Kinter MA170 12V 2 Channel Mini Digital Audio Power Amplifier for Car or Mp3 Without Power Supply

I'm using this to replace my desktop speakers with some Klipsch RSX-5 speakers. The speakers are rated for 75 watts so I wasn't entirely sure this would power them sufficiently. It was actually plenty, with good speakers, this can fill a room with a good level of loudness. I was worried about the power draw so I dug up my watt meter and saw it was only using 2.6 watts!!!!!! (now I'm using 1.6 Watts MAX) At this point I was intrigued and I set it up to my two Polk Monitor60 Floorstanders (with 3 6" woofers and a tweeter in each, for a total of 8 speakers, Rated for 150/300 Watts) and it sounded acceptable (drawing like 4 watts), not as good as my $300 receiver, but at 3% the investment and virtually no heat or power use, it is a strong contender. Bass and Treble Boost works but is limited of course. I was going to set this up outside but got distracted and left it sitting on concrete in Florida sun for three hours, it got pretty hot. It still works, but now is makes the speakers make a weird noise when I turn it on (high-pitch low-decibel, not bad, just weird). It wasn't even on, or plugged in... Since it was $10, I don't blame the piece but want to share that experience. Ending statement - Great bargain at $10-12. Though it could power bigger speakers enough to use as a primary system, I wouldn't recommend it, but I will definitely never use a pair of "computer speakers" again, thanks to this. I'll probably buy 2 or 3 more of these for various rooms in my house... I powered my amplifier with a high quality 12v 2a Adapter I got for LED Strip Lighting.

Replaced an old DROK Micro Stereo Amplifier that I bought in 2017 that set in my garage and used hard and finally gave out. Used this as soon as I received it with in hour after being place on my doorstep. I resumed my old 12v 2 amp plug and a set of 6ohm Techicns book shelf speakers. It preformed without a hitch in our Texas 90 degree heat with no air flow on it for three days straight. It got warm to the touch but nothing to concerning and I was jamming it pretty loud. I do like the fact that I can adjust the bass and highs, and has great sound. I’m a huge SQ guy and this gets my approval. Hopefully I get 8 years out of it. May purchase their 2.1 later down the road but first need to upgrade my outdoor speakers. Really enjoying this amp and worth the 12 bucks.

This is a great little amplifier for under $10, and it works very well except for one minor annoyance that's easily fixed. I have a Kindle Fire hooked to some small speakers (through the headphone jack), and I use it to play rain sounds at night when I go to sleep. The problem is that even at full volume the output of the Kindle just isn't loud enough to hear the rain sounds very well. This little amplifier solved that problem- it's got more than enough power to play the sound as loud as I want. It's easy to hook up and works like a charm to boost the sound. THE ANNOYING FEATURE Several people have mentioned in their reviews that the amp contains a very bright LED behind the volume control, and when the amp is on it cycles through various colors. It's so bright that it would light up part of my room and the changing of the colors was also extremely annoying. If you're experiencing this problem (as others have mentioned in their reviews), there's an easy fix that you can do in about 5 minutes: 1) Unplug ALL the wires and connectors from the amp. 2) Pull the volume knob off (it just pulls straight off, no tools required). 3) Behind the volume knob is a clear plastic piece that's attached to the shaft of the volume control with a small flat nut. With a pair of pliers, gently unscrew and remove the nut. 4) Gently pull the clear plastic piece off. Behind it is the LED that is soooo annoying. 5) Take the clear plastic piece and spray paint the back side of it with some paint. Almost any color will do as long as it's not transparent. Give it a couple of good coats of paint and let it dry. 6) After it's dried, put the plastic piece back in, screw the nut back on, and press the volume control back on the shaft. That's it- problem solved. No more annoying light. :) (Alternatively you could follow the steps to #4 and then paint the LED with some nail polish or dark paint.) I hope this fix helps others. Aside from this one minor annoyance, this is a great amplifier for general use and I wholeheartedly recommend it.

This is a nice amplifier and has worked well since connecting it to my computer a few weeks ago. The sound is clean and the volume knob has nice LED lights which add to the environment when listening to music. It was simple to set up and has been simple to use.

