Nobsound100W Subwoofer Digital Power Amplifier Audio Mini Amp (Black)

EDIT29 July 2025I love my first amp so much, I decided to buy a second one. My first amp has a Blue power light, the new one I received has a Red light. The Blue sounds great powering my 8", 8-ohm HTIAB sub under my desk. Swapped it for the Red, and had to crank the volume to max to get what Blue puts out at ~30%. Same cables and power supply, so I know the issue is the Red amp. To prove my point, I powered my computer chair bass shakers with the Red amplifier on a 24V 200W Meanwell power supply. Boosting the signal by 21dB through a DSP, I managed to get a reasonable amount of shaking with the volume cranked to 90%.Returned to Amazon for a new amp, and I hope Amazon doesn't recycle this amp back into its supply. I will leave my rating at 5-stars until I get the replacement.ORIGINAL REVIEW12 Nov 2024Class-D amplifier uses very little power when not used, so it does not need an auto-off switch. Volume knob doubles as power switch, so you can turn it off manually without unplugging it. A benefit of this type of power switch is that it mitigates any power-on/off popping.Works perfectly with an old 8-ohm 8" passive HTIAB subwoofer rated for 100W. I haven't noticed any noise or hissing with this amp, unlike a different (much higher priced) Class-D sub amp I own. I don't think the Nobsound gets to 100W, but the speaker is plenty loud for a medium room. Connected to a passive sub, this Nobsound amp won't shake the seats in your home cinema... but it would if used as a bass shaker amp.This amp pairs nicely with a 65W/19v laptop power supply and a 50W BST-1 bass shaker. I love how my lounge chair rumbles while watching The Dark Knight, especially when the Batmobile is on screen. I've also hooked it up to four 16ohm 25 watt bass shakers and an old 135W laptop power supply to make my computer chair shake with movies and games alike. I have picked up spare ~19V laptop power supplies free from office buildings being renovated, so I have a few options.This amp has a decent low pass filter, especially for the price, but it will pass the lower voice frequencies to bass shakers if fed a full signal. I recommend a 70Hz low pass filter, or use an LFE port set to 80Hz if you plan to drive a bass shaker.The only real negative is it only has a 3.5mm minijack input.I did a head-to-head comparison between this amp and a PBTL/Sub amp from a big Fbrand on Amazon. That PBTL/Sub amp did NOT work well at filtering voice frequencies, no matter how I turned the knob. I ended up returning that one and keeping this Nobsound amp. The Nobsound doesn't have a ton of features, but it just works.

With active subs disappearing and becoming ridiculously priced, this IS actually a solution. The passive-to-acitve sub this made, actually sounds better and its quite obvious.Now I do feel that each unit should come with a power supply (cheap to order, but be careful not to get one without!), as well as a 3.5 stereo to single rca... but I assume these exclusions are there to keep the price down, and many of us audiophiles have a bunch of scraps laying around.This is what you want. This is for my piecemeal setup for my pc, and now I can thrift a better active sub!Highest recommendation I can give. Get this, instead of hunting for an active sub unless you need an active sub for a setup that should have an active sub already!PS: Currently using it with a 15v 1a, and it is working great. Full range on this older Samsung HitB mini sub.

I only have one passive subwoofer, and I don't plan on buying another one anytime soon. I picked up this small subwoofer amp because it was on sale. This will power the subwoofer, but will not play very loud, but I wanted it so I can match my passive subwoofer with some of my other setups. Nothing great, but it gets the job done.

I bought this little guy to power my Aura bass shaker and WOW! For something the size of a pack of cigarettes this does the trick extremely well. Now to address "the sparks" (oh no, run hide) that people are mentioning. If you cant seem to follow BASIC instructions and unplug the power supply from the amp before unplugging from the wall then yes you do see a few tiny sparks less noteworthy than flicking a lighter once. Big deal, follow instructions. Not sure whats up with the smoking references since I don't but moving on. Now I will concede, the hole the power supply plugs into is a bit big making the connection feel wobbly but once mounted properly youd never have an issue. Buy this cheap, tiny yet powerful amp, buy the SEPERATE power cord (both combined are still very affordable so stop whining), and go town with this thing. VERY IMPRESSED AND WILL BUY ANOTHER SOON!

Very sneaky... The seller somehow made a bait & switch with their product. I bought this amp (with power supply) for $23.49 on 5/31. It worked well enough that I added another of the same to my cart and sat on it for a while until it had a price drop again ($23.99). This time the product doesn't contain a power supply, and only when you expand the description text does it say at the bottom this specific product doesn't come with a power supply.The original amp with power supply is a good value so far. It's still working after a month of occasional use. I'd give the amp 5 stars for the value at this price, but the shady power supply shenanigans need to be communicated to other potential buyers...

First off, save yourself some money and buy the other model that comes with the power supply instead of buying them separately.Now for my impressions:No auto power off - this sucksI bought this to use on a passive sub. It works adequately for the situation but don't expect earth shattering bass. My sub provides subtle support to the sound stage, which is good, but it doesn't have a ton of volume even with the knob all the way up.If I had it to do over again, I would just buy the Monoprice powered sub. This solution is too much of a compromise in order to save $15 in my opinion.