Description
Product Overview
The FiiO K11 R2R is a compact desktop DAC and headphone amplifier featuring a full 24‑bit differential complementary R2R resistor ladder. Housed in a solid aluminum alloy case, it offers durability and a premium look. With 13 pins, it supports coaxial, optical, and RCA connections, delivering low‑noise, high‑resolution audio for headphones and speakers. Dimensions are 9.57 x 7.76 x 2.32 inches and it weighs just 2.09 lb.
Usage
Designed for home studios, gaming rigs, and media centers, the K11 connects easily to PCs, laptops, smartphones, and TVs. Whether you’re mixing tracks, enjoying movies, or gaming, its dual‑channel output provides clear sound in any setting. 
Why Choose Us
FiiO’s reputation for audio excellence ensures the K11 delivers reliable performance with a 4.6‑star rating from over 200 users. The combination of NOS and OS modes lets you choose pure sampling or oversampled playback, catering to audiophiles who demand flexibility. Quality components and rigorous testing guarantee long‑term stability.
Key Features
- Full 24‑bit differential complementary R2R DAC for ultra‑low distortion
- Three input options: coaxial, optical, and RCA for versatile connectivity
- Aluminum chassis provides sturdy, heat‑dissipating construction
- Standalone desktop design fits neatly on any workspace
- Dual modes (NOS and OS) let you tailor sound to your preference
FAQ
What devices can I connect to the K11?
The K11 works with computers, laptops, smartphones, tablets, TVs, and any source that offers coaxial, optical, or RCA outputs.
Do I need additional power supplies?
The unit includes an internal power supply and operates from a standard AC outlet; no external batteries are required.
Can I use the K11 with balanced headphones?
While the K11 provides unbalanced RCA outputs, you can use a balanced adapter cable to connect balanced headphones.
Is the K11 suitable for professional audio work?
Yes, its low‑noise R2R architecture and high‑resolution support make it a solid choice for mixing, mastering, and critical listening.
How does the NOS mode differ from OS mode?
NOS (Non‑Oversampling) preserves the original sample rate for a more authentic sound, whereas OS (Oversampling) reduces jitter and can improve clarity for certain recordings.





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