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.

Saw a review of this updated amplifier and decided to buy it so that I can take a vintage Kenwood receiver out of service to see about replacing capacitors in the unit's power supply and output stages. Got it with the standard 32 volt power brick. For testing hooked it up to a pair of older Infinity 8 ohm bookshelf speakers and an older Sony DVD player for CD playback. Plenty of power output, no background noise with the volume turned up and no signal. 6-1/2" woofers supplied plenty of bass with this amp in a small room and the volume and tone controls were fine, apparently fixed what people were complaining about in the previous model. Played for about an hour at a very satisfying volume level (RUSH, Working Men CD) and the unit didn't even get warm during use. This Class D amp is acceptable to me, no noticeable harshness in the sound. Very basic amp and very compact, seems to be great for a starter music system, you'll need a source like a DAC and a Wiim or turntable that has it's own preamp, The Infinitys I had bought used $60 and the Sony DVD for like $10 at a thrift store, so for around $150 it was a basic sound system that sounded pretty good. You don't have break the bank.

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 !

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’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 for the lanai by the pool. I have it hooked up to some Klipsch outdoor speakers and have it plugged into an Alexa as my source. This is a mighty little amp with the TI chip in it. It suits my needs by the pool. I have a nice audiophile system indoors so all I needed some cheap functionality and was surprised by how good it sounds. Highly recommend.

This little amp fits anywhere and sounds awesome driving a pair of vintage 8-ohm JBL bookshelf speakers in my bedroom. The sound quality is great - volume is more than enough to fill the room. Careful with the bass control - a little goes a long way. The simplicity of design means it super-easy to get setup and going with this little amp - just connect source and speakers and you're done.

Finding good sounding computer speakers that are wired not bluetooth has gotten hard to find. Lots of cheap options that sound cheap and are good if you just need sounds, but if you want music or video that doesn't sound like it's coming from a plastic box, that gets harder. I picked up a couple nice bookshelf speakers and used this to make them work with my computer. It has 4 controls: on/off, volume, base and treble. RCA connections in, and 2 speaker ports out...simple and works so well. I can play music while I'm working and the quality is incredible. Quite happy with this unit.

Worked exactly as expected…

Bought it for my bose 301 Series V. I love it, the quality and the size of the device is perfect for my work desk

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.

Was actually really blown away by this amp. It's my first time buying Class-D amplification. This thing sounds so clean and flat in general. No noise detected, no hum, no heat from the amp and I can't believe how much power comes out of this tiny thing. Treble and Bass Controls sound nice. Completely replaced my old bulky Stereo Amplifiers so I'll definitely buy another one to have for my other pair of Passive speakers. Compact, Clean simple great power amplification.

Grata sorpresa que me dió este pequeño amplificador... al menos con mis Polk Audio monitor 60 suena muy bien, compré primero el Sony str dh190 que tenía buenas opiniones pero ese sonaba hueco en los graves cómo sin cuerpo y muy chillón en los agudos aunque tenía buenos medios pero este Fosi lo hace todo bien, me tomó vários días acostumbrarme a el pero cada vez me agrada más, incluso en canciones que he escuchado mil veces antes por años ahora que las escucho por primera vez con el salen de repente sonidos que no había notado y me dejó sorprendido la potencia que tiene siendo tan pequeño en tamaño, en fin por el precio me pareció excelente.