General Specifications
Name/Model WARMER R2R Hardware solution Master control: GD32F303RET6, DAC: FIIO proprietary R2R DAC, USB decoding: SA9312L, AMP: OPA1642AIDR*2+E88CC*4
Working mode USB DAC mode/Coaxial decoding mode/Optical decoding mode Color Black/Silver
Weight About 2865g Dimensions About 223.5x213x66.8mm (incl. feet)
Drive-free mode (switch mode) Supported Display Mechanical VU meter
Oversampling setting OS/NOS Firmware upgrade Supports USB upgrading
Maximum supported sampling rate USB decoding: 384kHz/32bit; DSD256 Volume control type No volume control
Coaxial decoding: 192kHz/24bit FiiO Control N/A
Optical decoding: 96kHz/24bit 　 　
Buttons and Ports
Physical button Power button Knob Input selection knob
Toggle switch UAC1.0/2.0 switch*1+OS/NOS switch*1 USB port Type-C USB*1 (data transmission)
Digital coaxial input port RCA port Digital optical input port Optical port
Single-ended line output port RCA port*2 Balanced line output port XLR3 balanced port*2
Power Supply Parameters
Power supply AC 220-240V~50/60Hz; AC 100-120V~50/60Hz; (Two power supply models in total, please purchase according to the local voltage level) Battery capacity No battery
Audio Parameters
Performance and parameters of single-ended line output (RCA out, USB DAC/Coaxial decoding/Optical decoding mode, OS mode)
THD+N About 0.052% (1kHz/-7dB@10KΩ) SNR ≥112dB (A-weighted)
Crosstalk ≥96dB Noise floor ＜4.5uV (A-weighted)
Frequency response 20Hz~20kHz: attenuation＜0.6dB Dynamic range ≥98dB
20Hz~45kHz: attenuation＜2.4dB Line output level 1.8Vrms (1kHz@10kΩ)
Performance and parameters of balanced line output (XLR3 out, USB DAC/Coaxial decoding/Optical decoding mode, OS mode)
THD+N About0.053% (1kHz/-7dB@10KΩ) SNR ≥114dB (A-weighted)
Crosstalk ≥104dB Noise floor ＜7uV (A-weighted)
Frequency response 20Hz~20kHz: attenuation＜1.5dB Dynamic range ≥105dB
20Hz~45kHz: attenuation＜2.4dB Line output level 3.3Vrms (1kHz@10kΩ)

LO 10KΩ

BAL LO 10KΩ

Test conditions: -5dB sinusoidal signal, 20Hz-20kHz,

RCA line output (10kΩ load)

Test conditions: -5dB sinusoidal signal, 20Hz-80kHz, RCA line output (10kΩ load)

Test conditions: -5dB sinusoidal signal, 20Hz-20kHz, XLR3 balanced line output (10kΩ load)

Test conditions: -5dB sinusoidal signal, 20Hz-20kHz, XLR3 balanced line output (10kΩ load)

Test conditions: -7dB sinusoidal signal, RCA line output (10kΩ load)

Test conditions: -5dB sinusoidal signal, 20Hz-20kHz, XLR3 balanced line output (10kΩ load)