Lepai LP-2020TI Hi-Fi Mini Class D Stereo Amplifier - 20W Max at 4 Ohms, 12W Max at 8 Ohms, Digital Audio Solution with Power Supply

Before picking up a couple of these little amps, I read up on the amp-classification issue and Lepy vs Lepai branding. This seller is right on top of the chatter, marketing the TI circuitry and such.It's been years since I paid close enough attention to audiophile issues, but I felt comfortable enough with the new product to order a couple. Right now I'm listening to one driving Polk Audio bookshelf speakers which I have running as background "infill" for a whole-house system running Chromecast Audio.And I'll be darned if I notice a substantial difference in sound quality in comparison with far more expensive receivers & speakers on other zones. At this price point, I have to call it a miracle. After I've given these neat little devices more of a workout, I'll come back and bump them up to five stars. If the miracle holds out. (Edit: Two months later, I now own three of these and have given two more as gifts. I also own Accuphase and McIntosh gear and though it's apostasy to say so, this one gives more bang for your buck. So: 5 Stars.)Update: A week later, so far so good. Have two of them hooked up and they never even get warm and I have cranked them a bit. Sound is still reasonably clean which is amazing at the price point. There can be a touch of shrillness in the upper midrange but since I'm usually listening to Pandora the source material can be the issue. One note: when you switch them off, there's an unpleasant transient pop delivered to your speakers--not loud enough to blow anything, but annoying nonetheless. Not enough to cut a star from the rating anyway.PS: Please note that I have made reference multiple times to this item's price. It's because that's the context within which I can refer to these amps as 'small miracles'. They're certainly not going to outperform a $1500 amp, but they'll definitely give your average $100-150 amp a run for their money. BTW, on both of my units, the bass and treble controls (as well as the balance control for that matter) work fine. HTH!

Found a pair of Polk R150 bookshelf speakers for $39, so I needed a small amp to power them. The speakers say they need 20 watts to power them, so this little amp just makes the cut. To my surprise, it really matches up well. To test it, I set them up on the dining room table and hooked the amp to the headphone jack on the Chromebook. I set the amp volume to max and bypassed the tone control then used the volume setting on the Chromebook to adjust sound level. I started a playlist on Youtube and let it play for about 4 hours. The sound was loud enough but pleasant and balanced, neither boomy or tinny. The amp stayed cool the whole time and the wall wart got only slightly warm. At full volume, you can hear a little hum if you lean in close to the speakers, but it's pretty unnoticeable if you turn it to below 70%.This is now hooked up to my TV with the speakers on stands I already had. It's a big improvement over the TV speakers and much better then any soundbar I've found for less than $100. No big deal for regular TV, but really improves streamed or disc sources. Only drawback is my TV only has direct audio out, so the remote won't control the volume. If you have a headphone jack with variable audio out, you're golden.Pretty good $69 stereo!

The amplifier works well with my speakers and was reasonably priced. I like the the ability to adjust the volume, bass and treble.

This is actually a good amplifier. If you add a small heat sink and up the power supply you can get ear bleeding loud. With the included power supply you can still get a loud amount of sound out of it before distortion. The capacitors are all rated at 25 volts so don't believe the " 30 volt " max it says on the box. I tested it on three different set of speakers with the included power supply and with a 19 volt 3 amp labtop power supply. In all three cases the sound was good and loud. It is definitely worth upgrading the power supply. Just go to the resell store and find a labtop charger with the right polarity. I seen them for only a few bucks. Also the tone controls work good but I did notice a slight decrease in over all sound quality.Pros1:cheap2: good sounding with tone controls3:wide voltage range 4.5 to 25 volts4 : decent constructionComs1: must slightly mod it by adding heat sink to get full power. I used a little heat sink that have sticking pad so I just stuck it on.2: included power supply limits the performance.3: has a click in the speakers when turned off. All in all I recommend this product. I see how it holds up

Seven years ago, I setup all my TVs with surround sound, purchasing expensive speakers, powered by an expensive Yamaha amplifier. Over the years I begin to realize that stereo sound provided all the realism I needed, plus even a minor change in setting up this system was a large effort. Stereo sound could more easily be obtained with what is called "computer speakers" if the TV has a 3.5 mm (earphone) sound output connection. Although these speakers were satisfactory, they were not capable of the volume or frequency range I enjoyed with the Yamaha, so I started a search for a simple, inexpensive amplifier for my original speakers.This Class D Stereo amplifier cost 10% the cost of the Yamaha, uses the same 3.5 mm connection as the computer speakers, so it was easy to setup. The sound volume and quality are as good as the Yamaha easily powering the my old speakers, including a passive subwoofer.Dec 2021 Update:I have now purchased 4 of these amplifiers, the last 2 after relizing I could use my TiVo remote to change sound volume. I was miss-lead when I could not change any sound on my external speaker; instead, only the sound changed on the TV's internaly speaker, and there was no turn those speakers off. I'd now rate the review at 6 stars, if I could. If your TV is like most new one where they are capable of turning off any internal speakers, you cannot go wrong with this amplifier.