X5 III_comparisons

X5 III

Name/Model No.	X7 (FX7121)	X5 3rd gen (FX5321)	X5 2nd gen (FX5221)
General Specifications
Color	Titanium	Titanium/Black/Red	Titanium/Black/Gold
Dimensions	130 mm× 64 mm× 16.6 mm	114.2 mm× 66.2 mm× 14.8 mm	109 mm× 63.5 mm× 15.3 mm
Weight	220 g	186 g	165 g
Screen Display	3.97 inches, 16.7 million colors, IPS TFT touch screen, Pixle density: 233 ppi, Resolution: 480x800	3.97 inches, 16.7 million colors, IPS TFT touch screen, Pixle density: 233 ppi, Resolution: 480x800	2.4 inches, 262,144 color HD IPS screen with 400x360 pixels
Line Out(LO)	Standard 3.5mm Port (Shared line out /S/PDIF coaxial out)	Standard 3.5mm Port (Shared line out /S/PDIF coaxial out)	Standard 3.5mm Port (Shared line out /S/PDIF coaxial out)
Digital Out (Coaxial)	Standard 3.5mm Port (Shared line out /S/PDIF coaxial out)	Standard 3.5mm Port (Shared line out /S/PDIF coaxial out)	Standard 3.5mm Port (Shared line out /S/PDIF coaxial out)
USB DAC	Supporting up to 384kHz/32bit	Supporting up to 192kHz/24bit	Supporting up to 192kHz/24bit
Headphone Output	Standard 3.5mm Headphone Port	Standard 3.5mm Headphone Port	Standard 3.5mm Headphone Port
Drive Ability	16~300 Ω (it may change with different amp modules)	16~150 Ω	16~150 Ω
Volume Control	120 steps digital potentiometer	120 steps digital potentiometer	120 steps digital potentiometer
Treble Boost	N/A	N/A	N/A
Bass Boost	N/A	N/A	N/A
Equalizer	10-band EQ (±6dB), 9 presets+custom preset, ViPER Effect(Android 5.1)	10-band EQ (±6dB), 9 presets+ custom preset, ViPER Effect	10-band EQ (±6dB), 9 presets+ custom preset
Balance Control	10 dB	10 dB	10 dB
Gain Control	L/H	L/H	L/H
Internal Memory	32GB (about 27GB available to user)	32GB (about 26GB available to user)	N/A
Expansion Memory (Maximum)	256GB	512GB (256GBx2)	512GB (256GBx2)
Chips used	SoC: RK3188, DAC: ES9018S, LPF: OPA1612 , OP: (it may change with different amp modules)	SoC: RK3188, DAC: AK4490x2, LPF: OPA1642x2, OP: customized OPA426x2	SoC: JZ4760B, DAC: PCM1792A, LPF: OPA1612, OP: OPA1612+BUF634
Others
Input Methods	Physical buttons + Touch screen	Physical buttons + Touch screen + Side volume wheel	Physical buttons + Mechanical wheel
Buttons Mapping	Yes	N/A	N/A
Font Size Adjustment	Yes	Yes	N/A
In-line Control	Supports CTIA standards headphones (Play/Pause, Previous/Next)	Supports most headphones on the market (Play/Pause, Previous/Next, Volume Up/Down)	Supports CTIA standards headphones (Play/Pause, Previous/Next)
In-line Control	Does not support in-line volume control	Does not support in-line volume control from Apple Earpods	Does not support in-line volume control
WiFi	2.4GHz IEEE802.11 b/g/n standards	2.4GHz IEEE802.11 b/g/n standards	N/A
Bluetooth	Supports Bluetooth v4.0 and aptX (with the latest firmware)	Supports Bluetooth v4.0 and aptX	N/A
Firmware Upgrade	Supports OTA upgrade and manual upgrade via internal memory or Micro SD card	Supports OTA upgrade and manual upgrade via internal memory or Micro SD card	Supports manual upgrade via Micro SD card
Partial Performance Parameters for Line Output
THD+N	＜0.0007% (1 kHz/10kΩ)	＜0.0009% (1 kHz/10kΩ)	<0.001% (1 kHz/10kΩ)
Frequency Response	10 Hz~62 kHz (-3dB)	5 Hz~55kHz (-3dB)	10 Hz~65 kHz (-3dB)
Crosstalk	＞100 dB (10 KΩ/1 kHz)	＞98 dB (10 KΩ/1 kHz)	＞115 dB (10 KΩ/1 kHz)
SNR	≥115 dB (A-weighted)	≥120 dB (A-weighted)	≥114 dB (A-weighted)
Dynamic Range	>115 dB	＞117 dB	＞110 dB
