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- Warm and Natural Sound: Built on a single-ended Class A topology, the NS-02G PRO delivers low-distortion output with natural warmth and realism in vocals and instruments. Its smooth, immersive soundstage is perfect for long listening sessions in cozy setups or dedicated HiFi spaces.
- Fully Symmetrical Circuit: The fully symmetrical amplifier circuit reduces phase distortion and maintains signal integrity throughout the frequency range. This ensures cleaner output, improved imaging, and greater musical nuance, especially in acoustic and vocal-rich recordings.
- Powerful Enough for Most Speakers: With RMS output up to 30Wx2 (8Ω) / 42Wx2 (4Ω) in Class A operation, it can effortlessly drive most bookshelf and floor-standing speakers. Enjoy full-bodied sound with punchy bass and detailed mids, whether you're spinning vinyl, streaming, or playing CDs.
- Audiophile Components: With Toshiba 2SA1943/5200 transistors, 150W copper toroidal transformer, ALPS potentiometer, and 40,000μF capacitors, it ensures stable current, deeper bass, and wider soundstage. Gold-plated RCA jacks preserve purity and pluggable op-amps allow higher playability.
- Flexible Inputs and Safety Protection: Dual RCA inputs with an input switch support quick source switching and comparing without plugging and unplugging cables. Built-in protection systems like DC protection, surge-protected delay, and overheat protection, keep both your amp and speakers safe.
- Brand: Nobsound
- Model: NS-02G PRO
- Audio input: 2 groups of RCA
- Audio output: Banana speaker jacks
- Output power (RMS): 30W*2@8Ω; 42W*2@4Ω
- Frequency response: 30Hz-20kHz
- THD: ≤1%
- SNR: ≥86dB (A-weighted)
- Rating input level: 500mV
- Rating load impedance: 4Ω
- Power consumption: ≤120W
- Input voltage: AC 100-120V / 220-240V, 50/60Hz
- Dimensions (W*D*H): 457*310*140mm / 12.99*8.27*2.76in
- Net weight: 5.6kg / 12.35lb
- Package weight: 6.5kg / 14.33lb
- NS-02G PRO ×1
- Power Cord ×1
- Instruction Manual × 1
User Manual of the Nobsound NS-02G PRO
FAQS
Q: How can I replace the op-amps?
A: The swappable NE5532 op-amps are located beneath a relay module. You’ll need to remove a few screws to access and replace them. Please proceed carefully or contact us if unsure.
Customer Reviews
After seeing Ed's "Old Guy HiFi" review on YouTube I decided to give this a try instead of another miniature affordable Class D amp.
I wanted a different sound and have always liked Class A sound with its rich, velvety midrange, fine musical details, its predominance of second order harmonics, and its more "musical" presentation. This amp right out the box does all that to my surprise at this price! After a few hours of breaking in I was thoroughly enjoying the amp. I did change out the op-amps because I had some premium Sparkos on hand and absolutely love it.
This is setup in my garage with a Wiim Ultra connected to a Sony TV. I have these hooked up to a pair of home built ultra efficient speakers at 97db. I barely have this amp or integrated amp turned up and it gets plenty loud in a very large garage.
I highly recommend this amp for anyone loving Class A sound and using relatively efficient speakers.
It sounds great no issues out the box. I swapped the op amps in about 6 minutes with some that are my to go to for my musical taste and wow they sound even better in this amplifier. Don’t get me wrong the amplifier sounds amazing out the box but I like tweaking my components. Just perfect 🤩.
Another excellent Doukaudio product. Thank you ! Sounds great for me, but I know about OPAMPS replacement option. Is there some manual about it ?
Recently purchased one and paired it with the Fiio K13 R2R DAC. Amazing detail sound for the price. Wide soundstage, warm mids but not overly warm and airy top. Very satisfied.
I opened the amp up and adjusted the trim pots so the amp could operate in class A. The sound quality is very, very good. The amp has plenty of power to play loud and clean, even with inefficient speakers.
With a nice DAC and a nice speakers, you have a very nice sound system.