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FiiO K5Pro ESS DAC/Headphone Amp High Res - $120
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The FiiO K5 Pro ESS Desktop DAC/Headphone Amplifier is an elegant compact preamplifier with a built-in DAC and dedicated Headphone Amplifier which has a choice of three inputs (S/PDIF – Optical or Coaxal, USB, or Analog – RCA), three user switchable gain levels (Low 0dB, Medium +6dB, and High +10dB), and an external power supply for improved isolation.
The list of features is impressive for a unit of this price point:
ESS ES9038Q2M DAC Chip; 50% lower Distortion, 6dB greater Channel Separation, and 3dB of increased Dynamic Range
XMOS XUF208 USB decoding Chip; equipped with Clock Matching Management System allowing up to 32-bit/768kHz & DSD512 decoding
4 Stage Analog amplifier section; Second-Order LPF (Low-Pass Filter), Analog Volume Control (provides greater dynamic range than digital volume control), Voltage Amplification, Current Drive
Carefully-tuned Feedforward Amplifier Circuit Design; increases power output of TPA6120 op-amp by over 60%
Precise Volume Control Circuit; reconstructs ADC curve for extremely fine increment attenuation without undesirable noise nor channel imbalance
3 Gain User Selectable Levels; Low 0dB, Medium +6dB, and High +10dB
Support for 32-bit/768kHz & DSD512
Outboard DC15V Power Supply; Allows for better isolation and is supplemented by Internal Secondary Power Supply that suppresses power supply ripple and independently supplies power to Analog and Digital circuits
RGB Indicator Lighting
1.5 Watts of Power @ 32Ω
Coax, Optical, USB, and RCA Line Inputs
6.35mm TRS Headphone Output
RCA Line Outputs
Hi-Res Audio Certification