Douk Audio Nobsound 100W Subwoofer Amplifier Digital Power Sub Amp Audio Mini Bass Amp with Power Supply (Black)

I needed a small amp to power my passive Onkyo subwoofer after replacing a 12 year old receiver with a sub amp with its newer counterpart without one. Super easy to install, one knob for power and volume and that’s that. Perfect low end, more powerful than before and one happy guy as I streamed “The Man in the High Castle” in 4K with killer sound.

100 watts...sortaThe included power brick is not powerful enough to push full output. You need to find a 24v supply to get there.Thinking they were trying to extend its life with the brick as the amp gets warm under a full load at 24v.The lows are muddy without tuning. A crossover with eq or digital eq solves the issue . Even audiophiles could probably get behind this little amp. Its good for small to medium rooms like an office or bedroom, I could see an OK application in some home theater setups.Overall a good buy

This thing is tiny; about two inches wide and an inch tall. I took mine apart and mounted the front panel and circuit board into a speaker cabinet. Along the way I noticed that every component was very good quality and the workmanship overall was superb. I cut a pair of wires going to the back panel and was a little sad because the soldering to the rear connectors was so nice.Sometimes I hear a slight burr from the subwoofer I built. I can't tell where that originates - could be the speaker, could be the amp, could be the overall design of the cabinet, or . . . not sure yet. So I did not rate sound quality for that reason. But judging from the workmanship, I am guessing the noise I sometimes hear isn't the amp's fault.

When I saw 100 watts I though it would be loud, but the misleading fact is that it's rated 100W AT 2 Ohms. Who has 2 Ohm speakers? Most speakers are 8 Ohms and that means this will only put out about 25W of sound. I have to turn it up all the way just to even hear it with the music. Disappointed. They gave me a $20 credit when I complained, but now I'm stuck with a unit that is insufficient for my needs. Bummer!

As soon as I turned it on it produced a loud humming noise. Returned it for a replacement. It arrived the next day which was great. Now I have to test the replacement.