wholesale Nobsound G2 PRO Hi-Fi 2021 300W 2021 Subwoofer Audio Mono Channel Class D Power Amplifier online

wholesale Nobsound G2 PRO Hi-Fi 2021 300W 2021 Subwoofer Audio Mono Channel Class D Power Amplifier online

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Nobsound G2 PRO Nobsound G2 Douk Audio G4 Nobsound NS-03G SUB Nobsound NS-03G FR Nobsound NS-03G SUB Board
Feature Support both SUB & Mono; 300W high power Support both SUB & Mono; Gain adjustment Support both SUB & Mono Only for subwoofer; Super mini size; Low cost Mono Channel Amplifier Subwoofer Amplifier Board
Power 300W 100W 100W 100W 100W 100W
Channel 1.0 (1.1) 1.0 1.0 1.0 1.0 1.0
Input RCA RCA 3.5mm AUX + RCA 3.5mm AUX 3.5mm AUX 3.5mm AUX
Output Passive Mono Speaker / Subwoofer + Active Subwoofer Passive Mono Speaker / Subwoofer Passive Mono Speaker / Subwoofer Passive Subwoofer Passive Mono Speaker Passive Subwoofer
THD ≤0.03% ≤0.03% ≤0.001% ≤0.04% ≤0.04% ≤0.04%
SNR ≥106dB ≥106dB ≥103dB ≥98dB ≥98dB ≥98dB
Speaker Impedance 4~8 ohm 2~8 ohm 4~8 ohm 2~8 ohm 2~8 ohm 2~8 ohm
Power Input 32V 5A 19V 4.74A 19V 4.74A DC 8-25V >3A (not included) DC 8-25V >3A (not included) DC 8-25V >3A (not included)
Douk Audio P1 Douk Audio T3 PRO Douk Audio U2 Little Bear MC5 Douk Audio VU2 Music Levels
Feature Bluetooth vacuum tube preamp; Headphone amplifier; USB DAC; APTX-HD; Tone control Vacuum tube audio preamp & MM phono preamp USB to Toslink optical & coaxial converter; Digital interface; XMOS XU208 4-CH audio mixer; Portable; Fully passive MIC+LINE VU meter & Audio splitter MIC sound level; Audio spectrum; RGB LED

300W Mono/SUB Amplifier

  • 300W high power can most passive subwoofers and mono speakers
  • With PBTL/SUB toggle to switch between full frequency and SUB modes

Gain Adjustment

  • With 2-level of putout level setting (32/36dB)

SUB Frequency Control

  • With bass cutoff frequency knob (40-300Hz)

Active SUB Output

  • Besides passive speaker output, it also supports active SUB out.
  • With two G2 PRO, you can build 2.0/2.1 audio system easily

Nobsound G2 PRO

Packing List
  • 1* G2 PRO Power Amplifier
  • 1* 32V/5A Power Supply

Parameters

  • Max Power: 300W
  • Full frequency response: 20Hz-20kHz(±3dB)
  • The speaker matches the impedance: 4-8Ω
  • THD: Output 1W @ 0.03%
  • Working Voltage: DC24-35V
  • SNR: ≥106dB
  • Input sensitivity: 0.775V
  • Bass cutoff frequency range adjustment: 40-300Hz
  • Slope of bass attenuation: -12dB Slope

  • Product Dimension (L*W*H): 127*118*35 mm / 5.0*4.6*1.4 in
  • Package Size (L*W*H): 257*215*65 mm / 10.1*8.5*2.6 in
  • Net Weight: 0.5 kg / 1.1 lb

Features & details

Features

  • With PBTL/SUB switch: convenient to use G2 PRO as full frequency amp or subwoofer amp, a SUB output is specially designed for active subwoofer. G2 PRO can connect to both passive and active subwoofers. And two G2 PRO can be used to drive left and right channel independently to avoid mutual interference.
  • Max 300W output power: using TPA3255D2 amp chip and equipped with 32V/5A large power supply, enough to drive 320W passive speakers or subwoofers. It also has a good match with outdoor/ bookshelf/ computer/ desktop /ceiling /floor standing speakers.
  • Best design and HiFi sound: with a gain switch to allow 2-level of output level setting (32/36 dB) and SUB frequency adjustment (40-300Hz). It also has built-in speaker protection circuit, low-pass filter to guarantee no audible noise even at high power output, SUB signal and amp can output at the same time to bring HiFi listening experience.
  • Mini size with exquisite appearance: mono integrated class D amplifier, simple compact design but with powerful function, more fashionable and durable solid aluminum chassis, very suitable for HiFi home and desktop audio system use.

Product information

Product Warranty: For warranty information about this product, please click here
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Q: The amplifier comes with a 32v/5a power supply (160w) yet you claim a max power output of …

A: 200 watts RMS into 2-ohm loads, 150 watts RMS into 4-ohm loads or 120watts to 8-ohm loads …

Saltlifer | 3 weeks ago

Q: It works for a 12" 450rms car subwoofer with dual 4 Ohms?

