Fosi Audio TB10D 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 Sub out, 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. [Update: I chose a pair of Saiyin Passive Bookshelf Speakers, 2-Way Passive Speakers, 3.5" Woofer & Silk Horn Tweeter that are sold on Amazon. I can't say enough good things about this small desktop speaker; see my separate review of the Saiyin DS6700M 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.

Nice compact amp. This will eventually be used for outdoor speakers. I’m currently testing and breaking in the unit with my indoor setup. Easy hookup. Capable of producing loud volume and clear reproduction of my cd music. No heat generated whatsoever. Great. Thanks Fosi Audio.

This is a great compact little stereo amp. It’s well built with simple front panel controls comprising a power switch, Volume, Bass & Treble controls. Back panel has stereo RCA inputs, combo screw and banana type outputs for speaker wires and an input for the included external power supply which could be either 32v or 48v depending on whichever option picked when ordering. Sound wise it’s subjectively quite good on the usual music program material into my JR149 speakers and sub. A little background hiss but nothing really annoying. So far operating well at normal indoor listening volumes ie: plenty loud enough. Now a little technical stuff. This is a Class D amp with differential speaker outputs. That means for normal operation each speaker pair must be completely isolated. Also the black negative terminals cannot be connected together or grounded under any circumstances. Doing so will destroy the amp. Bridging the left and right outputs for more power cannot be done either. Next can this amp could actually deliver 115W into 8 ohm or 230W into 4 ohm per channel as advertised. Using an sig gen at 1Khz, output resistive loads of 8 and then 4 ohms into a differentially connect scope I was able to observe over 100v peak to peak in each case just before clipping. Great I thought, 100W and 200W RMS as advertised ! However after about 4 seconds in each case, the amp thermal protection cut in and turned the amp off. Fortunately disconnecting the power supply and letting the amp cool down restored normal operation. While doing the power tests I noticed that there was a lot of high frequency switching noise due to the Sigma/Delta PDM operation of the Class D amp. This was mainly above 20KHz so mostly inaudible but did account for the low level hiss I noticed earlier. In conclusion therefore a great value little amplifier with plenty of headroom for loud music passages. As most modern music has peaks of about 10dB above mean level, using 4 ohm speakers and the 48v PSU will allow listening to program material at 20W mean power per channel without clipping distortion. This is really very loud clean music for most venues. However cranking the volume so that all the program material clips at 200W per channel and distorts heavily will just cause the amp to shut down temporarily, much to the relief for your guests and neighbors. Operated sensibly, this amp should provide many years of listening pleasure. Recommended !

For years, I've been in the home audio/theater sound enthusiast realm after having worked for a custom home audio/video company. I've always believed that amplifiers could/should be smaller and still provide excellent sound quality. In the day when most of us use streamers and rarely use an external video source, why do we need a huge receiver, with multiple inputs, 5.1, 7.1, 12.1 outputs and a whole host of adjustments that can be made to fine tune the audio source, when all we are doing is watching Netflix on our Roku TV in the living room? Enter this little dynamo! I used it to replace my wonderful but dated Onkyo 6.1ch receiver which I was only used to power part of an old Bose Acoustimass setup (3.1- L+C+R and sub). It worked well but the receiver just takes up so much room and generates heat just being on. I deleted the center channel and use this to run L+R channels to the Acoustimass Sub module. It's just enough power to have all of this running through the Bose crossovers. I repositioned my L&R speakers to be more center and re-aimed the upper and lower halves to aim straight and cross. Since the Acoustimass system runs the sub off of the L+R inputs also, I have a full range system running from this little amp. Sounds as good as any mid-level 2.1 sound bar setup I've listened to. It's been running now for 2 evenings and it has barely gotten warm. Will be looking to get a subwoofer version (M03) of this to run my whole house subs. I use an old chrome audio adapter with a powered sub in the corner of my unfinished space along with many Google Nest speakers grouped by rooms, but being able to build 2 in floor subs in 2 separate areas will provide more coverage. I believe the M03 will fit this need perfectly! Heck, I might even by 2 or 3 if I can find more of the old Chrome audio adapters. I would highly recommend this unit to anyone looking to downsize, building a small stand alone system or even looking to make custom 'hidden' speaker setups.

I’m extremely happy with the Fosi Audio TB10D as the amplifier for my Dayton BST-1 bass shakers in my sim racing cockpit. It delivers clean, robust power that brings out tactile detail beautifully engine rumble, road bumps, and tire feedback all feel much more immersive and natural. With the right tuning in SimHub, the TB10D drives my BST-1s without distortion or overheating, even in long sessions. Setup was a breeze, the compact design fits perfectly on my rig. Build quality feels solid and reliable. If you’re adding Dayton BST-1 shakers to your sim rig and need a capable yet affordable amp, this is a great choice.

