This is an Apos Certified product. That means it's refurbished, like new, eligible for our 45-day return policy, carries an Apos Certified One-Year Warranty, and ships from our US facility. Currently, Apos Certified products are only available to customers with a US shipping address. We appreciate your understanding as we aspire to expand our offerings to a broader audience in the future.

Portability + performance

The TOPPING NX7 is a portable amplifier with the features that count: incredibly low distortion, 20-hour battery life, and loads of output power.

NFCA amplifier

The new NFCA amplifier circuit was specifically designed for portable amplifiers. With a THD+N of 0.00007% and an SNR of 135dB, the NX7 is one of the cleanest portable amps on the market.

Drive full-sized headphones...

The NX7 can output 180mW of high power under a load of 300Ω. With the help of its 3-step gain setting, it can easily power full-sized headphones. High power doesn’t equal high distortion. Even when the output is 200mW, the load distortion is only 0.00008%.

...or IEMs

Using the low gain of the NX7, you can easily drive IEMs. At -13.8dB, the low gain gives you plenty of room to control the volume of extremely sensitive IEMs without damaging them or your hearing.

Anti-mistouch design

The 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 reducing the possibility of breaking the headphone plug.

20-hour battery life

The NX7 can get up to 20 hours of battery life at low and medium gains, and 10 hours at high gain.

Product highlights

• NFCA Modules
• 3-step gain settings
• <0.00007% THD+N
• 135dB SNR
• <0.3uVrms of noise
• 20 hour battery life
• <0.1Ω output impedance
• 1400mW maximum output power

Specs

3.5mm headphone output

• THD+N @1kHz (A-wt)
• <0.00008% @ 200mW 32Ω
• <0.00007% @83mW 300Ω
• THD @20-20kHz (90kBW)
• <0.0010% @ 200mW 32Ω
• <0.0002% @ 83mW 300Ω
• SNR @ MAX OUT 1kHz (A-wt): 135dB
• SNR @ 50mV OUT 1kHz: 104dB
• Dynamic range @1kHz (A-wt): 135dB
• Frequency response: 20Hz - 40kHz (±0.1dB)
• Output level
• Low gain: 7.4Vpp
• Medium gain: 11Vpp
• High gain: 21Vpp
• AP measured noise level@A-wt
• Low gain: <0.7uVrms
• Medium gain: <0.7uVrms
• High gain: <2.0uVrms
• Actual noise level
• Low gain: <0.3uVrms
• Medium gain: <0.3uVrms
• High gain: <1.3uVrms
• Channel crosstalk @1kHz: -91dB
• Input sensitivity
• Low gain: 13Vrms
• Medium gain: 4Vrms
• High gain: 1.5Vrms
• Gain
• Low gain: -13.8dB
• Medium gain: -0.1dB
• High gain: 13.9dB
• Output impedance: <0.1Ω

4.4mm headphone output

• THD+N @1kHz (A-wt)
• <0.00008% @ 200mW 32Ω
• <0.00007% @83mW 300Ω
• THD @20-20kHz (90kBW)
• <0.0010% @ 200mW 32Ω
• <0.0002% @ 83mW 300Ω
• SNR @ MAX OUT 1kHz (A-wt): 135dB
• SNR @ 50mV OUT 1kHz: 104dB
• Dynamic range @1kHz (A-wt): 135dB
• Frequency response: 20Hz - 40kHz (±0.1dB)
• Output level
• Low gain: 7.4Vpp
• Medium gain: 11Vpp
• High gain: 21Vpp
• AP measured noise level@A-wt
• Low gain: <0.7uVrms
• Medium gain: <0.7uVrms
• High gain: <2.0uVrms
• Actual noise level
• Low gain: <0.3uVrms
• Medium gain: <0.3uVrms
• High gain: <1.3uVrms
• Channel crosstalk @1kHz: -96dB
• Input sensitivity
• Low gain: 13Vrms
• Medium gain: 4Vrms
• High gain: 1.5Vrms
• Gain
• Low gain: -13.8dB
• Medium gain: -0.1dB
• High gain: 13.9dB
• Output impedance: <0.1Ω

Output power:

• 1200mW x2 @16Ω THD+N<0.1%
• 1400mW x2 @32Ω THD+N<0.1%
• 820mW x2 @64Ω THD+N<0.1%
• 180mW x2 @300Ω THD+N<0.1%
• 90mW x2 @600Ω THD+N<0.1%
  

Adapter impedance: >8Ω

Dimensions: 5.3 x 2.7 x 0.62” (13.5 cm x 7.0 cm x 1.6 cm)

What’s included

• TOPPING NX7
• 3.5 to 3.5 audio cable
• USB charging cable
• Rubber band
• Rubber pad
• User manual
• Warranty card

Featured reviews

"Their specs and price make this not only one of the best mobile amps but one of the best amp at the price." -Joshua Valour

"The NX7 is an absolute beast." - Passion for Sound