A: Yes

GuitarGuy69 | 5 months ago

Q: Will this power 2 dayton audio bst-1 high power pro tactile bass shaker 50 watts wired in …

A: Wiring two of these in series will get you 8 ohms (4+4) instead of 4 ohms. Wiring them i…

M0E | 1 month ago

Q: What is the size of the DC barrel connector on the included power supply?

A: Standard 5.5 mm barrel 10 mm long

M0E | 1 month ago

Customer reviews

4 out of 54 out of 5
94 global ratings

Top reviews from the United States

A. Seltzer
5.0 out of 5 starsVerified Purchase
An Affordable Mono Amp Experience
Reviewed in the United States on October 12, 2020
I only have only logged a few hours of listening so far but that may be ample for leaving my preliminary thoughts. Also, unlike most who seem to be buying this as a mono amp for subwoofer amplification, my intent was to buy two of these for use as mono amps for stereo left... See more
I only have only logged a few hours of listening so far but that may be ample for leaving my preliminary thoughts. Also, unlike most who seem to be buying this as a mono amp for subwoofer amplification, my intent was to buy two of these for use as mono amps for stereo left and right channels. I’ve always been curious about the benefits of mono amps for stereo and these amps provide an inexpensive way to experience that.

These amps add to my ongoing collection of high value, surprising performance Chinese high fidelity products. I have come to expect performance beyond price and these mono amps follow through. The general build, the switches, and the connectors are all quality. Setup was easy and was up and running in less than 10 minutes. I simply connected my Bluetooth DAC, an FX Audio X6 and another high value component, to my vintage tube preamp, then the left output on the preamp going to the left input on one mono amp and the right output going to the right input on the other. After connecting my speakers, I set the mode on both amps to PBTL and I was ready to go. The preamp was likely not necessary but I thought it might be nice to add some tube warmth to the experience. At some point I may eliminate the preamp from the chain to evaluate the mono amps on their own.

My first impression was that the sound was very midrange forward with good high end. Bass seemed to be very subdued which, given the bass capability of my Tekton Lore speakers, was noticeable. However, after about half an hour, the bass started to bloom. Perhaps needing time to warm up or charge capacitors, these amps were now sounding truly full range. Clarity, separation, and dynamics were all there. With just about 1/3 of the volume turned up, volume was room filling. Considering those speakers only need a watt or two to get going, these amps have way more power than needed, which brings me to my next point.

I don’t know how Nobsound can call this a 300 watt amp and I believe they sacrifice credibility by promoting this spec. The power supply can only provide 160 watts and thats into a 4 ohm load. I’m not sure how that translates to 8 ohms but power is not a limitation for my purpose. Being class D topology, these amps can stay on for hours while feeling only slightly warm. I suspect I may only be getting closer to 100 watts out of these amps, which is still more than ample for my highly efficient speakers, especially since one amp is dedicated to the left channel and the other is dedicated to the right.

These amps merit comparison with my class AB Aragon 200 watt amp from the 80s, despite how some may deride class D operation. I suspect the Aragon amp will seem somewhat more refined, perhaps warmer and fuller where the Nobsounds may be thinner, but that amp was many times more expensive and is very heavy. I am skeptical that it is that many more times higher in fidelity.

At this early juncture, I am very pleased with these mono amps. Time will tell how well they hold up but other Chinese components I have have been problem free for the longer term. How these amps compare against vintage class AB gear will have to wait. I’m enjoying these mono amps too much on their own merits to spend time on such comparisons right now.

Update 12/26/20: I have since bought a Nobsound 6p1 tube amp, also with positive results. While more expensive than a pair of G2 Pros, the 6p1 represents a great value in a true class A tube amp. Nevertheless, I decided to give the 6p1 a rest and hook the G2 Pros back up. Even compared to a hand wired class A tube amp, the G2 Pros still cane across as impressive and equally enjoyable. If anything, they seem more broken in than before and compelling through the full audio range. I continue to be impressed with Nobsound/Douk Audio products, both tube and solid state. I still have not A/B compared them with vintage or higher cost gear, but I think I would have to listen very critically to discern the differences.
12 people found this helpful
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Ken AC
5.0 out of 5 starsVerified Purchase
Amplifier works well
Reviewed in the United States on January 29, 2021
I bought this amplifier to substitute for the failed amplifier in my Klipsch subwoofer. My testing of the Nobsound was limited to a quick listen of (full range) audio through it, connected to a normal loudspeaker. The full range audio through the Nobsound was very good... See more
I bought this amplifier to substitute for the failed amplifier in my Klipsch subwoofer. My testing of the Nobsound was limited to a quick listen of (full range) audio through it, connected to a normal loudspeaker. The full range audio through the Nobsound was very good (obviously subjective, but for what it''s worth I have a decent sound system for comparison).

