perfect little thing with great output
926364
perfect little thing love the wireles connectes works perfect
834323
The SA-50 Amp is remarkably clean with extremely little distortion. It has plenty of power to drive 4 ohm speakers in most residential rooms. The remote control is OK for on/off, input selection and volume... It is quirky however... (pressing the "A" button will disable the Amp, you have to re-press it again to enable the Amp). The English instructions could do with some editing and rewriting.
The amp could use a red LED lamp to indicate power on... the display screen shuts off soon after any command is made.
I appreciate Its three inputs: 3.5 mm jack, USB, and micro-SD card.

  All said, this is a wonderfully small amplifier with great performance AND an astoundingly reasonable price!
2209367
This little amp is awesome!  I use it as my car audio system.  I just hooked it up to the 12v from my cigarette lighter, hooked up to my speakers, and have the RCA headphone jack to my iphone or small Walkman radio.  The light looks cool too.  Just buy it.  I'm happy and it's lasted me two months so far.
2936041
I have had this for more than 2 years now and it still works great, for what it is, a sub $100 Bluetooth amplifier.  I use it to stream Amazon Prime music from a PC in my office to 2 Definitive Tech bookshelf speakers mounted on the wall.  I also split the signal out to a Definitive Tech 8" sub-woofer.  I get great sound from such a small amp- really amazing for the $$$.  Use a free software equalizer like APO Configuration Editor and you can craft a fantastic signal from this little guy.  It's amazing that all this sound comes from such a small footprint, and a little creativity.
1580835
I needed a supply to provide power to one of my electronic devices and this unit fit my requirements exactly. It's a nice little "beefy" regulated transformer type supply that will fit any similar application very easily. It is well constructed and certainly worth the price. I would recommend it for any purpose such as this.
3667817
Amazing how well this little gizmo works.  I'm using it with an old server to have speakers.  And it even works with Ubuntu.
2620578
Bought this for my bathroom in-ceiling speakers. This is great to power two speakers for smaller solutions. I needed something compact to hide in the laundry chute and this worked out perfectly. I love the power and quality of this Class-T amplifier. I would recommend to anyone.
2363560
This is a great little reciever!  It has a nice high quality look and feel to it, and its power is far more than adequate for even high-ish level listening in most rooms (unless you're driving very low efficiency speakers in very large rooms).  Most speakers are around 85-90dB/watt efficient, so for most reasonable listening you'll likely only use 1-5 watts per channel.  I'm only mentioning this as many will likely overlook a small unit like this simply because of it's low power output compared to full size recievers.

The only reason I didn't rate this a perfect 5-star is because I feel it needs to offer an internal crossover and sub-out.  Most people will likely use a reciever such as this to power a set of bookshelf speakers, and anyone wanting full bass with such a setup will opt to use a sub.  Also, its modest power rating would mean much less if an internal high-pass crossover kept the bass frequencies from being amplified and also kept them out of the smaller bookshelf speakers.

Another nice-to-have would be an iPod docking port, but this is starting to get pushy...  I feel this unit offers quite a lot for the price.

As far as sound quality goes, I'm not a serious audiophile with tons of high end equipment to compare this too, but I do have a high end Pioneer home theater reciever and some excellent Energy Reference Connoisseur speakers (RC-70 fronts) for a reference.  Using the TEAC reciever to power a pair of Energy RC-Minis and an ESW-V8 sub (high level inputs), the sound is excellent.  I live in a townhouse so I have not pushed it too hard, but believe me there is PLENTY of power in this unit for listening.  My setup may not rival a night club in output, but that's not the intention (and it sure sounds a heck of a lot better!).

