DAC and Headphone Amplifier QX11

QX11

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General Specifications
Name/Model	QX11	Hardware solution	DAC: ES9069Q2, USB DAC: SPV5068, Headphone amp: OPA16922, OPA1622*4
Color	Dark green	Weight	About 36g
Dimensions	About 64x28.8x13mm	Volume control	Physical knob control
Display	1.14-inch LCD display (135*240)	Recommended headphone impedance	PO: 8~350Ω
Gain	H/L	Recommended headphone impedance	BAL: 8~350Ω
Buttons and Ports
Buttons	Custom button1, Encoder knob (with confirm button)1	USB	Type-C USB2.0 (charging/data transfer/OTA updates)+Type-C USB POWER IN (orange, power supply)
Slide switch	Desktop mode switch*1	Balanced headphone output	Standard 4.4mm port
Headphone output	Standard 3.5mm port + Supports CTIA-standard inline mic	Coaxial output	Standard 3.5mm port (shared with PO)
Special Functions
Desktop mode	Supported	Status display	The display shows transfer format, volume, gain, desktop mode, sampling rate, EQ, etc.
EQ adjustment	10 built-in EQ presets, custom EQ supported (up to PCM 384KHz)	Recording/Calls	Built-in mic and mic supporting in-line controls
Screen rotation	Supported	Firmware upgrade	Supports USB-OTA updates
Gaming mode	4 built-in gaming sound effect: FPS/ACT/MOBA/MUG	Charging	Charges the ESTICK via the POWER IN port
Sampling rate support	USB DAC: Up to 768kHz/32bit; DSD512 (Native)	Charging	Charges the main device via the POWER IN port
Sampling rate support	Coaxial output: UP to 384kHz/24bit
Power Supply Parameters
Power supply	DC 5V ≥ 2A
Audio Parameters
Performance and parameters of headphone output (3.5mm, USB DAC Desktop mode: High gain)
Output power	L+R≥420mW+420mW (16Ω, THD+N＜1%, 2.6Vrms)	Output impedance	＜1Ω
	L+R≥295mW+295mW (32Ω, THD+N＜1%, 3Vrms)	Crosstalk	≥78dB
	L+R≥35mW+35mW (300Ω, THD+N＜1%, 3.2Vrms)	Peak output voltage	9.25Vp-p
SNR	≥123dB (A-weighted)	THD+N	＜0.00055% (1kHz/-3.5dB@32Ω)
Frequency response	20Hz~85kHz: attenuation＜2.4dB	Noise floor	＜2.1uV (A-weighted)
Frequency response	20Hz~20KHz: attenuation＜0.1dB	Dynamic range	≥122dB (A-weighted)
Performance and parameters of headphone output (3.5mm, USB DAC Desktop mode: Low gain)
Output power	L+R≥150mW+150mW (16Ω, THD+N＜1%, 1.5Vrms)	Output impedance	＜1Ω
	L+R≥80mW+80mW (32Ω, THD+N＜1%, 1.6Vrms)	Crosstalk	≥77dB
	L+R≥10mW+10mW (300Ω, THD+N＜1%, 1.6Vrms)	Peak output voltage	4.6Vp-p
SNR	≥119dB (A-weighted)	THD+N	＜0.00055% (1kHz/-0dB@32Ω)
Frequency response	20Hz~85kHz: attenuation＜2.4dB	Noise floor	＜1.8uV (A-weighted)
Frequency response	20Hz~20KHz: attenuation＜0.1dB	Dynamic range	≥115dB (A-weighted)
Performance and parameters of balanced headphone output (4.4mm, USB DAC Desktop mode: High gain)
Output power	L+R≥460mW+460mW (16Ω, THD+N＜1%, 2.7Vrms)	Output impedance	＜1.5Ω
	L+R≥800mW+800mW (32Ω, THD+N＜1%, 5.1Vrms)	Crosstalk	≥114dB
	L+R≥95mW+95mW (300Ω, THD+N＜1%, 5.3Vrms)	Peak output voltage	15.4Vp-p
