Topping NX4 Portable Headphone Amplifier with built-in USB DACTopping NX4 Portable Headphone Amplifier with built-in USB DACTopping NX4 Portable Headphone Amplifier with built-in USB DACTopping NX4 Portable Headphone Amplifier with built-in USB DACTopping NX4 Portable Headphone Amplifier with built-in USB DACTopping NX4 Portable Headphone Amplifier with built-in USB DACTopping NX4 Portable Headphone Amplifier with built-in USB DAC

Topping NX4 Portable Headphone Amplifier with built-in USB DAC

100% of buyers enjoyed this product! 1 orders
List price:
US $109.99
Price:
US $109.99

Product Description

Topping NX4 Portable Headphone Amplifier

with built-in USB DAC

Description:

Built-in USB DAC

Built-in USB DAC of NX4 could use for iphone, ipad’s lightning port, an Android phone’s USB or a PC’s USB.

*note for Android phone: Only compatible with the Android phone which support OTG and external USB sound card.

OPA1642+LMH6643

NX4 use OP+BUF structure. OPA1642 for input and 2 x LMH6643 for buffer. THD+N is as low as 0.0003% ( 1kHz, 300ohm, 17nW, Gain=L)

Full Aluminum Shell

We use a highly automated machining center to make NX4’s aluminum shell.

High-power laser engraving

All characters was made by high power laser, it will never fall off.

Gain switch and Bass boost

NX4 has a gain switch to meet different needs.

NX4 also has a bass boost circuit, it boosts only mega bass effect to you while bass on. Mega bass circuit will be fully cut off and it will not bring you extra distortion and noise while it was switched off.

Lo batt LED

The power LED turn red to remind you NX4 is in lo batt condition, you need to charge it immediately to avoid damage to the battery.

Charging progess display

Red means NX4 is in charging and green means NX4 had finish charging.

No POP noise

We use NEC relay to void POP noise of turning on and turning off the NX4. This protects your hearing and your headphones.

Less ripple, less background noise

NX4 use tantalum capacitor and higher frequency DC-DC power supply to lower the ripple. This make NX4’s background noise lower.

36 Hour playback time

2400mAh Lithium Ion battery provide 36 hour playback time for NX4’s headphone amp or 12 hour playback time for USB DAC + headphone amp.

The battery needs less than 4 hour for a fully charge.

Adaptive Charging

NX4 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 NX4 at 1A charge current.

Certification

NX4 has CE, ROHS and FCC certification.

Compatible with all USB interfaces

No matter what your USB interface is, NX4 works well with it. This including Micro USB of Android phone, type-C of Android phone, Lightning of iphone or ipad, even your PC.

*note for Android phone: Only compatible with the Android phone which support OTG and external USB sound card.

Specification

Analog input:1 x 3.5mm(share with analog output)

Analog output:1 x 3.5mm(share with analog input)

Headphone output:1 x 3.5mm

Playback time:Approx 30 hours (only headphone amp)
Approx 12 hours (USB DAC + headphone amp)

Net weight:Approx 155g (unit only)

Dimensions:Approx 11CM x 6.8CM x 1.4CM

Suitable Headphone Impedance:16-300Ω

Maximum output power:307mW x 2 (Gain=L, RL=32Ω, THD+N=1%)
35mW x 2 (Gain=L RL=300Ω, THD+N=1%)

Maximum output voltage swing:9.2Vpp

THD+N(@1kHz):0.0010% (RL=32Ω, Gain=L Pout=5mW)
0.0003% (RL=300Ω, Gain=L Pout=5mW)

Frequency response:10-200kHz

Input sensitivity:3.3Vrms (Gain=L); 1.2Vrms (Gain=H)

Noise:<2.9μV (RL=32Ω, Gain=L)
<8.0μV (RL=32Ω, Gain=H)

Gain(@1kHz):+0dB (Gain=L); +9dB (Gain=H)

SNR:120dB(Gain=L)
112dB(Gain=H)

Package:

1 x NX4
1 x audio cable
1 x USB charge cable
1 x Micro to Micro cable
1 x Micro to Type-C cable
1 x Micro to Lightning cable
2 x Rubber band
1 x Rubber pad
5 x Velcro
1 x User’s manual
1 x Warranty card

Company Information

FAQ

1.Voltage

Can you change the voltage and plug?Our voltage is 110V or 220V,and our plug is EU,US or others.
Yes,we will change the voltage and plug according to your shipping address.

2.RMA

Hi seller,I bought one device from your shop before,but it is broken now under warranty,can you help me repair it?

Yes,please send the defective device or wrong device to our Chinese address(please contact our salesman).
Once we received it,we will send you the new replacement or refund immediately.

3.Warranty

I bought your product 7 years ago,but it’s broken now,can you repair it?
Oh…Dear friend,our warranty is 1 year,would you like have a try of the newest one?

4.Shenzhen Shop

Hi,brother,I am going to Shenzhen,China,can I visit your shop?
Yes,my friend,welcome to our shop,and it would be better if you could inform us in advance,so I can prepare your expected products.

Shop address: 4F9,No.3018,Gume,Wanshang Electric City,Huaqiang north road,Futian zone.Shenzhen,China.

5.Free shipping

Hope you could read the FAQ before shopping.

If the weight of the parcel is less than 2KG,we will ship it to you via Singpore post or some other fast shipping methods.

If the weight of the parcel is more than 2KG,we will use shipping method according to your country,not 100% same as your choice.

6.Wholesale service

Dear friend,we want to buy your products in bulk,can you offer me wholesale price?

Of course,please leave us a message or send us an email,we will quote for you,email:sell(at)shenzhenaudio.com

Packaging Details

Unit Type: 
 piece
Our store ships to more than 200 countries and you can enjoy free shipping on all items sold on headphones.shopping
Estimated Delivery Time is 7-30 business.

Note: The delivery time mentioned above does not include order processing time that usually varies from 1 to 3 days.
Different items have their own processing time, which is what we cannot control. But what we can do is try the best to let you receive your items as soon as possible.

The following cases should be taken into consideration regarding shipping times:
  • Weight and dimensions of a package
  • Place of Dispatch
  • Destination
  • Freight
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