The FiiO DM15 R2R is a portable CD player built around a discrete R2R ladder DAC, which gives discs a warmer, more textured tone than the delta-sigma chips in most CD players. It runs about seven hours on a 4700mAh high-voltage lithium battery, charges in roughly two hours over PD3.0, and works as a USB DAC, Bluetooth transmitter, or optical/coaxial source as well as a plain disc player. Single-ended and fully balanced outputs let it drive headphones directly or feed a desktop amp. It suits listeners who still play CDs and want a warm, analog-leaning sound they can carry room to room; rivals like portable players from Shanling and Moondrop are smaller or cheaper but rarely offer a balanced output and R2R conversion together.
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Owners rate it highly, praising the warm R2R sound and the flexibility of using it as a DAC and transport as well as a CD player. The main complaints are its size and weight for a portable and the battery life.
The FiiO DM15 R2R is a compact, battery-powered CD player with FiiO's self-developed R2R DAC. The DAC uses a resistor ladder instead of a conventional delta-sigma design. The body is aluminum alloy, and a transparent tempered glass window shows the disc.
It works as a portable CD player, a USB DAC, a Bluetooth transmitter, or an optical or coaxial digital source. For headphones it has 3.5mm single-ended and 4.4mm balanced outputs, each with its own amplification. It also has 3.5mm and 4.4mm line outputs for amplifiers or active speakers. Bluetooth transmit supports SBC, aptX, aptX-HD, aptX-LL and aptX-Adaptive.
A 4700mAh, 3.85V lithium battery gives about 7 hours of playback and charges in about 2 hours with PD3.0 fast charging. An ESP anti-vibration switch helps reduce skipping when the player is moved. An infrared remote is included for basic transport control, such as skipping, pausing, stopping and changing output modes.
