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User manual of Nobsound NS-04G PRO
Warm tips：
This is latest updated version that simplify the circuit, upgrade the components and greatly improve the sound quality.
- With standard stereo RCA audio input, perfectly compatible with many audio devices such as phone,TV, MP3 players, CD players, DAC, computers etc.. With built-in preamplification circuit, can match well with audio source that with low signal output.
- Adopting classical TPA3116 IC chip in each channel, class D amplification, the max output power can reach 100W+100W(4Ω load), easily to drive all home bookshelf/ computer/ desktop/floor-standing/outdoor passive speakers.
- Reasonable circuit, concise wiring layout and perfect protection, no sparks no shock. With ultra-low distortion and dynamic balance, the sound is very smooth and natural, powerful in low frequency and delicate in high frequency. The speaker terminals use a staggered design, which provides more space ond makes connection easier.
- Mini size with exquisite appearance, aluminum alloy black case looks fashionable and attractive. With strong output power and high-quality sound, exclusively designed for the customers who pursue HiFi sound, very suitable for home / office desktop audio system use.
- Brand: Nobsound
- Model: NS-04G PRO
- Audio input: stereo L/R RCA
- Audio ouput: banana speaker jacks
- Number of channel: 2.0
- Chip: TPA3116D2 ×2
- Max. output power: 100W+100W
- Frequency Range: 20Hz-20kHz (±1dB)
- THD: ≤ 0.01%
- SNR: ≥ 118dB
- Input sensitivity: ≤ 280mV
- Matched speaker impedance: 4-8Ω
- Working voltage: DC 12V-24V
- Dimensions(W*D*H): 87*108*35mm / 3.43*4.25*1.37in
- Package dimensions(W*D*H): 150*150*50mm / 5.91*5.91*1.97in
- Net weight: 290g / 0.56lb
- Package Weight(Without power supply): 400g / 0.88lb
- Package Weight(With power supply): 700g / 1.54lb
- NS-04G PRO Amplifier ×1
- 19V Power Supply(Optional) ×1
- User Manual ×1
Dual TPA3116
- Classic dual TPA3116 audio chip can offer 100W x 2 high power
- Suits most home bookshelf/desktop passive speakers
Volume Control
- Smooth volume control knob
- Integrated power switch design
RCA Input
- Standard stereo RCA input
- Compatible with many audio devices like phone, TV, MP3, DAC, PC .etc
Upgrade DC Connector
- Upgrade DC connector can ensure higher electronic safety. No spark issue
Customer Reviews
The chips are good, the build quality is good, the provided power supply is the let down.The provided 19V low wattage power supply can not supply the amplifier with enough power. It will distort and highs will lose definition at about 2/5 volume and up.The datasheet for the TPA3116 states a maximum voltage of 26V. Nobsounds website states the amplifier can support up to 24V. Common laptop power supplies can go to 24V and are the easiest to get; if you have a gaming laptop you are half way there.After upgrading to a 24V 240W supply I was able to go to maximum volume and wattage though my Polk book shelf speakers. No distortions, no audio crackling from the under powered provided supply, highs so clear and loud I could hear them though my skull. As I was wearing double hearing protection when testing maximum volume.You need to be careful with this amplifier as with the stock configuration you could instantly blow low wattage surround and/or book shelf speakers (Allot of those are not even rated for more than 25W RMS each and this amplifier can provide more than that stock). And after upgrading the power supply you definitely will.The TPA3116 are some great chips (They can do the advertised power of 200W RMS in this configuration) when used correctly. But the provided power supply will NEVER make it there.
I'm using this little amp to drive two large-desktop-size speakers out in a home theatre setup of 7.1.4 channels of Dolby Atmos sound. Using just a pair of RCA jacks from my Denon amp, this mini-amp is powerful enough to drive a pair of power-hungry ELAC Debut 3-way 100-watt speakers. It does not seem to colour the sound at all. My speakers sound as good as they did when the $1,400 main amp was driving them.I absolutely recommend this mini-amp, either to add extra speakers to a home theatre or to play stereo music in a medium-sized room. The amp does not have wireless or Bluetooth functions, so it has to be physically plugged into the source of the sound, such as a laptop or desktop computer or a turntable.
Fantastic little amp for the money. I paired this amp with a set of PSB Alpha B1's. Was pleasantly surprised with the sound out of the box. Even more impressed after I did some EQ adjustments. Cannot go wrong for the price and form factor. It rivals big brand name units for sound and power. Great for desktop speakers, or high sensitivity floor standing units.
This was surprisingly good for the money. I originally thought this would only be a temporary solution for me but I'm not so sure anymore. The only thing I wish this had was optical and HDMI inputs.
If you want just an inexpensive 2-ch power amp for your small living space, you will not be disappointed. I bought this because of its specs and the brand name (I have had satisfactory experiences with Nobsound before). I was looking for a backup amp when my normal amp is in for service. Boy, am I surprised. IMHO, my other amp being serviced produces a much warmer sound to my ears in my system, but it costs 20 times more. So, what can I say? Because of its price point, I have no idea how well-made it is and how long it will last. Speaking of which, my other expensive amp is now in service. I only give it a 4-star because of its unknown build quality.I have to have work done on my main power amp again. And I have to deploy this little amp again. What a pleasant surprise! It is driving my Magnepan LRSs bought recently without any effort, so obviously it has sufficient current to do the job. And it sounds great. So I am wondering why I need to spend more than 15 times as much on a regular amp with only marginal improvements. It is really the 64 million dollar question in our audiophile world regarding diminishing returns.
