Kinter K3118-2.1 Bluetooth 5.0 Stereo Digital Receiver Amplifier 2.1 Channel Mini Hi-Fi Class D Amp 30 Watt x 2 Channels + 80 Watt Subwoofer for Home TV DIY Auto Outdoor Passive Speakers Subwoofer

I'm not usually one to leave reviews, but this little amp has impressed me so much that I felt it deserved it. Last year we added a new back patio on to our home, and one of the upgrades we included was an outdoor audio system. While shopping for components, I couldn't justify the costs of some of the ready to go wireless/bluetooth audio systems I was seeing, so I decided to piece my own system together. After lots of research and google-fu, I decided to go with this Kinter amp for a few reasons: compact form factor, Bluetooth and wired input ability, and sufficient power output for my needs, and cheap enough that I wouldn't be upset if it didn't survive outside. I paired this up with a set of Polk Audio 8" outdoor ceiling speakers, and all in I'm only about $350 into my outdoor audio setup. All I can say is this combo has blown me away. Using my phone as the BT audio source and volume set to 50% on my phone and 50% on the amp, it's more than loud enough for us and crystal clear audio. If I turn my phone up to 100%, it's unbearably loud on the patio, and my neighbor that's more than 100yds behind us can hear it easily. I'd honestly be scared to know how badly it would blow my speakers out if I tried to go a full 100% on both ends. This thing has been going strong living it's entire life outside for the last 8 months, and has given me zero issues so far. I plan on picking up another one of these soon for the audio system I'm going to be installing in my workshop too.

This little fellow solved my problem perfectly. I needed a unit to which I could attach wired speakers to use with my computer, and after three futile research attempts I came upon the Kinter unit. I needed clamps to attach the speakers and this unit has four. Attaching my speakers, holdovers from a shelf stereo, was incredibly easy. I connected my computer to the unit through Bluetooth and voila! Beautiful sound, much better than the smaller computer speakers I was using. Kinter sent the item quickly and I was back in business. Wonderful amplifier. Small, but with a powerful punch...

I have to admit, I was a little skeptical about this amplifier, then I set it up. I am currently using this as a custom solution for a desktop sound system. I am using a Sony 3.1 desktop bookshelf speaker system with a Sony 10 inch woofer and it sounds amazing. To get the center channel, I bridged left and right speaker outputs (one positive, one negative) to the center channel speaker. This amp is very stable at 4 ohm loads, so bridging two 8ohm speakers with a third in the middle leaves a 4ohm load on the front channel which does not even cause heating or clipping even at the ridiculous volumes I enjoy. Also, having the dedicated passive subwoofer output is awesome, it even has its' own volume control so you can finitely dial-in the right amount of bass for your setup. For the price, you cannot go wrong with this amp. It may look small, but it really delivers in desktop or bookshelf applications. I have used this to drive two Paradigm 9se 4ohm tower speakers as well, and again, this little amp drives those huge tower speakers with no struggle. Bluetooth works well, and the line-in features are either RCA inputs or the standard headphone-type input, which is awesome if you are running linbe-out from your PC or laptop. I highly recommend!

Been using this as a home stereo receiver for almost a year now. Works great. Only drawbacks are that the built-in Bluetooth has quite a bit of delay, so it's not great for anything other than music, and it would be nice if there were more outputs.

