Fosi AudioTB10D 2 Channel Stereo Amplifier, Class D Mini Power Integrated Amplifiers 600W for Passive Speakers/Bass Shaker, Home Audio Component Desktop Amp Receiver TPA3255 with Bass Treble Control

If you are considering purchasing a stereo Class D amplifier and you don't require Bluetooth, digital inputs or balanced inputs then the Fosi Audio TB10D is a great choice. The TB10D stereo amplifier, when paired with a small music streaming device such as one of the WiiM music streamers (also available on Amazon), becomes half of a shoebox sized streaming audio system. You would just need to add a pair of passive (non-amplified) speakers. The bass frequency response of the TB10D was noticeably absent when first powered on. After about a half hour of operation the bass finally showed up and all was good. I leave the TB10D powered on as the standby power draw is very low. [Update: I measured the standby power consumption of the TB10D. Plugged in, not switched on, 1.0 Watt. Switched on, no input signal, power consumption is 2.5 Watts.] Even though I know that the location of the bass and treble tone controls on the TB10D are reversed, as compared with most other amplifiers and receivers with the treble control being on the left and the bass control on the right, I routinely forget and grab the wrong tone control. The speaker binding posts are small and close together. This is not an issue as I use banana plugs when connecting the speaker wires to the TB10D. Note that there is no headphone connection on the TB10D for wired headphones. If you need a small, inexpensive good sounding headphone amplifier for wired headphones consider the Fosi Audio P2 headphone amplifier.The TB10D's available output power, ~50 Watts per channel when used with 8 ohm speakers, with the included 32V/5A power brick is adequate for use in my kitchen audio system. The case and power supply of the TB10D remained cool to the touch even after extended listening (I measured 72F). If you have a large room, lower efficiency speakers, or desire audio levels exceeding ~85dB you should consider a more powerful amplifier. You can change the supplied external power supply for one rated for 48V, however this will increase the overall cost as well as increase the operating temperature of the TB10D. Within its limitations as far as output power, input options (one pair of RCA connections, no digital inputs, no balanced inputs), outputs (one pair of stereo speakers), no Mono mode switch, no BT, no headphone connection or remote control, the Fosi Audio TB10D is a very good choice. I found the sound of the TB10D when powering 4 ohm, 6 ohm and 8 ohm speakers to be consistently smooth, full sounding and non-fatiguing with a variety of music even after prolonged listening.I assembled a complete 2-channel audio system of exceptional value that can fit in a shoe box. Each of these products is currently available on Amazon. I chose the Fosi Audio TB10D amplifier that is the subject of this review. I added the well reviewed, amazingly compact WiiM Mini music streamer. I chose a pair of desktop passive bookshelf speakers. This system is capable of filling almost any size room in a home with great sounding music. The TB10D amplifier's tone controls and the WiiM Home app's equalizer settings can be used to adjust the bass/midrange/treble output of the speakers.

Disclaimer: I know almost nothing about speakers or amps. I've been doing some composing, and all my mixing has been done with headphones, which meant I wasn't mixing well for multiple scenarios. My bro-in-law offered me some Yamaha NS10s he wasn't using anymore, and I gladly accepted them, not totally realizing I'd need an amp to power them and interface with my computer. A bit of research had me eyeing $800+ amps, and my new-to-me monitors began collecting dust stacked in the corner for a few months before I stumbled upon a forum thread suggesting Class D amps like this one (a recommendation that stirred up much controversy on the forum, as I recall).With some skepticism, I gave this a try, wondering how a $70 thing could solve a problem that my research suggested would cost hundreds or even thousands of dollars.For my use case, this works great. My computer, scoring software, and DAW recognized the unit as an audio output option the moment I flipped on the power switch. It doesn't offer much in the way of EQ controls — just volume, bass, and treble — but for my use case, that's perfect.I also REALLY appreciate that the description is so clear — it explains that the unit can handle two channels, each 150W at 8 Ohms (so if I blow out my monitors, it's not going to be because they didn't give me exactly the info I needed to make a better decision... I hope I read the NS10M specs correctly!).Build quality is surprisingly good for cost. The power switch has a nice resistance and feels very solid, knobs rotate with some nice balance of glide vs. resistance as well. The switch and simple knob layout makes it easy to use by feel, since the unit is hidden under my desk. It also provides a few interface types (RCA and banana plugs style), although I wish it had an aux jack for my headphones and a way to toggle between output destinations mechanically vs. having to disrupt software workflows to go between speakers and headphones (and that would make for 1 wire out of my laptop vs. 2, which cuts down on clutter), but can't get everything you want at this price point, I suppose!It's routed through my thunderbolt dock, so when I switch the dock from my work laptop to my computer laptop and forgot to switch the unit off, there's a mildly alarming hum, but it's probably to be expected and a good reminder to turn off the unit when I'm not using it anyway.Definitely recommend as long as you check the specs on your speakers and also don't need it to have fancy bells and whistles for your use case.