Topping NX3s Portable Headphone Amplifier OPA2140 LME49720 USB Bass Gain HiFi Digital Audio Power Amplifier(Black)

Topping NX3s Portable Headphone Amplifier OPA2140 LME49720 USB Bass Gain HiFi Digital Audio Power Amplifier(Black)


Price: $69.99 - $59.49
(as of Oct 15,2020 07:07:05 UTC – Details)



Topping NX3s Portable Headphone Amplifier

Product Name:Topping NX3s
Color: Black,Silver
Size: 10.7 * 6.6 * 1.36 CM (Excluded protruding parts)
Weight: 157G (Excluded accessories)

Performance parameters
Chipset: OPA2140 + LME49720
Charge Description: DC5V1A, (also can be charged by computer USB port).
Input interface: 3.5mm headphone interface
Ear output interface: 3.5mm headphone interface
Battery capacity: 2400mAh
Full fill charging time <4H
Standby time >18H
Power indicator: Blue (bright red when low power).

Charge indication: red when charging (slow charging); orange (fast charge), bright green when full of electricity.

Product parameters
Total harmonic distortion @a-weighting
<0.0017%@ 1KHZ Output=273mw (32Ω)
<0.0025%@2020 khz Output=273mW (32Ω)
<0.0003%@1 khz Output=50mW (300Ω)
<0.0008%@20-20 khz Output=50mw (300Ω) Output amplitude:
11.5vpp @32Ω Gain=L, Bass=OFF
15 Vpp@ 300Ω Gain=L, Bass=OFF

Bottom noise:
<2.5uVrms @ Gain=L
<6.5uVrms @ Gain=H Signal to noise ratio @ A-weighting: >120dB@1kHz
Frequency response: 20Hz – 200kHz (±0.55dB)
Channel crosstalk: -90db @1khz
Channel balance: 0.04dB
Gain: 0db/8.8dB
Bass boost: 0db/4db (70HZ)
Output power: 545mW x 2 @32Ω THD+N<1% 100mW x 2 @ 30Ω THD+N<1%
Adapted impedance : 16 – 300Q

Package included:
1 * Topping NX3s Headphone Amplifier
1 * USB charge cable
1 * 3.5mm cable
5 pairs * Velcro
2 * Bandage
1 * User’s manual
1 * Warranty card
1 * Rubber pad

♫ Changable Op Amp: OPA2140 + LME49720. LME49720 has an operational amplifier socket and can be changed to other DIP-8 dual op amp.
♫ Bass and Gain Adjustment:NX3s can satisfy different listening preferences and make up for the lack of earphone bass.0dB / 8.8dB gain regulation.
♫ Rechargable Lithium Battery:NX3s built in 2400mah Lithium ion battery. NX3s can adaptively charge current of 0.5A or 1A. If 1A current charger is used, it can be filled for 4 hours.
♫ Portable and Exquisite Design:Delicate, compact, lightweight, and cute that it can be Carry Conveniently.

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