Nobsound 100W Subwoofer Digital Power Amplifier Audio Mini Amp (Black)

Works well with an old 8ohm 8" passive subwoofer. I don't think it gets to 100W, but the speaker is plenty loud for a medium room. I haven't noticed any hissing with that configuration. Connected to my passive sub, this amp doesn't exactly shake the seats down in my sister's home cinema. But it would if I used it 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. (Those small shakers rattle during the lowest frequencies, but that's a different review.)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.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 brand 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.

I have an old sub-woofer that I rebuilt and the amp plate was not working very well. I was looking to buy another amp plate and saw this product. Given the difference in price I decided to risk it and purchase this amplifier. I was surprised at how good it sounds and how easy it was to hook up. I took out the old amplifier plate and then put connectors with leads to the woofer on a wood plate. I put the this unit on top of the sub box and then connected to the main amplifier sub-woofer connection. I had to put an RCA splitter on the cable and then connected everything via an RCA to mini plug for the input. I used banana plugs for speaker connections to sub-woofer amp. The unit does not come with a power adapter but I had a 12v 6amp power adapter and it worked just fine. So far so good. Sound is clear with plenty of power for a 10 inch driver. I am going to order another one as I have another sub woofer project in the offing and will be using the Nobsound as the amp. I will update if I have any problems.

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.

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.

It is pretty great for the price point. The only real problem I have with it is that it doesn't have an on/off switch. But this can be easily remedied by using an extension cord that has an inline switch. Other than that, this is really good. I was worried it wouldn't be powerful enough to run my giant subwoofer, but it does. Maybe not as powerful as a full powered speaker, but it has a lot of thump to it. It doesn't have quite as much power as when I was able to run the subwoofer off the receiver directly, but that's a good thing. It was a bit too boomy before. Now, it's just about right.The BIGGEST problem is every so often, the subwoofer will just put out a HUGE and constant booming buzz or hum. I have solved this by unplugging the power cord and plugging it back in. But the noise came back. I unplugged the plug part of the cord and turned it around before I plugged it back in. This fixed the noise...for a while.But last night, I noticed that when the noise happened, I picked the amp up to turn it off...and the noise stopped. I realized that I had jiggled the 3.5mm input connection. I've tried everything that I can think of to get the noise to permanently stop.It should NOT be this difficult to get this thing to work. If I had known the trouble it would give me, I would never have wasted so much money on it.

Bought to run a Polk subwoofer. Liked the small size and power output. It had good reviews to I purchased the amp. Works great, the reviews were correct.

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.

Desceptively small but gets the job done...if you get a nice DC power supply. for $18 I got a 24volt x 6 amp supply with the right connector (center positive, 5.2mm). Goes right up to 100 watts with power to spare. When I used lower power bricks the amp peaked about half way up the dial and then dropped off, as others have reported. Nothing wrong with the amp. It's the wimpy power brick!