It seems like I looked at every mini 2.1 amplifier here at Amazon, but none of them brought as much to the table for such a reasonable price as this Kinter K3118-2.1. The amps in the $25 - $35 price range are either just circuit boards or sandwich type cases (both of which look like high school science projects to me), and the price for the amps in full aluminum cases jumps to $70 - $80 – with most of those still requiring the purchase of a power supply. At $40, the Kinter K3118-2.1 is the happy medium with a full aluminum enclosure, a 19V 5-amp power supply, and dual Texas Instruments amplifier chips that provide all the juice I need for my DIY 2.1 system. With its good looks, solid build, and quality features, I feel that this is the hands down best value for a mini amplifier to be found here at Amazon. The Kinter K3118-2.1 is light, yet sturdy feeling, and, in my opinion, is the best looking mini amplifier here at Amazon. Both the power switch and the BT/LINE selector switch are solid and durable feeling and click audibly in a highly satisfying manner when toggled. The separate control knobs for the subwoofer, bass, treble, and master volume have a “just right” feel of tension to them with no sloppiness at all. Basically, the switches and knobs have the same feel to them as the switches and knobs on my far more expensive audio/video equipment inside my house. The Kinter K3118-2.1 really impresses me with a level of quality that belies its low cost. It’s nice to feel like I got more than I paid for once in a while, and I definitely feel that way about this amplifier. Connection can be done via Bluetooth or line, and both work flawlessly. In 2-1/2 months of use, it has never failed to connect to the Bluetooth on either my android phone or iPad, nor has it ever dropped the connections. I don’t think I own any other Bluetooth device that I can say that about, so pretty darn solid in that department. The speaker connectors are of the spring-loaded variety, and they clamp down on my 16-gauge wire tightly and securely. An interesting aspect of the K3118-2.1 that I didn’t see on any other 2.1 amplifiers is that the subwoofer is connected by bridge mode versus having some form of dedicated plug to facilitate the process. This is really neither good nor bad in my book, but it does require a little more work to make some splices to get a subwoofer connected. PRO TIP: I am using low voltage landscape wire instead of actual “speaker wire”. Braided copper wire is braided copper wire, and low voltage landscape wire or lamp wire is much cheaper than “speaker wire”. I built my speaker cabinets out of 1/2-inch MDF and used 8-ohm DROK 3-inch woofers along with these surprisingly great sounding no-name 6-ohm 3/4-inch tweeters wired to Uxcell crossovers for my mains, and an 8-ohm 6-1/2-inch Dayton Audio DC160-8 for my subwoofer. According to the product description, I lose 10 watts per channel using 8-ohm speakers instead of 4-ohm, but 20 watts per channel is fine enough for me, and I prefer the lower heat generation of 8-ohm since this system is in my garage. The sound quality far exceeds my expectations, and I rarely turn the volume knob past the quarter mark to fill my 20 x 25 garage with crisp highs, solid midrange, and some satisfying low end punch. Movie soundtracks are also quite a surprise with sharp, clear dialogue and deep rumbling bass during explosions. The Kinter K3118-2.1 appears to be a high quality product that provides a lot of bang for the $40, and warrants serious consideration for anyone building their own mini system.

I needed a new solution for playing music in my office, and decided that a Bluetooth-enabled amplifier would fill the bill. I had purchased similar amps in the past and liked the sound quality for the price. This unit has outputs for a subwoofer, which I am not using right now, but it is nice to have the option to add later on. The integrated Bluetooth receiver is also a nice addition. I am using this amp to connect to my laptop to stream music, and it works perfectly for that purpose. Pairing was very easy, and it re-pairs perfectly and quickly when I switch the amp on. The amplifier has inputs for an RCA cable as well as a headphone cable. With the Bluetooth, it provides a nice range of options to connect source devices. I know this is not high fidelity equipment, and there will always be those with better ears than mine that are critical of the sound quality. However, this is a sub-$40 amplifier that includes Bluetooth and connections for a subwoofer. For what I am using it for, it is a perfect blend of function at a reasonable cost. If you have an extra pair of speakers, this amp would be perfect for building a low-cost stereo system for a kid (which is exactly what I did with my last similar amp). Great product!

