Topping NX7 Portable Headphone Amplifier
Key info
The Topping NX7 is a portable headphone amplifier with up to 20 hours of music (10 hours when using high gain).
All specifications
| Frequency Response | 3.5mm headphone output: 20Hz-40kHz (±0.1 dB) | 4.4mm headphone output: 20Hz-40kHz (±0.1 dB) |
| Gain | 3.5mm headphone output: -13.8dB @G=L -0.1dB @G=M 13.9dB @G=H | 4.4mm headphone output: -13.8dB @G=L -0.1dB @G=M 13.9dB @G=H |
| Outputs | 3.5mm headphone output: < 0.1 Ω | 4.4mm headphone output: < 0.1 Ω |
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 clean enough for power hungry full sized headphones and sensitive IEMs.
Easily drive the full size headphone with high performance
The NX7 can output 180mW of high power under a load of 300 ohms, and with the help of 3 step gain setting, 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 <0.3uV, which is inaudible and as quiet as the deep ocean. 50mV SNR is 104dB.
The output impedance of NX7 is as low as 0.1Ω. Even if it is driving high-sensitivity lEMs, 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.
