Nobsound G2 Subwoofer Power Amplifier Mini Mono SUB Amp 100W PBTL BTL Bridge Home Theater

Thunder. For 50 bucks I am blown away by this tiny little amp that kicks out big Power.I hooked this up to a rejuvenated old Panasonic ported subwoofer from a mini home theater system from the '90s that was reloaded with a $30 Skar Audio 6.5 inch subwoofer.The adjustment knob for the bass frequency coupled with the volume knob and the subwoofer/full-range switch on this little Nobsound unit can pump out some big bass from a tiny sub. It's powerful enough that I cannot turn it all the way up and at 50% volume it sounds amazing. The signal is coming from the AUX port of my Fouk Audio mini tube amp. This combination along with some tiny Polk Audio bookshelf speakers sounds incredible in a 12x12 bedroom. Absolute High-Fidelity clarity, rich sound, clear vocals, and thundering bass. This is a great mini system that will sound (and feel) awesome for a medium-sized room.

I'm using this with an S.M.S.L. A300 amp to hook up a passive subwoofer to it's line-level sub output. It is working perfectly for my needs. PLENTY of power output (I've got the volume set to about 1/3). This devices cutoff of 300Hz is plenty compatible with the 100Hz of the A300.I did notice that in theory the sub freq knob should be able to go down to about 1/3 without impact, but I notice the difference in sound far before that, so I assume it's a non-linear scale. Not a big deal, but might be nice if the knob was labeled in some way so you knew what frequency you are dialing in.That being said for the price I cannot complain.Note that if you are using this for a sub amp be sure to select SUB rather than PBTL with the second switch. If you select full range (PBTL) it has a drastic impact on the output. Which is a BIT odd since I'm already sending only 0-100Hz to the unit from the SMSL. NBD since the SUB setting is most correct for my use anyway, but something to be aware of if you hook it up and think it sounds... off. Quiet.Dont take my minor criticisms for anything but that: nitpicks. I love the amp and am completely happy, especially for the low price.

I used this little amp to replace the burned-out amplifier module in my Energy ESW-8 powered subwoofer. It doesn't sound quite as good as the factory Energy amplifier, but pretty close. There is a slight hum at low volumes, but you can't really notice when music is playing and the bass is pumping. The output power is impressive - I have the gain set at minimum and the volume about halfway and my subwoofer gets plenty loud. It seems to be fairly equivalent to the factory Energy amplifier module in the ESW-8, which was rated at 100 watts (200 watts peak).Interestingly, this amp's output is noticeably louder when set to Sub mode compared to PBTL (full-range) mode. The constant low-level hum from this amp is also higher pitch in PBTL compared to Sub mode. In Sub mode, the low-pass crossover is very effective but the frequencies are not marked on the front panel so you have to guess where your cutoff point is. The amp's low-pass crossover seems to be a 12dB/octave slope with a range somewhere around 40Hz-200Hz. I'm using this amp with the LFE output from my receiver, so I set the amp to full-range (PBTL) mode and use the receiver's LFE crossover.The power supply included with the amp seems to be doing a fine job but it is very basic and cheap. It is a generic laptop-style brick rated at 19V, 4.7 amps. I would not be surprised if the actual power supply peak output is far below the labeled 4.7 amps, based on the power supply's small size and light weight. Total rated output power for the power supply is 89 watts (19V x 4.7A), so the amp itself can't put out more that about 85 watts using this power supply. The amp is rated at 12V-24V supply voltage and you'll probably need a beefier 24V/5A power supply to get the listed 100W output. Online forums and reviews, however, indicate that 19V is probably the sweet spot for the TPA3116 chip.Overall, this amp is a real bargain. It works great as a replacement for a powered subwoofers's internal amp and it would power some modest bookshelf speakers quite nicely. There's a bit of hum but it's not noticeable at listening volumes. The selectable sub/full-range mode is a great added feature and the selectable gain switches are icing on the cake. Great purchase, and I'd buy it again.

I have an older M&K "Volkswoofer" sub. It sounds absolutely fantastic but the internal amp is starting to fail. I considered having it repaired / recapped but then I was like "Let's try one of those cheap Class D amps and see how that works out!"This little amp is absolutely perfect. Super tight bass. Gone is the buzzing, popping and gurgling sound that was coming from the built in amp. The built in amp also ran so hot that you could barely touch the back of the sub without burning your fingers.This little amp is quiet, stays cool and sounds wonderful. And it costs far less than having that old built in amp repaired. My sub now works and sounds like new.The two voice coils in parallel measure 2 ohm which is really low but this little gem can actually handle that low an impedance!Absolutely fantastic. Unbelievable at this price too.If you are just like me reviving an older sub, this thing is what you need to buy!

Perfect amp for bass shakers, more than enough power, well built, nice big knobs