This is not my first mini-amp. I started with the TI chip Fosi, but it lacks Bluetooth. I then bought another little amp with Bluetooth, but misplaced it in a move. Not a big loss as I didn't really like that one. It didn't have an on/off switch and I would have to reconnect Bluetooth every time I turned it back on with the volume knob. The Kinter maintains Bluetooth connectivity. So, for several months I was using a battery powered Bluetooth speaker for my gym room. I grew tired of charging batteries and the boxy, hollow, mono sound of that speaker. Enter the Kinter 2.1. I paired the Kinter with a pair of Sony 4" 2-way bookshelf speakers that I found at Goodwill for $10 and a Pioneer 6" passive sub, also from Goodwill for $10. The combo sounds fantasic considering the total cost of the setup I put together is less than I paid for the Ryobi battery powered speaker it replaced. Great stereo imaging, decent bass, decent treble, smooth full sound, and enough power for my moderate-volume listening needs. I did some testing, and the amp does have a built-in low pass on the sub channel (a good thing). A typical sub amp will have a knob to adjust the frequency of the the low pass, which this does not. But a fixed low pass is better than nothing. Power on the sub channel seem adequate to keep up with the mids. This is, of course, dependent on the match or mis-match between the size/cone area of your mids and sub. You can run stereo subs with this amp, which would be an unusual setup, or you can bridge the sub amp. The instructions are unreadably tiny, so look up how to bridge an amp on Google. You basically take a 4" length of speaker wire and make a jumper between the left and right, then connect your sub to either side. How to set up your subwoofer level: With your L R and Sub speakers connected to the amp, start with the bass and treble knobs in the 12:00 position and Sub volume all the way down. Stand in the primary listening position in your room and slowly turn up the Sub volume until you barely hear the sub begin to blend in with the mids. Now back the sub volume off ever so slightly until that the sub disappears back into the mix. Now that the Sub level is set, you can adjust the bass and treble knobs to get the desired sound curve. Setting up the levels in this way ensures that the sub blends with the low end of your L R speakers so that you can't pick out where the lows are coming from in the room. Low frequencies are omnidirectional and this will ensure you maintain proper stereo imaging the the 2.1 system.

I bought this for outdoor use (under cover) with a projector and for music. The bluetooth range is pretty decent and we use it on a regular basis. It lives outdoors and is mounted in a box so it's not directly exposed to the weather and has held up well. The sound is clear with a couple of outdoor speakers and gets louder than I need. The only downside is that I didn't realize the USB port on the back doesn't power up an old iPod touch I use for playing music on with it. I would have returned it for a replacement but I was past the return window when I tried using it. Other than that it works well and seems to be a good inexpesive option for a stereo amplifier with bluetooth and line in capabilities.

Excelente calidad, y muy buen precio, con unas bocinas de calidad suena perfecto, la potencia es adecuada para una habitación pequeña-mediana (24 m^2) que es donde lo tengo instalado. La función Bluetooth también está muy bien se sincroniza de forma inmediata tengo conectado el amplificador a un iPhone X, Xiaomi redmi 9, Samsung 10s y a 3 laptops en todos ellos no ha variado su función.

At first I thought this thing was broken, but after re-checking all my cables and making sure they were plugged in, it all worked fine as expected. Its the lowest price 2.1 amp i have found on the internet

Lo uso con Bluetooth conectado a un Cel Realme a 4m de distancia y funciona bien, no hay interrupción de la señal, el sonido es claro con la potencia suficiente para ambientar una recámara de 3x4m; le conecte unos baflesitos con woofer de 4'' y un subwoofer de 8'', ambos son accionados apropiadamente. No lo he conectado por línea de entrada porque resultó que mi pantalla no tiene salida de audio analógica, por lo que estoy esperando que me llegue el convertidor para probarlo viendo películas de plataformas.

El amplificador está bueno, suena muy bien, el subwofer se escucha bien, es facil y sencillo de utilizar, se conecta rapido por bluetooth, tuve un problema particular con mi pedido, que el cargador con el que llegó no funciona, estaba a punto de devolver el producto cuando encontré un viejo adaptador de corriente que tenia y decidií probarlo ya que era del mismo voltaje, y para mi sopresa funcionó, es decir el amplificador estaba bueno pero el adaptador de corriente que no parecia ser original sino uno generico y de mala calidad con el que llegó, no funcionaba, por el precio, decidí no devolverlo ya que el amplificador como tal si es bueno, pero no se si es cuestion del vendedor que envian el producto con un cargador generico de mala calidad, por eso le doy 4 estrellas al producto y 2 al vendedor, continuare probando el amplificador y pondré un update en un futuro sobre como ha continuado despues de unos meses.

Muy buen producto, fácil de instalar y funciona perfectamente, lo conecté a un par de bocinas aiwa que eran de un equipo de sonido modular de los años 90. El sonido es muy bueno y el bluetooth funciona muy bien.