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

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'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 tiny amplifier does exactly what I need and has a true 2.1 configuration and plenty of power so I felt compelled to write a long review on this unit. I hope it helps. I plugged in three different 2-way bookshelf speaker pairs - Boston Acoustic CR6s (8 ohm), Yamaha ES-E55s (6 ohm), and Bose Double Cubes (4-8 ohm) - plus three different 3 ohm 8" passive subs - Sony SS-WSB103, Samsung PS-CW0, and Samsung PS-FW102 (4") (side note: all subs were thrift store buys) - and all made good sound via iPhone thru the quickly connected Bluetooth signal. I did not try the component piece since my use is Bluetooth. Just for kicks, I doubled up the 2-way pairs (4 speakers out of the top row) and doubled up the subs (2 subs out of the bottom row) and the amplifier powered everything just fine. I ran the various configurations for about 2 hours at thumping volume with folk, rock, hip hop, and metal and all sounded great. I settled on the best sound for me (it's all subjective) with the Bostons and Sony. Don't let the 30 watts per channel make you believe it will be too small or not powerful enough. I'm betting a mid size or maybe full size pair of speakers would sound good too. A big pro, as noted, is the 2.1. The sub channel is a true sub channel and not a "B" pair of speakers (I plugged in a pair of the 2-ways to the sub ports and it wasn't right at all). Use only a sub in the sub ports. A huge pro, maybe the best part of this amp, is the sub has it's own volume control so you can thump or just allow subtle fuller lows. Lastly, the amp did not get hot...at all. You can put it anywhere...except...the amp doesn't have a remote control so it's manual on/off and manual volume, sub volume, treble, and bass control. Place it within reach. That's mostly fine with an iPhone controlling volume but it should still be shut off. A remote would have made it 6 Stars for me. With every rating, I add the caveat it's only been out of the box for a couple of days and ran a few short hours. I have faith it will last and/or Kinter will make it right if it doesn't.

Great power for such a small and low cost package. I had a 2.1 harmon/kardon speaker system that blew the internal amp. The speakers themselves were in great shape so I used this amp to resuscitate my system. And as an added bonus, I can now directly connect my phone to my speakers via Bluetooth. The Bluetooth connection is easy and fast. There's just a quick "ding ding" to let me know that my phone is connected. Clean sound. No problems there. The LED around the main volume dial lights up blue to let you know it's connected to Bluetooth. (Otherwise it's white when on line-in mode). The dedicated subwoofer volume works well, has plenty of power, and the overall volume of the amp is definitely acceptable for the size. Very happy with this purchase. Buying another one to build a speaker kit for the garage and replace the old boombox.

The first one had a faulty power supply! Wasted 15 minutes screwing around with it! Replacement sent promptly and it works fantastic. Drastically improved audio on my middle of the road tv. It was very easy to pair the receiver. Not super powerful or earth shattering just a good quality little amp. Makes loud undesirable noises when connecting and disconnecting. Very very loud and unwanted. Now I have to drive across town to return the defective product. Why the delivery guy that was just here couldn't pick it up I don't know.

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!

I couldn’t be happier with this small amp! The sound quality is great. No noise at all and the Bluetooth connections are easy to set up and reliable. I’ve used it almost daily for a couple of weeks with no issues. The best feature for me is the high level out for subwoofers. I am able to bi-wire my speakers so that the woofers are driven by the sub out and the other wires go to mids+tweeters. So, instead of using bass/treble knobs (which work fine anyway), I have much more control with the separate volume for subwoofers. I think this amp has been very well thought out and it definitely exceeded my expectations. I am very happy with the amp.

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!

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

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.

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.

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.