TOPPING NX1S Portable Earphone Amplifier Portable Amps with 40 hours Continuous Play Time for Phones, MP3s, Digital Players and Computers - Black

NX1S is a Portable Headphone Amplifier designed to improve the sound quality and volume of any portable audio source. such as MP3 players, iPods, personal media players, mobile phones, laptops, notebooks/netbooks.

Solid, Powerful

Suitable for headphones ranging from 16 to 300 Ohms, the NX1S is potent enough to drive all but the most power hungry headphones. Use the low gain setting with high sensitivity IEMs, or switch it to high gain for full size headphones. 

Audiophile Grade Design

The NX1S offers superior sound quality through expertly selected components and design. Its pre-amplifier section is based on the TI OPA1611, with excellent layering, midrange resolution, and high frequency extension. 

Sophisticated Bass Boost

A fully discrete bass boost circuit increases output, producing a gentle swell of low end energy that preserves the overall sound field. 

Craftsmanship

The NX1S is handsome with an all aluminum body and chassis. Not only is it solid and sturdy, it also provides superior shielding from EM interference. A knurled volume knob is mated to a smooth turning ALPS potentiometer. Toggle switches are used for enhanced reliability and are easier to operate. A 1000mAh internal battery powers the NX1S for up to 40 hours of use. 

Specification

FR: 20Hz ~ 200kHz

SNR: >117dB

THD+N: 0.003~0.0005% (@1kHz)

Charge Time: 3h

Work Time: 40h

Drive Capability: 16~300 Ohm

Dimensions: 84mm x 55mm x 10mm

Weight: 78g

Gain: 0dB/8.7dB

Includes

1 x NX1A Headphones Amplifier

1 x Audio cable

1 x Rubber pad 

1 x USB charge cable

2 x Silicone band

5 x Velcro

1 x User's manual