AK45 Stereo Audio Amplifier,300W Home 2 Channel Wireless Bluetooth 5.0 Power Amplifier System, Home Amplifiers FM Radio, USB, SD Card, with Remote Control Home Theater Audio Stereo System

Excellent price for a basic unit that performs very well. Very good power to produce high quality sound via Bluetooth thru 2 quality speakers. FM tuner also responds well and unit includes additional input options.

I was really sceptical about buying this little guy but figured if it didn't work out for my need I could use it for something else. I wanted a small receiver for my shop and an old pair of Klipsch tangents (these are 4ft speakers with 12s to set some perspective), and wanted a small receiver that I could hide in the top of my toolbox(a full receiver wouldnt even fit). Needless to say I was absosutely blown away but this little thing. PLENTY loud enough for my shop and needs, bluetooth range and remote works great as well.

I didn't buy this as stand alone amplifier. I have a Pheanoo 15 soundbar for my 75" Samsung TV. The sound bar came along with a 4" ported subwoofer (box shown in photo). After 2 years of use the subwoofer foam surround started to detach from the cone and sounded horrible. So I am innovative so this is what I did.I cut the cloth covering the speaker then pulled the blown 4" subwoofer. I was surprised it was rated for 4 ohms instead of the usual 8 ohms for home use. The blown speaker was rated for 40 watts and I assumed it was 40 watts RMS. Now I could have bought a 4" sub rated for 4 ohms and just hooked it up and been done with it. But I had a pair of 6.5 inch component speakers from an old car installation that was rated for 30 watts RMS 300 watt Max and obviously 4 ohms. So what I did was cut the ported box for the 6.5 inch to fit into. Problem solved I had the bass back and worked just a tiny bit better than the 4" factory subwoofer. But gears started turning in my brain and said if one speaker is just a little better and I have a second speaker from the pair two speakers would be better.So I started searching for little amps on amazon and to my surprised I came across this little Daakro AK45 and it was rated for the almost the exact rating as my 6.5" JVC component speakers, 40 watts RMS and 300 watt max. Perfect match and for the price i couldn't beat it so I bought it!To make it work for my application I cut the 2 wires running to the subwoofer box and spliced in 2 male RCA connectors from my old junk wire drawer. The wires I cut were clearly labelled + and - so I stripped the cut RCA connections and wired the positive wire to both positive wires for the RCAs and the same for the negative. Put it on Aux and turned on the TV and soundbar and the soundbar fed the input through the RCA connections to the amp and the amp fed that signal to the replacement speakers. It worked but this is where it got tricky with trial and error.I was getting signal after matching the input level by ear ( I couldn't find my Oscilloscope) when I shut off the TV and the soundbar shut off I would get a buzzing sound though the 2 speakers the amp fed. Now when the TV and sound bar is on and muted there is zero distortion or buzzing noise. It wasn't super loud but bothersome none the less. So I started turning the power switch off on the amp at night when not in use. But when I turned it back on and the TV and soundbar kicked on it would distort out bad and the input level didn't match up like I had it set, it was way to high. Now i fought this for day until I realized there is actually 2 different input levels for this amp. There is the analog dial which I was adjusting and there is a remote that came with it. When u turn it up and down with the remote it ranges from 0-30 digitally, the analog dial doesn't change, there is a digital level. Regardless of what you set the digital level to when you power the amp off with the power switch then turn it back on the digital input gets reset to the maximum of 30!This explains why I could never maintain proper input level matching! Now I understand that using spliced RCA connectors from a high level input source without a high to low input adapter isn't ideal, that could very well be why I'm getting the buzzing sound when the TV gets turned off. But when I turn the digital input to the middle which is 15 and then set the analog input dial I get way better sound with more bass and no distortion.I have a high to low input adapter sitting in my wife's old vehicle from an old car audio installation so I'm gonna rob that to see if it resolves the distortion I get when TV is turned off. And if it is resolved I will update this review but doubt it will be. It could be just the type of sound bar I have who knows but i wish this amp didn't have 2 separate input levels of digital and analog and since it does I wish they had some kind of constant wire to retain memory of where the digital input level was set when powered off manually with the switch.But my review is for the money your not gonna find much better for the money and for the abilities such as radio and bluetooth and Aux. But if your planning on buying this and powering any kind of real 3 way home entertainment speaker ya know a tweeter a mid level component and a subwoofer this product isn't what your looking for. 40 watts RMS isn't even as powerful as most car radio head units that are rated for 50 watts per channel.Yes it will give you sound but it will not move and real home 8 ohm subwoofer in a 3 way or 4 way speaker configuration. I'm very surprised its handles 4 ohm speakers, most home audio is 8 ohm or higher. For those who don't understand what ohms are they are basically the resistance for the amplifier encounters when converting the input signal to usable power. The lower the ohm of the speaker the lower resistance the amp encounters to produce the power to the speakers. A typical 8 ohm home speaker will encounter double the resistance to get power from this amplifier compared to a 4 ohm speaker.If you have 8 ohm speakers of any real power handling capacity I would strongly discourage this product. Don't focus on the 300 watt Max Rating, focus on 40 watts RMS rating but I assume that would be the RMS for a 4 ohm speaker and not an 8 ohm speaker or higher. Now there is a way to change the ohm resistance that the amp encounters when wiring speakers that is typically for a dual voice coil subwoofer or when wiring speakers in series which this product wouldn't be for an application such as that.P.S. If using this for the application I did, my soundbar had built in low pass crossover to block out the high frequencies from reaching the speaker but still turn the treble all the way down.Now if I wanted to listen to the radio or use the bluetooth or SD cards I can get high frequencies from my speakers since they are component speakers but my primary use is for my TV soundbar. If I listen to music its thru apps like Spotify or Pandora

Great little amp for our basement speaker set up with lots of options. Kids love it, because it;s easy to find and they BT with phones.

I'm using this reviver as a shop radio in a garage, driving a pair of Polk Audio T15 bookshelf speakers (non-powered, 8 ohm). At comfortable music listening volumes, in a small space, the sound is excellent -- far better than I expected from this price point. Your milage may differ in large spaces and/or high volumes. Bluetooth has worked fine with my iPhone. Non-volatile memory remembers the station playing last time the unit was on. Minor irritations: defaults to Line input each time you turn it on, rather than the mode you had selected last time you listened to it. You have to toggle to Bluetooth or FM mode each time (again, only minor irritation). You can't dial-in individual stations manually, but the stations I listen to are strong enough to be assigned a preset by the setup scan. First unit ordered was DOA, but the replacement that came the next day has performed flawlessly. Using wire antenna included, which is suitable for strong stations in an urban area. But I ordered another 75 Ohm antenna recommended by other reviewers. Warning: out of the box, all the controls are dialed up to 11, so the first time you turn it on, the Bluetooth "ding" sound is startlingly thunderous. Considering buying a second unit to put in the glovebox of in a vintage car.