SNR	≥126dB (A-weighted)	THD+N	＜0.00043% (1kHz/-8dB@32Ω)
Frequency response	20Hz~85kHz: attenuation＜2.4dB	Noise floor	＜2.2uV (A-weighted)
Frequency response	20Hz~20KHz: attenuation＜0.1dB	Dynamic range	≥124dB (A-weighted)
Performance and parameters of balanced headphone output (4.4mm, USB DAC Desktop mode: Low gain)
Output power	L+R≥315mW+315mW (16Ω, THD+N＜1%, 2.2Vrms)	Output impedance	＜1.5Ω
	L+R≥180mW+180mW (32Ω, THD+N＜1%, 2.4Vrms)	Crosstalk	≥112dB
	L+R≥20mW+20mW (300Ω, THD+N＜1%, 2.5Vrms)	Peak output voltage	7.3Vp-p
SNR	≥118dB (A-weighted)	THD+N	＜0.00044% (1kHz/-0dB@32Ω)
Frequency response	20Hz~85kHz: attenuation＜2.4dB	Noise floor	＜3uV (A-weighted)
Frequency response	20Hz~20KHz: attenuation＜0.1dB	Dynamic range	≥118dB (A-weighted)
Performance and parameters of headphone output (3.5mm, USB DAC Non-Desktop mode: High gain)
Output power	L+R≥320mW+320mW (16Ω, THD+N＜1%, 2.3Vrms)	Output impedance	＜1Ω
	L+R≥175mW+175mW (32Ω, THD+N＜1%, 2.3Vrms)	Crosstalk	≥77dB
	L+R≥20mW+20mW (300Ω, THD+N＜1%, 2.4Vrms)	Peak output voltage	6.8Vp-p
SNR	≥122dB (A-weighted)	THD+N	＜0.00058% (1kHz/-2dB@32Ω)
Frequency response	20Hz~85kHz: attenuation＜2.4dB	Noise floor	＜1.8uV (A-weighted)
Frequency response	20Hz~20KHz: attenuation＜0.1dB	Dynamic range	≥120dB (A-weighted)
Performance and parameters of headphone output (3.5mm, USB DAC Non-Desktop mode: Low gain)
Output power	L+R≥80mW+80mW (16Ω, THD+N＜1%, 1.1Vrms)	Output impedance	＜1Ω
	L+R≥45mW+45mW (32Ω, THD+N＜1%, 1.1Vrms)	Crosstalk	≥75dB
	L+R≥5mW+5mW (300Ω, THD+N＜1%, 1.2Vrms)	Peak output voltage	3.4Vp-p
SNR	≥116dB (A-weighted)	THD+N	＜0.00048% (1kHz/-0dB@32Ω)
Frequency response	20Hz~85kHz: attenuation＜2.4dB	Noise floor	＜1.8uV (A-weighted)
Frequency response	20Hz~20KHz: attenuation＜0.1dB	Dynamic range	≥113dB (A-weighted)
Performance and parameters of balanced headphone output (4.4mm, USB DAC Non-Desktop mode: High gain)
Output power	L+R≥450mW+450mW (16Ω, THD+N＜1%, 2.7Vrms)	Output impedance	＜1.5Ω
	L+R≥360mW+360mW (32Ω, THD+N＜1%, 3.4Vrms)	Crosstalk	≥113dB
	L+R≥45mW+45mW (300Ω, THD+N＜1%, 3.6Vrms)	Peak output voltage	10.3Vp-p
SNR	≥120dB (A-weighted)	THD+N	＜0.00044% (1kHz/-0dB@32Ω)
Frequency response	20Hz~85kHz: attenuation＜2.4dB	Noise floor	＜2.2uV (A-weighted)
Frequency response	20Hz~20KHz: attenuation＜0.1dB	Dynamic range	≥120dB (A-weighted)
Performance and parameters of balanced headphone output (4.4mm, USB DAC Non-Desktop mode: Low gain)
Output power	L+R≥160mW+160mW (16Ω, THD+N＜1%, 1.6Vrms)	Output impedance	＜1.5Ω
	L+R≥90mW+90mW (32Ω, THD+N＜1%, 1.7Vrms)	Crosstalk	≥110dB
	L+R≥10mW+10mW (300Ω, THD+N＜1%, 1.8Vrms)	Peak output voltage	5.1Vp-p
SNR	≥115dB (A-weighted)	THD+N	＜0.00043% (1kHz/-0dB@32Ω)
Frequency response	20Hz~85kHz: attenuation＜2.4dB	Noise floor	＜3uV (A-weighted)
Frequency response	20Hz~20KHz: attenuation＜0.1dB	Dynamic range	≥115dB (A-weighted)

