TOPPING NX7

TOPPING NX7 NFCA 1400mW Output Power Portable Hi-Res Audio Headphone Amplifier With 3.5mm & 4.4mm Output

Description

Hi-Res Audio

NFCA modules

3 step gain settings

<0.00007% THD+N

135dB DNR

<0.3ɥVrms noise*

20H battery life

<0.1Ω output impedance

1400mW maximum output power

* The actual noise level is obtained by boosting the noise of NX7 by 100 times using a low noise amplifier in front of the APX555B then dividing the measured noise by 100 times.

NFCA amplifier

The new NFCA amplifier circuit is specifically designed for portable amplifiers. The low idle power consumption allows for extended battery life. This is done while having 0.00007% THD+N and 135dB SNR. It's powerful and cleans enough for power hungry full sized headphones and sensitive IEMs.

Easily drive the full size headphone with high performance

The NX7 can output 1 80mW of high power under a load of 300Ω, and with the help of 3 step gain settings, the small body can easily beat the full sized headphones. It is worth mentioning that even when the output is 200mW, the load distortion is only 0.00008%.

Equally outstanding while driving IEMs

The low gain of NX7 is -13.8dB. When used with high sensitivity in-ear headphones, there will be almost no trouble of potentiometer bias in the comfortable volume range. You will no longer need to worry about the embarrassment of the volume setting of high sensitivity in-ear headphones.

The background noise of NX7 is only <0.3ɥV, which is inaudible and as quiet as the deep ocean. 50mW SNR is 104dB.

The output impedance of NX7 is as low as 0.1Ω. Even if it is driving high-sensitivity IEMs, it will not introduce sound coloration. You no longer need to worry about sound matching.

Slim and easy to carry

Anti-mistouch and anti-breaking design

NX7 is designed with corner guards at both ends to protect the entire panel, effectively preventing the volume knob from being mistouched in the pocket, and greatly reducing the possibility of breaking the headphone plug.

Compatible with 3.5mm headphones and 4.4mm plug headphones

20h battery life

Due to the optimization for portable devices, the NX7 can get 20H of battery life at low and medium gains; even if it is switched to high gain, it can also get 10H of battery life.

*Battery capacity: 4000mAh

*Charging time: <5H

*Battery life

1. G=L/M: >20H

2. G=H: >10H

3. After low battery warning(G=L/M): >2H

4. After low battery warning(G=H): >1H

NX7 headphone amplifier specifications

3.5mm headphone output

THD+N@1kHz(A-wt): <0.00008%@output=200mW(32Ω); <0.00007%@output=83mW(300Ω)

THD+N@20-20kHz(90kBw): <0.0010%@output=200mW(32Ω); <0.0002%@output=83mW(300Ω)

SNR@MAX OUT 1kHz(A-wt): 135dB

SNR@50mV OUT 1kHz: 104dB

Dynamic range @1kHz(A-wt): 135dB

Frequency response: 20-40kHz(±0.1dB)

Output level: 7.4Vpp@G=L, 11Vpp@G=M, 21Vpp@G=H

AP measured noise level @A-wt: <0.7ɥVrms@G=L, <0.7ɥVrms@G=M, <2.0ɥVrms@G=H

Actual noise level@A-wt: <0.3ɥVrms@G=L, <0.3ɥVrms@G=M, <1.3ɥVrms@G=H

Channel crosstalk@1kHz: -91dB

Input sensitivity: 13Vrms@G=L, 4Vrms@G=M, 1.5Vrms@G=H

Gain: -13.8dB@G=L, -0.1dB@G=M, 13.9dB@G=H

Output impedance: <0.1Ω

Output power: 1200mW x 2 @16Ω THD+N<0.1%, 1400mW x 2 @32Ω THD+N<0.1%, 820mW x 2 @64Ω THD+N<0.1%, 180mW x 2 @300Ω THD+N<0.1%, 90mW x 2 @600Ω THD+N<0.1%

Adapter impedance: >8Ω

4.4mm headphone output

THD+N@1kHz(A-wt): <0.00008%@output=200mW(32Ω); <0.00007%@output=83mW(300Ω)

THD+N@20-20kHz(90kBw): <0.0010%@output=200mW(32Ω); <0.0002%@output=83mW(300Ω)

SNR@MAX OUT 1kHz(A-wt): 135dB

SNR@50mV OUT 1kHz: 104dB

Dynamic range @1kHz(A-wt): 135dB

Frequency response: 20-40kHz(±0.1dB)

Output level: 7.4Vpp@G=L, 11Vpp@G=M, 21Vpp@G=H

AP measured noise level @A-wt: <0.7ɥVrms@G=L, <0.7ɥVrms@G=M, <2.0ɥVrms@G=H

Actual noise level@A-wt: <0.3ɥVrms@G=L, <0.3ɥVrms@G=M, <1.3ɥVrms@G=H

Channel crosstalk@1kHz: -96dB

Input sensitivity: 13Vrms@G=L, 4Vrms@G=M, 1.5Vrms@G=H

Gain: -13.8dB@G=L, -0.1dB@G=M, 13.9dB@G=H

Output impedance: <0.1Ω

Output power: 1200mW x 2 @16Ω THD+N<0.1%, 1400mW x 2 @32Ω THD+N<0.1%, 820mW x 2 @64Ω THD+N<0.1%, 180mW x 2 @300Ω THD+N<0.1%, 90mW x 2 @600Ω THD+N<0.1%

Adapter impedance: >8Ω

* Note: The actual noise level is obtained by boosting the noise of NX7 by 40dB using a low noise amplifier in front of the APx555B then dividing the measured noise by 100 times.

Package

NX7

3.5mm to 3.5mm audio cable

USB charging cable

Rubber band

Rubber pad