I would reccomend this reciever to anyone needing a compact unit for average listening levels.  One word of caution; the unit is quite deep, be sure to read the size specs and make sure wherever you intend to place it will have enough room.
1705868
The sound output from this little Hi-Fi is simply amazing. I couldn't be more pleased. And the setup is so simple. Highly recommended!
3081245
This little amp is great. At the high end it does start to distort and blat a bit, but it produces a lot more than you'd expect from a 9v battery.  We used it to amp a guitar at our beach wedding and it was plenty loud to overcome the background noise. I wouldn't use this if there were a lot of surf, but it was just perfect for our purposes and it keeps being great for us in the house, adding a bit of punch to sing-alongs or deck jam sessions. We got the AC adapter for it too, which is a bit more money but nice to have so you don't burn through 9v batteries.
4739290
Brilliant, usable output from a single AAA battery. I actually carry this light everyday, it is small enough to fit in a coin pocket and the knurling is pretty resistant to scratches.
There are brighter lights this size, but this works for all of my needs
778723
I am using this little amp to power a pair of outdoor speakers, with music supplied through my Apple AirPort Express router. I am far from an audiophile, so I have no idea how this thing ranks for anyone who is extremely serious about music. I'm just looking to play some tunes in my backyard at night. And for that purpose, this is absolutely perfect. The price is right, the size is minuscule, it certainly feels solid. I couldn't be happier. It just works.
4526557
this little amp works great. it was in exspensive anf puts out alot of power. i have mine hooked up to my TV and i have 6 speakers and a sub running off of this. (my sub is powerd and has two back speaker ports that run off the subs power) all in all i could not be any happier with my choice to get this. it is more them powerful enough for me and it sounds great. the annena that comes with is is not really worth a darn if you do not get good reception where you are at. i just liked mine to my tv antenna and it works great now.
1903721
I am a court reporter who works in a county courthouse where one of these takes the balanced output of a Shure mixer with 4 mics as input.  I use the line output for my recordings, and the 50w speaker output fills the courtroom, which is sometimes packed.  This little amp can, unlike most consumer hardware, actually deliver the wattage it claims, without terrible distortion.  50w is not a whole lot perhaps, but for mobile presentations, hearings, miked meetings, it is a perfect solution.  It also takes line level rca input, and the balanced xlr input can be either line or mic level apparently -- I have never tried, but it has a switch for that.  At the courthouse we use the line, and have a small mixer.

This guy weighs 11 lb, is smaller than a breadbox, but can provide decent audio for a large room full of people quite easily.  For the size, this really delivers.  Perfect for a mobile slideshow or PowerPoint.
4647614
I have a tv that I carry in and out of the house when I want to watch tv around my fire pit. I bought this amp to mount on the back of it to power a set of rock speakers (which I also bought through amazon) and this little guy does a fantastic job. I can now watch a game or movie with crystal clear quality and plenty of sound, I'm sure that if I really cranked it up I could wake the neighbors. I had it pretty loud just testing it out. Love it.
1974339
I purchased this to replace a computer speaker amplifier that I've been using with an Airport Express in the kitchen. This has been a great little amplifier for my use. It mounts under a kitchen cabinet perfectly and puts out great power.
3204996
I've only had this card for a few hours, but I'm already impressed. I had purchased this card to fit into an old Dell XPS 200 SFF that I've used solely with BOINC as a data-mining computer. I was looking to increase it's Work Unit output. However, it was a Small Form Factor computer with a mere 275W PSU, but it did have a PCI Express x16 slot. The only down side was that I only had a single slot worth of space, so I couldn't use a double slot card. Much to my delight, I found this single slot card with an impressive number of CUDA cores. So, I gave this little guy a chance.

I was concerned at first when I had read that it required a minimum 350W PSU, but after a little playing around it turned out to be a great investment. When I initially installed the card, the computer went into a boot loop (I couldn't get it to post the BIOS). This was simply because the motherboard didn't have the power that this little guy needed. After I disconnected the front 8-1 Memory Card reader from the motherboard, that gave it what I needed to power this baby up. I installed the drivers from the CD (This card is not Plug-n-Play) and then I updated to the latest drivers. After a couple of quick reboots, it was off to the BOINC client.

I'm clocking this little guy's output at roughly 45 GFLOPs. Comparably, this card is crunching about 20 times more Work Units than the Pentium D 2.8Ghz dual-core processor on the same motherboard. I am very pleased to have found something this capable that also happens to be a low-profile single slot card with a low power consumption.

The only Con I can think of is that it doesn't come with a low-profile bracket. I had to fork over a couple of bucks and buy a generic one, which isn't a big issue.

Overall, I am very pleased. I just purchased a second one for another SFF computer I use for the same purposes. I'll revise my review to include my findings for the other computer when it arrives. I apologize in advance to anyone who was looking for a review on it's Graphics Rendering capabilities, as that wasn't what I was looking for while conducting my tests.