BAL Output 4V High Gain Desktop Mode @32Ω

Power Parameters
Power Consumption and Test Conditions:
3.5mm headphone output power consumption: 0.85W
D·MODE	ON	Gain	High Gain
Volume	44	Playback track and format	MP3 44kHz/16bit
Screen status	OFF	Load	32Ω
EQ	OFF
4.4mm headphone output power consumption: 0.95W
D·MODE	ON	Gain	High Gain
Volume	37	Playback track and format	MP3 44kHz/16bit
Screen status	OFF	Load	32Ω
EQ	OFF
Temperature Rise Parameters
Temperature Rise and Test Conditions:
3.5mm headphone output temperature rise: Screen 40°C, Front 39°C, Bottom 44°C
D·MODE	ON	Gain	High Gain
Volume	44	Playback track and format	MP3 44kHz/16bit
Screen status	OFF	Load	32Ω
EQ	OFF	Ambient temperature	30℃
4.4mm headphone output temperature rise: Screen 41°C, Front 41°C, Bottom 44°C
D·MODE	ON	Gain	High Gain
Volume	37	Playback track and format	MP3 44kHz/16bit
Screen status	OFF	Load	32Ω
EQ	OFF	Ambient temperature	30℃

BAL Output 3.3V High Gain Non-Desktop Mode @32Ω

PO Output 2V High Gain Desktop Mode @32Ω

PO Output 2V High Gain Non-Desktop Mode @32Ω

Test conditions: -5dB sinusoidal signal, 20Hz–20kHz, BAL Output High Gain Desktop Mode (32Ω load)

Test conditions: -5dB sinusoidal signal, 20Hz–20kHz, BAL Output High Gain

Non-Desktop Mode (32Ω load)

Test conditions: -5dB sinusoidal signal, 20Hz–85kHz, BAL Output High Gain Desktop Mode (32Ω load)

Test conditions: -5dB sinusoidal signal, 20Hz–85kHz, BAL Output High Gain

Non-Desktop Mode (32Ω load)

Test conditions: -5dB sinusoidal signal, 20Hz–20kHz, PO Output High Gain Desktop Mode (32Ω load)

Test conditions: -5dB sinusoidal signal, 20Hz–20kHz, PO Output High Gain Non-Desktop Mode (32Ω load)

Test conditions: -5dB sinusoidal signal, 20Hz–85kHz, PO Output High Gain Desktop Mode (32Ω load)

Test conditions: -5dB sinusoidal signal, 20Hz–85kHz, PO Output High Gain Non-Desktop Mode (32Ω load)

Test conditions: -8dB sinusoidal signal, BAL Output High Gain Desktop Mode (32Ω load)

Test conditions: -4dB sinusoidal signal, BAL Output High Gain Non-Desktop Mode (32Ω load)

Test conditions: -2dB sinusoidal signal, PO Output High Gain Desktop Mode (32Ω load)

Test conditions: -2dB sinusoidal signal, PO Output High Gain Non-Desktop Mode (32Ω load)