While this unit sounds pretty great there are issues: others say it limits bass... Around 60 hz then down a few db by 50 hz. I think they are right. The tone control , esp. The treble, operates over a very limited range of the dial, basically it is all boosted up at only a eighth of a turn. But it limits like an old cheap tube amp: in a way that is good to listen to, the old adage of subtractive issues being better than additive ones being true as always here. So why only three stars? At this price it's the cheapest full integrated amp I have ever seen. I payed 4.95 or 5.95, making it almost half as cheap as the lp-808, which was the previous price champ. ( don't get me wrong, I think only a little grain and falseness make the Lepai second to this in sound. If crisp treble and bass extension matter more to you then midrange sweetness then the Lepai is the winner - I like the sound of the Lepai. And this. But...) So the but. It does in fact pop on off and on like the others say. Just as one said, with my speakers I don't THINK it's going to destroy my tweeter but more sensitive speakers - over 98db/ watt - well DO NOT TURN THIS OFF without unplugging the speaker wires first - even turning the volume down all the way won't help. I hear about Klipsch owners using this type of amp. Stay away from this one or else be super careful. I'm sure it would pop a tweeter blow it right on out if it were 99 db or so.... This is the cheapest, but the Lepai lp 2020a+ is the low price sound champ at 25$ The lp 808 is great at eight. Right now I am listening to the stellar labs portable t amp. I think it's about the same as the 2020. It has headphone jack but no tone control. It also has built in battery compartments for eight aa batts. I am using it that way now and it can drive my psb alpha b1 speakers quite quite loud. As loud and louder than I can stand (easily 101 PLUS - that's where I called quits, not the amp - db at one meter or two. )and it can drive hard to drive phones with aplomb, making it an exceptional portable headphone amp as well. Plus the built in Batt compartment neatens things for hobby uses cabins cars camping grilling whathaveyou It is thirty bucks. But if you just want a toy , buy the Lepai lp 808. Better tone control , as good , brighter sound. If you must buy this, if like me you just wanna hear it fer yer five bucks, go ahead. It's a cool amp, mostly . Just unplug the speaker wires, or be sorry. For me, that not unacceptable , but it sure sucks. 2 stars. Sound quality four stars. So three overall. BE CAREFUL.

I received an updated Kinter MA-170 with the E version PWB) (X000C4O79P mfg 13.08.06) which no longer has left and right channels reversed and is no longer inverting. This was ordered without the Zitrades power supply. In addition it has a new IC output chip (TDA 7266) which is direct coupled to the speakers rather than with capacitors. As a result, with the Treble set a maximum, there is little input to output phase distortion in the Treble region. There is no visible zero crossing error. There is still low frequency amplitude distortion. The output negative leads to the speakers cannot be shorted, and therefore some care is required if headphones are to be used. I converted my headphones to keep the return leads separate and it worked fine. The TDA 7266 is heat sinked to the side of the external case instead of the bottom (an easy way to recognize the E version), and no longer distorts (bends) the PWB as a result. The action of the tone controls is still pretty much the same as the MA-170D. Setting the treble to minimum and the Bass to slightly above minimum (the Bass control has a switch action at the lowest setting) achieves the best 1kHz square wave indicating minimal phase and amplitude distortion. Advancing the bass control achieves a room equalization resulting in a gradually decreasing amplitude response with frequency through the treble range. The MA-170E has usable frequency response and Bass Action to 4 hZ (Bass at max, Treble at min, volume about ¼), which is remarkable. You will notice the difference (with the appropriate speakers or headphones) when listening to material which is bass heavy such as the Pirates of the Caribbean. This is an improvement over the MA-170D which is capacitor coupled and has response to 17 Hz. For me the MA-170E allows low level listening with minimal irritation. Using a 1 amp 12 volt switching power supply puts noise on the output and causes the amplifier to shut down at about 4 volts peak to peak output or about 1/4 watt out RMS into 8 ohms. The power is not an issue with headphones but the noise is. Use of this amplifier with the Zitrades 12 Volt power source is recommended to minimize noise and avoid shut down.

I am not sure why this was so cheap. Its a steal and kind of overkill for my purposes. Its a very small amplifier that could fit in your pocket. I originally got it because I needed an amplifier for my electronics in sound synthesis. Just something to help tune and debug problems. I was not expecting what I ended up getting. I am an artist, writer and DIY'r. My concept of expressionism tells a story through unlike hobbies. (For those who wanted to know) . Currently I am in the process of converting a Micro Korg into a synth module. I removed the keyboard and taken the main board entirely out of its case. I was positively surprised that this small thing could put out a reasonable quality sound for its size and price. Its not meant for joy listening. At best it can be used as an improvised keyboard amplifier if you have reasonable speakers. I would not recommend 2ohms per speaker on this thing even though it says it above the speaker connectors. I am using 8ohm speakers repurposed from a really old media surround sound. It has a very reasonable amount volume for my purposes. Too low of impedance can burn out any amplifier. Think of the 2ohms as a minimum rating you want to be above. . I think my favorite part about this little thing is the RGB. Trying to think of criticism is actually difficult for the price I got this just a little under 10usd and not more than 16 or 17usd with the 1amp 12v DC wall wart. If I really had to provide a something I don't like its that the feel of the knobs/pots are not perfectly smooth. The feel not the response. I did not hear any pop noises through the speakers in my basic test I did on it. The other thing that might be important is that this thing does have a pop noise when you turn it off. Not really loud and in my opinion that is kind of expected from any instrument amplifier that is about a year old. Not sure this thing uses bypass capacitors or filter capacitors with how small it is. At the price though even if it needs repairs in the near future I would probably have gotten my money-worth out of it as a bench top test amp for my sound synthesis electronics lab. If that makes sense.

This amplifier is really good just not a big fan that it has to be plugged in but it works really good except the fact that you have to buy your own power wire and plug in wire