Model Name	Q1	KUNLUN-E18	ALPEN 2-E17K	ANDES-E07K
General Specifications
Color Available	Black	Black	Black	Black
Dimensions	97mm x 56mm x 13.1mm	130 mm×66.2 mm×14.6 mm	104.1 mm×62.2 mm×12.8 mm	96 mm×55 mm×15.2 mm
Weight	100 g	162 g	110 g	102 g
Displayer	N/A	N/A	OLED 128×64/1.3 inch	OLED 128×64
Analog Audio input	Micro USB/3.5 mm Jack	3.5 mm stereo Jack	3.5 mm stereo Jack	3.5 mm stereo Jack
Digital Audio input	N/A	N/A	Micro USB/Coaxial/3.5 mm jack（COAXIAL adapter attached）	USB
Headphone output	3.5 mm stereo Jack	3.5 mm stereo Jack	3.5 mm stereo Jack	2×3.5 mm stereo Jack
Line Output	3.5 mm stereo Jack	3.5 mm stereo Jack	Dock(Micro USB)/3.5 mm Line Out port	18 Pin Dock
Headphone Impedance Range	16~150 Ω	16~150 Ω	16~150 Ω	16~150 Ω
Volume Control	TOCOS  Potentiometer	ALPS Potentiometer	Digital Volume Control (0-60)	digital volume control (0-60)
Bass Adjust	0/5dB	N/A	±10 dB	±10 dB
Treble Adjust	N/A	0 dB/6 dB	±10 dB	±10 dB
Balance Adjust	/	5 dB	5 dB
GAIN Control	-7dB/4.5dB (AUX IN) -3.5dB/8dB (USB IN)	0/6 dB	0/6/12 dB	0/6/12 dB
Line Out Bypass	Yes	YES	YES	YES
Audio Performance (DAC Section)
USB Sample Rate Support	32/44.1/48/96 kHz (16/24 bit)	32/44.1/48/96 kHz (16/24 bit)	32/44.1/48/96 kHz (16/32 bit) DSD 2.8 MHz Supported	32/44.1/48/96 kHz (16/24 bit)
SPDIF Sample Rate Support	/	/	32/44.1/48/96/192 kHz (16/24 bit)	N/A
THD+N	＜0.0045% (10 kΩ/1 kHz) (LO)	＜0.003% (1 kHz)	＜0.003% (1 kHz)	＜0.01% (1 kHz)
SNR	≥107dB	＞106 dB	＞105 dB	＞104 dB
Dynamic Range	＞95 dB	＞100 dB	＞102 dB	＞104 dB
Line Out Level	＞1.48 Vrms	＞1.3 Vrms	＞1.5 Vrms	＞1.1 Vrms
Audio Performance
Output Power1	＞190 mW (32 Ω/THD+N＜1%)	＞300 mW (32 Ω/THD+N＜1%)	>200 mW (32 Ω/THD<1%)	＞220 mW (32 Ω/THD+N＜1%)
Output Power2	＞75 mW (150 Ω/THD+N＜1%)	＞400 mW (32 Ω/THD+N＜1%)		＞250 mW (16 Ω/THD+N＜1%)
Frequency Response	20 Hz~20 kHz	20 Hz~20 kHz	20 Hz~20 kHz	20 Hz~20 kHz
SNR	≥110dB (AUX IN)	＞110 dB (AUX IN)	>106 dB(AUX IN Gain 12 dB) >113 dB(AUX IN Gain 0 dB/6dB)	＞108 dB (AUX IN)
Output impedance	＜0.3 Ω	＜0.3 Ω	＜1.1 Ω
Crosstalk	≥75dB (1 kHz)	＞72 dB (1 kHz)	＞75 dB (1 kHz)	＞71 dB (1 kHz)
THD+N	＜0.005% (32 Ω/1 kHz)	＜0.005% (32 Ω/1 kHz) (PO)	＜0.003% (1 kHz)	＜0.005% (1 kHz)＜0.3 Ω
MAX Gain	/	/	＞12 dB	＞12 dB
Peak Output Voltage	7.2 Vp-p	8 Vp-p	＞7.8 Vp-p	＞7 Vp-p
MAX output Current	＞75 mA	＞94 mA	＞115 mA	＞75 mA
MAX input Level	4.3 Vrms	1.5 Vrms	4 Vrms	4.5 Vrms
Power and Battery
Power/Charger	DC5V 1A（recommended ）	Recommend DC5V 2A	Recommended DC5V 1A	Recommend DC5V 1A
Charing Display	YES	YES	YES	YES
Battery Level display	N/A	N/A	YES	YES
Capacity	1400 mAh	3500 mAh	1500 mAh	1200 mAh
Battery Life	＞30 h	＞25 h  (AUX IN) ＞12 h (USB IN)	＞15 h	＞20 h
Charge Time	≤4 h	4 h	≤ 220 min	＜3 h