TOPPING NX3s Headphone Amp

The Topping NX3s Headphone Amp improves on the predecessor, the NX3, with an output of 545 mW at 32 ohms. The higher power output allows it to drive headphones and IEMs with low distortion and noise. It has two gain settings and a selectable bass boost with the option to toggle between the two settings. The NX3 also uses OPA2140 and LME49720 chips to provide a live and musical sound.

Specs:

• Output power: 545 mW x 2 at 32 ohms, 100 mW x 2 at 300 ohms
• THD + N at 1 kHz: 0.0017% (32 ohms, 273 mW), 0.0003% (300 ohms, 50 mW)
• THD + N at 20 - 20 kHz: 0.0025% (32 ohms, 273 mW), 0.0008% (300 ohms, 50 mW)
• Frequency response: 20 Hz–200 kHz
• Noise at 32-ohm load: 2.5 trV (gain = L), 6.5 trV (gain = H)
• Gain: 0 dB / 8.8 dB
• SNR: 120 dB
• Size: 10.7 x 6.6 x 1.36 cm