Fosi Audio Subwoofer Amplifier Receiver 100Watt Mini Hi-Fi Digital Class D Integrated Stereo Audio Amp for Sub Bass + Power Supply TP-01

Works as advertised

Funciona perfectamente bien, alimentando 2 woofers de 10".

Got this subwoofer amp to bypass the amp component of my active subwoofer which died months ago due to a peak in voltage. My amp was those that work in "stand-by" mode, so they are always powered up somehow. Replacing the board with a new one (original) was too expensive, even more expensive than what the sub costed me in the first place, so in order to not throw the box and the woofer cone to the trash, I decided to just rewire things up in order to bypass the sub's integrated amp, so I got this GREAT little FOSI amp to power my "now passive" sub. Things worked great and my sub is now back to life, shining again. The M04 Fosi Amp is a great choice as it is POWERFUL, noiseless (at least to my ear), very small and does not generate any important heat. It comes with a power adapter, so you only need the cables to connect the input signal and the output signal to the passive subwoofer. I used the convenient "bare wire connection" to hook the modified sub to the speaker output of the Fosi Amp. Worked NICELY. Quality of the M04 Fosi AMP is VERY GOOD, in a very neat, compact and ellegant BLACK enclosure. It is definitely worth the money, which is NOT AT ALL expensive, but quality exceeds by far the amount paid for this amp. Until now, i'm really loving it.

After the research i learned i needed a SW Amp to drive my in-wall passive Subwoofer. Article after article kept mentioning Fosi. So i jumped on this model which matched the subwoofer Watt output. The instructions are bare bones but sufficient. My steps for getting the SW Amp to work with my in-wall passive SW speaker: 1. Connect my AVR's LFE out to the back of the Fosi (RCA cable) 2. Connect the Fosi to my in-wall SW (speaker wires) 3. Toggle the Fosi switch from PBTL to SUB 4. Adjust the Fosi "Sub Freq" dial to maximum so that the AVR’s bass management fully controls the crossover point, not the Fosi. 5. Adjust the Fosi "Volume" dial to halfway. 6. Plug in the Fosi power cord 7. Done.

Used this to hook up a sub to a sound system for my workout room. Works exactly as expected and I’ve had no problems. Very powerful on a Sony xplode that is probably 10 years old. Great price and great sound for such a simple piece of tech. Hooked to a boss receiver.