD player from Fosi Audio, built around a Cirrus Logic CS43198 DAC. It plays discs through 3.5mm, 4.4mm balanced and optical outputs, or streams over Bluetooth, and its 800mAh battery charges over USB-C. The half-exposed disc chamber and magnetic back make it a showpiece as much as a player. It suits people who still own CDs and want a small, good-sounding transport, though the open disc bay and small controls are trade-offs against a sealed, full-size player.
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Ratings are strong at 4.4 out of 5 from 27 buyers, who mostly praise the tiny size and the sound from the DAC and balanced output. Complaints center on the exposed disc chamber and the fiddly controls on such a small body.
The Fosi Audio DISC Nano is a portable CD player that measures 102mm across. It has a built-in 800mAh battery that charges over USB-C, so it can be used away from a wall outlet. The disc chamber is half-exposed, so the disc can be seen spinning, and a snap-lock disc mount holds it in place.
The back has a MagSafe-compatible design for snapping onto magnetic mounts, a fridge, a car or a desk stand. It is for magnetic mounting only and does not provide wireless charging. Audio can be sent to headphones or speakers over Bluetooth, or played in wired mode for zero-latency listening.
A Cirrus Logic CS43198 DAC handles decoding, with 90mW of output power. Outputs include a 3.5mm single-ended jack, a balanced 4.4mm jack and a 3.5mm optical digital output, which lets the player act as a transport for a desktop DAC. A customized servo, an enhanced error-correction algorithm and ESP electronic anti-shock keep playback stable during movement and help with scratched discs.
