Topping DX3 Pro vs E30

Topping DX3 Pro LDAC Headphone Amplifier DSD512 USB Bluetooth DAC

Specifications
Size: 12*16.5*4cm
Weight: 400g
DC power: DC15V/1A
Color: Silver/Black
Line out: RCA
HP output:3.5mm

DX3 Pro Output: DAC(@ USB 96k Input)
THD+N @ A-weighting :<0.0004%@ 1kHz; <0.0005%@ 2-20kHz
SNR@ A- weighting : >120dB@1kHz
Frequency Response : 20HZ-20KHZ(±0. 35db）
Output Level : 2uVrms @ 0dBFS
Noise: <2uVrms
Channel Crosstalk : -1350B1kHZ
Channel Balance : 0.1dB
Output Impedance : <100Ω

DX3 Pro Output: headphone(@ USB 96k Input)
THD+N @ A-weighting:
<0.001%@ 1khz Output=77mW(32Ω)
<0.002% @ 20-20 KHZ Output=77mW(32Ω)
<0.0006%@1 KHZ Output=13.4mW(300Ω)
<0.0006%@20-20 KHZ Output=13.4mW(300Ω)

SNR@ A- weighting : >120dB@1kHz
Frequency Response : 20HZ-20KHZ(±0. 2db）
Output Level : 5.8Vpp@G=0dB ; 17.3Vpp@G=9dB
Noise : <3 uvrms@G=0dB ; <7 uvrms@G=9dB
Channel Crosstalk : -70db @1KHZ
Channel Balance : 0.5dB
Output Impedance : <10Ω
Output Power : 700mW X 2 @ 32 Ω THD+N<1%
125mW X 2 @ 300Ω THD+N<1%
Adapter Impedance : 16-300 Ω

USB IN: 44.1kHz-768 kHz/16bit-24 bit
DSD64-DSD512(Native) ; DSD64-DSD512(DOP)
OPT/ COAX IN: 44.1kHz-192 kHz/16bit-24 bit
BT IN: AAC/SBC/APTX/APTX-LL/APTX-HD/LDAC