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

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 to replace a plate amplifier on a powered subwoofer for a pair of monitors. The reason I wanted to replace the existing amp was because it had a lot of white noise whenever it was turned on, which was a problem in the quiet, near-field listening environment I had set up. The old amp also suffered from interference (cell phone buzz buzz buzz sounds). This nobsound amp fixed both of those issues. The white noise is minimal, and it has gain switches (which I set to the minimum value) which reduced it further. Someone in another review mentioned there's a pop when the unit powers off, but that's only true if you cut power to the unit (by turning off a power strip). If you use the on/off switch on the unit there's no pop. The amount of power is more than enough for my needs, which aren't much (it's an 8" subwoofer for near-field listening). The amp stays very cool. The built-in EQ worked fine and I was able to tune it to match my monitors without too much trouble. I wish it had an adjustable phase, but you can always invert the phase by swapping the speaker leads, so no big deal. The RCA input is also a bit of a bummer (my previous sub was balanced XLR) but I haven't noticed any hum or other interference problems, so I guess it doesn't matter. For the price, I couldn't be happier.

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 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 Bose Audio system. My Yamaha receiver didn't have the connections I needed for a sub so I got this to allow my sub to hook up to the receiver. Easy adjustments for the volume and freq cut off. My receiver auto powers off after a certain time but this stays on 24/7. No issues at all.

Amplificador clase D de buena calidad; sin embargo para sacar el mayor provecho se requiere de una fuente de mayor voltaje y a corriente para aprovechar la máxima potencia, cumple cabalmente, el nivel de audio es aceptable si se poseen los woofers adecuados, buena compra.

Cheap, good sound and really fast delivery! I bought a cheap 450W powered sub on eBay but it didn't work. Scouring the net I found this amp and decided the outlay was worth risking on an unproven speaker. I ditched the old amp (but salvaged the banana plug terminals and internal wiring) and hooked up this new amp—needless to say, it surpassed my expectations. TBH, I've noticed the tiniest bit of a hum from it, but I previously had huge issues with a ground loop that made my previous set-up un-listenable. Once I've got music or a movie going, the hum is not at all noticable, even on quiet stuff. From what I've seen, there aren't many other mono amps at this price with a frequency dial. And there's even fewer with a bridged mode (PBTL), not that I need this functionality myself. My only wish is that the frequency dial doesn't have any measurements on it, so I've had to guess where the 80Hz mark is. Finally, mine was delivered next day. Very impressed!

サブウーハーとの併用でButtkickerの重低音振動ユニットを以前から使用しており、 振動ユニットのみ単体のサブウーファー用アンプで駆動していましたが、 元ソースとして使用しているAVアンプのLFE（※低音域効果音チャンネル・通常は アクティブサブウーファーの駆動用に使用）ライン出力が低いのか、 ある映像ソースでは丁度いいのに別のソースでは目一杯ボリュームを上げても 殆ど反応しなかったりと今ひとつ安定せず、かといってAVアンプのLFEを弄ると 今度は全体的な音のバランスが崩れるという、どうにも決まらない状況でした。 こちらのサブウーファーアンプも基本仕様は元々使用していたものと殆ど一緒でしたが、 入力ソース側のゲイン調節が可能という点に惹かれて購入。デフォルトより１段低い 入力ゲインで設定したところ、従来のサブウーファーアンプでは殆ど反応しなかった 映像ソースで振動ユニットが反応し、元々が丁度よい映像ソースでも音量ボリュームの 可変範囲で調整可能と、まさに狙い通りの効果で上々の使い勝手です。

Très bonne qualité sonore pour la musique et cinéma maison. Bonne profondeur et fonctionne parfaitement avec mon sub.

Used this to replace the piece of crap buttkicker amplifier I have for my flight sim chair works 1,000,000 times better then the stupid buttkicker one did.