FIK11R2RB

K11R2R-B

FiiO

Get the most out of your audiophile headphones and audio content with the K11 R2R from FiiO, a desktop DAC and headphone amp with fully differential 24-bit R2R resistor arrays and up to 1300mW of output per channel into 32 ohms. Sporting up to 384 kHz upsampling via OS mode, you can experience a refined sound with any audio content.The FiiO K11 R2R supports 24-bit (32 bit with USB) / 384 kHz decoding for PCM files and up to DSD256 for compatible DSD files. The DAC features plenty of high-quality chips for maximizing sonic performance, including Ti OPA1642 and SGM8262 op-amps, an SA9312L USB controller, a CS43198 DAC chip, and the NJW1195A 4-channel volume controller for the main control knob. Three selectable gain levels and volume curves ensure optimal compatibility with any audio content. The unit sports a crystal-clear high-contrast LCD display for easy operation, as well as RGB logo lighting for a stylish look. Connections include optical TOSLINK and coaxial RCA digital inputs/outputs, RCA line outputs, USB-C for maximum digital audio quality, and separate balanced 4.4mm and unbalanced 1/4" headphone outs. The K11 R2R includes an external power adapter with power cable, a USB-C to USB-A data cable, and a 3.5mm to 1/4" TRS plug adapter.Fully Differential 24-Bit R2R DAC Resistor Arrays FiiO's newly self-developed four-channel fully differential 24-bit R2R DAC consists of 96 precision thin-film resistor arrays per channel, totaling 192 resistors with 0.1% tolerance and low temperature drift (30ppm). This configuration delivers a unique and charming sound.Double the Fun with Dual NOS/OS Modes NOS (non-oversampling) mode: maintains the original sampling rate for decoding, preserving an authentic sound and providing an organic and captivating musical experienceOS (oversampling) mode upsamples globally to a high sampling rate of 384 kHz, for superior audio performance and an even more refined and clear soundTrue 24-Bit Decoding Support for 24-bit / 384 kHz PCM and DSD256 decoding means the K11 R2R can easily handle high-precision audio signals and fully exhibit the details within, providing a audiophile-level listening experience.High-Quality Electronic Volume Control The NJW1195A is a four-channel electronic volume controller. This resistor ladder electronic potentiometer sports low distortion and noise, allowing for precise volume adjustment.3 Gain Levels and 3 Independent Volume Curves The three independent gain levels and volume curves allow the K11 R2R to provide better performance with various types of headphones. Whether you are using sensitive earphones or harder-to-drive over-ear headphones, you can find an ideal gain level and curve for an optimal listening experience.Specially Designed Audio Circuit The audio signal is transmitted via a USB interface processor to a digital audio bridge. After being processed by an FPGA, it is sent to the R2R DAC for 4-channel output after decoding. Then, it passes through two Ti OPA1642 op-amps for low-pass filtering and single-ended analog signal conversion.The output stage uses two SGM8262 op-amps for 4-way phase inversion and amplification, resulting in outputs of single-ended and balanced analog signals. The audio circuit features specially designed headphone protection circuity and a pop-noise elimination system.Specially Designed Power Supply The K11 R2R uses up to 17 low-noise LDO precision regulator ICs and 2 DC-DC converters, providing multichannel power supply of -9, 8, 7.5, 6, 5.4, 3.3, 1.8, and 1.2V. These are combined with an external custom 12V switching power supply to ensure the purity of the power being supplied to the DAC and to provide a solid foundation for stronger power output.High-Quality Beryl Solid Capacitors The capacitors' ultralow ESR, combined with excellent anti-interference characteristics, allow them to provide a stable and clean power supply and thus achieve high-quality sound.Hear Every Last Detail Under a 32-ohm load, the K11 R2R is capable of pushing