NX3    Portable Headphone Amplifier
 
     
  TPA6120A2 Amplifier  
     
 

The TPA6120A2 is a very high fidelity headphone amplifier. it’s current-feedback AB amplifier architecture delivers high bandwidth, extremely low noise, and up to 128dB of dynamic range.

 
     
  OPA2134 HIFI Operational Amplifier  
     
 

The OPA2134 is ultra-low distortion, low-noise operational amplifiers fully specified for audio applications.

 
     
 
Aluminum body
 
     
 

A highly automated machining center needs more than 46 processes to make a NX3’s aluminum case.

 
     
 
Matte surface
 
     
 

We use same surface blasting process as MACBOOK air to get a fine matte effect.
All characters was engraved on the surface by laser.

 
     
 
Easy to use
 
     
 

We design a suitable size for operating the knob and make 2 notch on the side of panel to fit your finger.
Toggle switch of gain & bass control are easier to operate and read.

 
     
 
Selectable Mega Bass
 
     
 

NX3 boosts only mega bass effect to you while bass on.
And if bass off, mega bass circuit will be fully cut off, it will not bring you extra distortion and noise.

 
     
 
High-quality components
 
     
 

NX3 has a good amplifier chip, better components will upgrade it’s performance to be better.
That’s why we use ALPS potentiometer, WIMA capacitance, and also gilded the headphone jack, the switch and the PCB.

 
         
 
Long playback time
 
 
Fully charge<4h

 

Playback>25h
 
30 min charge

 

5h playback
 
       
  2400mAh Lithium Ion battery provide >25 hour playback time which needs less than 4 hour to be fully charge.
30 min charge could provide 5 hour playback time if low power.
   
     
 
Low battery reminder
 
     
 

When the battery is low, NX3’s power LED will turn red to remind you to charge it as soon as possible.
After the power LED turns red, the remaining power can provide about half an hour playback time.

 
     
 
Adaptive Charging
 
     
  NX3 automatic fits 0.5A current from PC’s USB port and 1A current from a USB charger. It takes less than 4 hour to fully charge NX3 at 1A charge current.  
 
   
  Note:
For a USB charger which output >1A cuttent, NX3 will use 1A current to charge.
   
 
     
 
30 min charge for 300 min playback
 
     
 

When the battery is low, NX3’s power LED will turn red to remind you to charge it as soon as possible.
After the power LED turns red, the remaining power can provide about half an hour playback time.

 
     
 
Certification
 
     
 

NX3 has CE, ROHS and FCC certification.

 

 

Analog input 1 x 3.5mm
Headphone output 1 x 3.5mm
Playback time Approx 25 hours
Net weight Approx 145g (unit only)
Dimensions Approx 6.6CM x 1.3CM x 10.8CM
Includes 1 x NX3
1 x Audio cable
1 x USB charge cable
2 x Silicone band
5 x Velcro
1 x User's manual
 
Suitable Headphone Impedance 16-300Ω
Maximum output power 103mW (RL=16Ω, THD+N=1%)
98mW (RL=32Ω, THD+N=1%)
30mW (RL=250Ω, THD+N=1%)
Maximum output voltage swing 8.3Vpp
Minimum THD+N 0.0018%
THD+N(@1kHz) 0.0031% (RL=32Ω, Pout=5mW)
0.0032% (RL=32Ω, Pout=50mW)
Frequency response 10-100kHz (20-20kHz±0.2dB)
Input sensitivity 1Vrms (GAIN=L); 0.52Vrms (GAIN=H)
Noise <9μV
Gain(@1kHz) +0dB (GAIN=L); +9.2dB (GAIN=H)
SNR 108dB (RL=250Ω, GAIN=L)
  User's manual download