Product description
PC PeripheralsHeadsets & AudioExternal sound cards from FIIO
K11 R2R Headphone Amplifier is a DAC/AMP from FIIO that offers advanced audio processing with a self-developed, four-channel fully differential 24-bit R2R DAC. This DAC uses dual 48-precision thin-film resistor arrays per channel, resulting in a total of 192 resistors with 0.1% tolerance and minimal temperature drift to ensure an unparalleled sound signature. The goal of the product is to provide a superior listening experience for headphone users.The device is designed to offer excellent noise performance thanks to the fully differential architecture, which reduces unwanted FFT harmonics compared to conventional designs. It also features dual NOS (Non-Oversampling) and OS (Oversampling) modes, allowing listeners to choose between authentic, organic sound and high-resolution audio with upsampling to 384kHz. K11 RAR supports PCM 384kHz/24bit and DSD256 decoding, enabling it to handle high-precision audio signals with high integrity.
Summary
- 24-bit R2R DAC
- 192 resistors with 0.1% tolerance
- Headphone users
- Fully differential architecture
- Dual NOS and OS modes
Article number:
Our article number: 36765
Manuf. article number: K11-R2R
Brand
FiiO is a global audio technology brand founded in 2007, specializing in high-resolution portable music products and HiFi accessories. The company develops, manufactures, and sells products such as digital music players, portable headphone amplifiers, DAC units, and headphones for users who value high sound quality and elegant design.
The brand name FiiO reflects the company’s philosophy: “Fi” stands for fidelity from HiFi, while “iO” represents the ones and zeros of the digital world. Together, they symbolize the ambition to combine authentic sound reproduction with modern digital convenience. Through strict quality management according to ISO9001 standards, FiiO places strong emphasis on product quality, technical precision, and customer satisfaction.
FiiO has gained significant recognition among audiophiles worldwide, with several products achieving record sales within their categories and receiving international awards such as the iF Design Award, Red Dot Award, EISA Award, and VGP Award. With a focus on innovation, quality, and service, the company strives to deliver stylish HiFi products that strengthen the reputation of Chinese audio technology while offering high performance at competitive prices.
Specifications
Audio output
| USB-C (Data), Optisk, Koaxial | |
| Obalanserad (PO): <1 Ω, Balanserad (BAL): <1.5 Ω | |
| ≥115dB (A-viktad) | |
| THD+N: ≈0.025% |
Properties
| FiiO-utvecklad R2R DAC (Full differential 24-bitars stege) | |
| PCM 32bit/384kHz, DSD256 (via USB | |
| Balanserad (4.4mm): ≥1300mW @ 32 Ω | |
| Inbyggd hörlursförstärkare (Använder SGM8262 op-amps) | |
| Hörlursutgångar: 4.4mm Balanserad, 6.35mm Obalanserad. Linjeutgångar: RCA Line Out, Koaxial utgång (Coaxial Out). | |
| Colour | Black |
Size & weight
| Width | 14,7 cm |
| Depth | 13,3 cm |
| Height | 3,23 cm |
| Weight | 420 g |
Warranty
| Manufacturer's warranty | 1 year warranty |