I bought this after listening to the review by Randy of the CheapAudioMan Youtube channel. He spoke highly of this amp, and I found his conclusions to be accurate. I bought this to use in my garage. I wanted a simple amp that didn't take up much space. In my garage, it's gonna get dusty...and it's going to have to compete with power tools, air filter, etc. That's not the place for mult-thousand dollar amps!! About the rated power...you have to be realistic. I know this amp says it's 600W, but it's not. Not in any practical sense, anyway. And none of the other cheap class D amps are going to be, either. The difference is that more expensive amps stay clean at or near their rated power. These cheap amps don't. They start to introduce distortion well before they get to their max power...That's not to say it's not a stout little amp...it is! But you can't compare this to a $2K+ amplifier with a rated output of a couple hundred wats, and think they're going to be equivalent! To put it in terms most folks can relate to, I'd say this amp will drive speakers to about the same level as a typical mid-level class AB receiver in the 50-70 watts per channel range. Beyond those levels, you start getting distortion that you can hear, and that can damage speakers. But that's shouldn't really discourage you...with moderately sensitive speakers, 50-70 watts is pretty darn loud! In my case, I used this amp to drive a pair of Klipsch KG2.2 speakers that I bought a while back on Ebay. KG 2.2 speakers have a sensitivity of 93db. That's a little bit higher than average, and this amp drives those speakers to very high volumes! If your speakers are less sensitive, the volume will be lower, which is the case no matter what amplifier you're using! If you're using this amp in a bedroom or small office, it's probably gonna be loud enough with any speakers you have. But if you're driving 87db speakers in an 800 square foot room, it's probably not going to get very loud. If you like to shake the walls and anger your neighbors, keep that in mind. One of the categories mentioned above is volume control, so I'll mention it. On this amp are three controls...volume, bass and treble. They all work great. Smooth controls, no static, and the tone controls add just the right amount of cut or boost to the bass and treble respectively. In my case, I set the tone controls the way I wanted them, and I put the volume control to about 75-80%, and I just leave the amp on 24/7. In normal use, I connect to the WIIM mini streamer using the app on my phone, and I control the volume that way. This works great, and gives me remote control over the volume. For the price, this thing is a steal! In fact, I'm going to buy another one, which I plan to use to power the outdoor speakers on my patio. Currently they're being driven by a very cheap JVC receiver left behind by the previous owners of my home, and I am confident this amp will do a better job than the JVC is currently doing!

I bought this to drive a set of small speakers attached to a MIDI keyboard. It sounds great and even with the small, standard power supply it’s plenty loud. This is my second Fosi amp and I’m very happy with both.

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.

love it, cant regret at all!

fantastic mini amp, sounds good no issues. Same as my overpriced amps costing 600$-1600$, believe it or not. I have compared it to those overpriced ones which I sold. Running some large vintage 8 ohm 3 way average sensitivity speakers at moderate volume levels and the sound is quite good, not 2k$ good but its diminishing returns very quickly. This replaced my 1400$ SMSL PA200 amps. Simples. On other low sensitivity speakers I don't know if they can handle it but on 87db they are fine. The treble is good up to about the 2 o'clock position then it begins to get trashy. The Bass adjustment is also good up to the 2 o'clock position after that it's too boomy and muddy. I use a Fiio J11 as the source plugged into 3.5mm jack. A subwoofer is needed as it lacks a tad in the bass range. These are not heavy hard rocking loud thumping amps but for average listening they work well. Don't go too large on the speakers you might have, around 120w is ok. For 100 clams do yourself a favor.

Excellent et très puissant, très bon son , je l’ai installé pour mettre 8 enceinte de 150 W autour de la piscine il chauffe même pas et le son est extraordinaire. si vous cherchez un ampli puissant, de très bonne qualité, à un coût très modéré, n’hésitez pas une seconde.

Nice compact little amp which works perfectly for driving a pair of ceiling-mounted Monitor Audio speakers connected to a WiiM. Can drive speakers down to 2Ω. Great value/performance combination if you don't need added extras such as a remote control. The only thing I miss is a relay input, so that the amp can be turned on or off automatically from an input source (e.g. from a WiiM or similar device), as that would be useful for situations like mine where the amp is driving built-in speakers and thus positioned out of the way in a cupboard. Also worth knowing is that the PSU that is shipped with the amplifier is large (a similar size to the amp itself).

Compré este Fosi Audio TB10D para alimentar unos altavoces pasivos y me ha dejado boquiabierto. No te dejes engañar por su tamaño pequeño; tiene una fuerza increíble y una claridad de sonido que supera a amplificadores mucho más caros y grandes. Mueve con soltura altavoces exigentes sin distorsionar. Los 600W de pico (300W por canal) se notan en la pegada del sonido. Los diales de graves (Bass) y agudos (Treble) permiten ajustar el sonido exactamente a mi gusto, algo que no todos los mini-amplificadores ofrecen. El chasis de aluminio es muy robusto, disipa bien el calor y los conectores traseros son de alta calidad, permitiendo cables de buen grosor. Si buscas mejorar el audio de tu PC o montar un sistema estéreo serio sin gastar una fortuna, este Fosi Audio es la mejor compra que puedes hacer. 100% recomendado.