Line Output Level	>1.4 Vrms (10 KΩ/1 kHz)	＞1.8Vrms	1.53 Vrms (10 KΩ/1 kHz)
Partial Performance Parameters for Headphone Output (The X7 in comparison is using AM3 as example)
3.5mm headphone output
Output Power 1	＞250mW (16Ω / THD+N＜1%)	≥480 mW (16Ω / THD+N＜1%)	>436 mW (16Ω/THD+N＜1%)
Output Power 2	＞190mW (32Ω / THD+N＜1%)	≥250 mW (32Ω /THD+N＜1%)	>245 mW (32Ω//THD+N＜1%)
Output Power 3	＞25mW (300Ω / THD+N＜1%)	≥28 mW (300Ω / THD+N＜1%)	>27 mW (300Ω/THD+N＜1%)
Frequency Response	5Hz~83kHz (-3dB)	5 Hz~55 kHz (-3dB)	10 Hz~65 kHz (-3dB)
SNR	≥115dB (A-weighted)	≥115 dB (A-weighted)	≥117 dB (A-weighted)
Output Impedance	＜0.3Ω (32Ω loaded)	＜1Ω (32Ω loaded)	＜0.2Ω (32Ω loaded)
Crosstalk	72dB (32Ω/1kHz)	＞73 dB (32KΩ/1 kHz)	＞75 dB (32KΩ/1 kHz)
THD+N	＜0.001% (32Ω/1kHz)	＜0.003% (32 KΩ/1 kHz)	＜0.001% (32 KΩ/1 kHz)
Max. Output Voltage	＞7Vp-p	＞8 Vp-p	＞8.2 Vp-p
Max. Output Current	＞80mA (for reference)	>250mA (for reference)	＞250 mA (for reference)
Drive Ability	16~300 Ω	16~150 Ω	16~150 Ω
2.5mm TRRS Balanced Output
Output Power 1	＞420mW (16Ω / THD+N＜1%)	≥400 mW (16Ω / THD+N＜1%)	N/A
Output Power 2	＞540mW (32Ω / THD+N＜1%)	≥240 mW (32Ω /THD+N＜1%)	N/A
Output Power 3	＞70mW (300Ω / THD+N＜1%)	≥26 mW (300Ω / THD+N＜1%)	N/A
Frequency Response	5Hz~83kHz(-3dB)	5 Hz~55 kHz(-3dB)	N/A
SNR	≥115dB (A-weighted)	≥111 dB (A-weighted)	N/A
Output Impedance	＜0.3Ω (32Ω loaded)	＜3Ω (32Ω loaded)	N/A
Crosstalk	＞100dB (32Ω/1kHz)	≥98 dB (32Ω/1kHz)	N/A
THD+N	＜0.0008% (32Ω/1kHz)	＜0.003% (32 KΩ/1 kHz)	N/A
Max. Output Voltage	＞11 Vp-p	＞7.5 Vp-p	N/A
Max. Output Current	＞160mA (for reference)	>250mA (for reference)	N/A
Drive Ability	16~150 Ω	16~150 Ω	N/A
Power and Battery
Power	DC5V 2A recommended	DC 12/1.5A, 9V/2A, 5V/2A recommended	DC5V 2A recommended
Quick Charge	N/A	Yes	N/A
Charge Display	via LCD display and pulse LED	via LCD display	Red light indicates , green light turns on after fully charged
Battery Display	Yes (battery level in percentage)	Yes (battery level in percentage)	Yes
Battery Capacity	3500 mAh	3400 mAh	3300 mAh
Battery Life	＞6 h (AM3, 3.5mm headphone output)	＞10 h (3.5mm headphone output)	＞10 h (32Ω, normal volume with LCD off)_
Battery Life	> 6 h (AM3, 2.5mm TRRS balanced output)	> 8 h (2.5mm TRRS balanced output)	＞10 h (32Ω, normal volume with LCD off)_
Charging Time	＜4.5h (DC5V 2A recommended)	＜2h (DC12V/1.5A quich charge)	＜4 h (DC5V 2A recommended)
Charging Time	＜4.5h (DC5V 2A recommended)	＜3h (DC5V/2A normal charge)	＜4 h (DC5V 2A recommended)
Audio Formats Supported
Lossless:	DSD:DSD64/128 (".iso", ".dsf", ".dff")	DSD:DSD64/128 (".iso", ".dsf", ".dff")	DSD: DSD64, DSD128 (".iso", ".dsf", ".dff");
	DXD:352.8K	DXD:352.8K	APE(Fast): 192 kHz/24 bit;
	APE FAST/High/Normal:384kHz/24bit(MAX)	APE FAST/High/Normal:384kHz/24bit(MAX)	APE(Normal): 96 kHz/24 bit;
	APE Extra High:192kHz/24bit(MAX)	APE Extra High:192kHz/24bit(MAX)	APE (High): 96 kHz/24 bit;
	APE Insane:48kHz/24bit(MAX)	APE Insane:48kHz/24bit(MAX)	AIFF:192kHz/24bit;
	Apple Lossless:384kHz/24bit(MAX)	Apple Lossless:384kHz/24bit(MAX)	FLAC: 192 kHz/24 bit;
	AIFF:384kHz/24bit(MAX)	AIFF:384kHz/24bit(MAX)	WAV: 192 kHz/64 bit;
	FLAC:384kHz/24bit(MAX)	FLAC:384kHz/24bit(MAX)	WMA Lossless: 96 kHz/24 bit;
	WAV:384kHz/64bit(MAX)	WAV:384kHz/32bit(MAX)	Apple Lossless: 192 kHz/24 bit;
	WMA LOSSLESS:96kHz/24bit(MAX)	WMA LOSSLESS: 96kHz/24bit(MAX)
Lossy Compression:	MP3、WMA、OGG...	MP3、WMA、OGG...	MP3、WMA、OGG...

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X7 Mark II FAQ