I then just ran the subwoofer output of my receiver to the Nobsound input, and hooked up the output directly to the driver (i.e., loudspeaker) in the subwoofer. The Nobsound seems to have plenty of power to drive the subwoofer. The only caveat is that the Klipsch (built-in) subwoofer amplifier might have had some sort of frequency compensation in addition to the rolloff setting. I may get around to testing the flatness of the whole system — of course any problem with that does not reflect negatively in any way on the Nobsound amplifier.
3 people found this helpful
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Darryl Harris
3.0 out of 5 starsVerified Purchase
Great if you can hook it properly
Reviewed in the United States on July 24, 2021
I really wanted this to work in my DAW work station. I recently bought a Polk audio subwoofer and I wanted to use this. Technically, I really didn''t need it because my sub comes with a built in amp but I just wanted extra power so I wouldn''t put much strain cranking full... See more
I really wanted this to work in my DAW work station. I recently bought a Polk audio subwoofer and I wanted to use this. Technically, I really didn''t need it because my sub comes with a built in amp but I just wanted extra power so I wouldn''t put much strain cranking full volume. I tried so many way hooking this up but none work. You just need how to wire audiophile products. I pretty good at wiring audio inputs didn''t think it would be much of a problem. Couldn''t get any sound from it. Nothing was wrong with the unit besides it was 300 watts arms would have more than enough power plus it came with a subwoofer frequency dial and you can cut or boost your sub frequencies which would have been great. I just might by it again but I''ll probably get a computer geek to help me.
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Saltlifer
5.0 out of 5 starsVerified Purchase
Great Sub-woofer Amp
Reviewed in the United States on October 3, 2021
Built-in amp on my Harmon Kardon 200W 8" sub stopped working, so I purchased this great little amp. It has enough power (estimate 160W RMS-300 peak) to easily drive my subwoofer and provides great ''oompf'' factor. Amp allows you to set your sub crossover frequency and to... See more
Built-in amp on my Harmon Kardon 200W 8" sub stopped working, so I purchased this great little amp. It has enough power (estimate 160W RMS-300 peak) to easily drive my subwoofer and provides great ''oompf'' factor. Amp allows you to set your sub crossover frequency and to adjust output level to match your main speakers using the volume control. Works great with either passive sub woofers or to replace amp that came with active subwoofers like I did.
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oo7
5.0 out of 5 starsVerified Purchase
the little amp that could
Reviewed in the United States on August 25, 2021
Nobsound G2 PRO Hi-Fi 300W Subwoofer Amplifier..i bought this little amp on a whim..i needed a replacement amp for a 12" self powered home sub i use for my electronic drums (strike pro le)..i wasn''t expecting much from it...well it works great with plenty of power for my... See more
Nobsound G2 PRO Hi-Fi 300W Subwoofer Amplifier..i bought this little amp on a whim..i needed a replacement amp for a 12" self powered home sub i use for my electronic drums (strike pro le)..i wasn''t expecting much from it...well it works great with plenty of power for my uses...it moves the sub well...and cleanly too.. the crossover could use something to indicate roughly what frequency its at but otherwise this little thing does what is advertised...i am happy with my purchase...i recommend it.
One person found this helpful
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Donyela
1.0 out of 5 starsVerified Purchase
junk
Reviewed in the United States on January 10, 2021
It does not drive a passive sup as described! It only drives an active sub. ( I tested on both ) The gains are minimal at best. I''m only keeping it as a remote control for my active sub. Save your money and just buy an active sub.
One person found this helpful
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Brian Williams
2.0 out of 5 starsVerified Purchase
No legible instructions on how to get 300w
Reviewed in the United States on October 5, 2021
It seems like a decent amp for the money. I didnt receive any instructions on how to make the crossover from 100-300. I have it hooked to a 300w home theater Polk audio sub. The plate amp blew so i got this until I can replace the caps in the blown amp. It puts out a little... See more
It seems like a decent amp for the money. I didnt receive any instructions on how to make the crossover from 100-300. I have it hooked to a 300w home theater Polk audio sub. The plate amp blew so i got this until I can replace the caps in the blown amp. It puts out a little sound but nothing to write home about. If your looking for an amp that will give you a little fill in for a small 100amp 8inch sub it’s a decent buy for the money. Otherwise save up and spend a little more in something that actually does and shows you how to connect it to get the power they claim.
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Marc
4.0 out of 5 starsVerified Purchase
Not 300w but still pretty good.
Reviewed in the United States on September 21, 2021
This offers 200w max estimated and only after gains turned up. I even tried a bigger power supply at 35v and 10amps. Still a pretty good little amp for powering a passive sub. I''m using it to power 3 bass shakers wired in series and works good for that.
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GERMAN H.
5.0 out of 5 starsVerified Purchase
Excelente
Reviewed in Mexico on September 10, 2021
Excelente potencia, calidad de audio, me gusta el encendido, pues se puede utilizar con un contacto inteligente y asi encender mi Denon al mismo tiempo con Alexa, lo estoy usando con un subwoofer de exterior OSD force y trabajan perfectamente en conjunto!
Excelente potencia, calidad de audio, me gusta el encendido, pues se puede utilizar con un contacto inteligente y asi encender mi Denon al mismo tiempo con Alexa, lo estoy usando con un subwoofer de exterior OSD force y trabajan perfectamente en conjunto!
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