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RME ADI-2 DAC vs. Fiio K3 + 3
Tone/balance controller
Bass control, Treble Control, Balance Control
Bass control
Wireless connection
None
None
Bluetooth
None
Bluetooth
High resolution audio formats
DSD
DSD
DSD
DSD
Analogue 3.5mm input (Aux)
0 ​
0 ​
0 ​
Analogue RCA stereo inputs
0 pair
0 pair
0 pair
Analogue RCA stereo outputs
1 pair
1 pair
0 pair
0 pair
Balanced input (analogue) XLR
0 pair
0 pair
0 pair
Balanced input digital XLR (AES / EBU)
0 ​
0 ​
0 ​
Balanced output (analogue) XLR
1 pair
1 pair
0 pair
0 pair
Balanced output 4.4mm Pentaconn
Balanced output digital XLR (AES / EBU)
0 ​
0 ​
0 ​
Digital coaxial input (S/PDIF)
1 ​
2 ​
1 ​
0 ​
Digital coaxial output (S/PDIF)
1 ​
1 ​
0 ​
0 ​
Digital optical input (S/PDIF)
1 ​
2 ​
1 ​
0 ​
Digital optical output (S/PDIF)
1 ​
1 ​
0 ​
0 ​
Firewire
No
No
No
No
No
Headphone output
Yes
Yes
Yes
Yes
Yes
Headphone output (3.5 mm)
1 ​
0 ​
2 ​
1 ​
Headphone output (Jack plug 6.3 mm/1/4
1 ​
1 ​
0 ​
0 ​
Output power per channel
1500 mW
720 mW
240 mW
Pre output (full range)
No
Tele plug 6.3mm input
0 ​
0 ​
USB
Yes
Yes
Yes
Yes
Yes
Type of USB connector
USB (Type C)
USB (Type C)
USB powered (only via USB)
No
Yes
Yes
Available colours
Black
Black, Silver, Grey
Black, White, Silver
Black, Blue
Dimensions (WxHxD)
Depth
150 mm
58 mm
191 mm
60 mm
11.1 mm
Height
52 mm
52 mm
22 mm
72 mm
Width
215 mm
70 mm
215 mm
82 mm
32 mm
Product weight
1 kg
0.82 kg
1.2 kg
0.18 kg
0.04 kg
Features
Suitable for PA use/Rack mount, Remote control, Display, Volume control
Volume control
Volume control
Display, Volume control
Display, Volume control
Built-in D/A converter
Yes
Yes
Yes
Yes
Yes
D/A audio
24 bit / 384 kHz
32 bit / 768 kHz
32 bit / 384 kHz
DAC (audio chip)
AKM AK4452
Wolfson WM8740
Can be used as a preamplifier (Preamp)
Yes
Yes
Yes
Release year
2018
2011
2015
2019
Battery operated
No
No
No
Yes
Yes
Separate power connector (mains)
Via AC adapter
Via AC adapter
No
AC/DC-Voltage (5v/12v/18v/24v/36v)
9.5 - 15 V
12 V