Fosi Audio TP-02 Subwoofer Amplifier Home Audio, Mini Bass Amp Mono Subwoofer Amp, with TDA7498E Chip 220W Volume and Frequency Control, for Powered Passive Subwoofers Bass Shakers

This amp was purchased to power a Dayton BST-1 Bass shaker. It does it with out a sweat. It is used on a sim racing cockpit under the pedals. It never goes over half as the rig would just vibrate to much. Perfect when using Simvibe software on PC, clean sound and very powerful. I have just got another to go under the seat, so two amps, 2 Dayton 50watt BST-1 bass shakers. Perfect combination. Would easily recommend for Bass shakers. Cannot verify for music as not tested, used for that.

I am using this as a crossover to send a bass signal to a sub that I am powering using a DJ Poweramp. Only thing missing is the HZ on the frequency dial but I played some test tones to work out where 100hz is.

The seller was helpful when asked questions. The only problem is that the seller does not have any dedicated user manual for this subwoofer amplifier. If they provide one with some technical guidance on how to set the volume level when installing will be very helpful for non-technical clients. A graduated volume knob will also be useful for setting up. Apart from this, the product performed very well and delivered an excellent sub bass sound after trial and error adjustments on listening subwoofer output together with the other surround sound speakers. Another good point is that the power supply can take the whole 120V to 230V range, 50 or 60Hz, and comes with a moulded UK plug. Recommended for use with upgrading passive subwoofers with the latest AV receivers that have only sub woofer pre-out and one does not want to do away with a good existing passive subwoofer. Recommended.

This is the second one of these little Amps I have bought. The first one was to run four base shakers in my cinema room seats. It did this perfectly on a low setting too. My main £500 subwoofer amp stopped working a couple of weeks ago and had to go off for repair. With the Christmas period coming up I didn't want to have a none working system, so a bought one of theses again as a temporary measure... Running two 12 inch subwoofer seems easy for it, the system is now putting out bass that I can't tell any difference between this little amp and my big £500 amp. It's not even stretched, it's on about 25% volume. If I knew what these little guys are capable of I would have never have invested in the expensive one. A very impressive little amp for the money.

I somehow blew the amp of my van's Edge 10" EDBA active subwoofer. Despite optimistically swapping out some capacitors it was beyond my skill to repair. It seemed a shame to throw out the whole unit, so snipped out the speaker wires from the amp circuitry and threw the circuitry away. This Fosi TP-02 subwoofer amp drives the "now passive" (4 ohm?) Edge 10" speaker nicely. The Edge speaker wires connect to the two passive sub output posts on the back of the fosi amp. I now have it installed on a home sound system. I have the volume only a "third to half" of the way up and it is more than enough thrumping bass for a 5m by 5m room using the supplied power supply... any more on the dial is overpowering despite the the amp's power (200W "max" or 150W rms at 4ohm according to manual) being much lower than the speaker unit's original active rating (250W rms)... most use cases will not need to drive the speaker at anywhere approaching its maximum capability. Unlike another reviewer, the unit I was supplied with has the two dials, one for volume and one for subwoofer frequency as shown in the product description. To my ears, feet, and chest, the amp provides the warm tones and thumping bass I'm seeking and the frequency dial is to me vital in amplifying the frequencies I want depending on the music I'm listening to. I'm no audio expert so take this all with a pinch of salt. Well pleased with the amp and salvage of a piece of kit otherwise destined for landfill.

This isn't really "220W" as delivered - the power supply it comes with is 24V, 4.5A, which is just 108W. It relies on the onboard capacitors to hit peaks of 220W, but only instantaneously. Fortunately: there is no need for a bigger PSU than this. I've used it to replace the dead 300W plate amp on a Mordaunt-Short sub, and playing infrasonic noise via MyNoise, the sub starts to produce port noise before the volume dial is maxed. So, it outperforms a pretty big box with a 10-inch driver, despite being around as big as a pocket-sized dictionary. So much less hassle than recapping dead amps from the capacitor plague era. Wiring it up is easy, the controls are foolproof, and the low-pass seems to be at the end of the audio chain so very little noise gets through even if you have it connected to something dirty like the onboard audio of a PC. Also: the manual states it'll apparently work with a 24V 10A PSU, so if you REALLY wanted, this could actually kick out even more sustained power, more than I'd imagine could be necessary for home theatre sub use - but it'd bring it up to spec to suit that 300W Dayton Audio bass exciter, if you're a sim weirdo. Attached are some photos of the internals - it's insane to me that it can do so much with so little.

Great little amplifier.... Have a old KEF subwoofer and amp had started failing. Having read about others using these Fosi amps to power subwoofers I decided to go down the same route. Made a blanking panel to cover where the KEF amp was mounted and now the subwoofer lives on!!! This amplifier is nice and compact, easy to use and easy to set up...

I was asked to take a look at my Mums sound system a couple of weeks ago, she reported a hum that made listening unbearable. I found high DC voltage on the Phono lines and traced it back to the Auna sub back plate circuit. I cut the mains to both Subs as there was high voltage to the backplate of one that gave me an electric shock! I didn't see the point in repairing the circuit, so I ordered a pair of Fosi Audio TP-02 sub amplifiers. I wasn't expecting this kind of performance. My late Father's favourite song to test HIFI systems was Tomita Golliwogs Cakewalk. My Mum requested the we put it on to test her upcycled setup, we did just that. 30 seconds in, we all got hit with emotion. There wasn't a dry eye in that living room when playing this song. All 4 of us where where ugly-crying in amazement. Thank you Fosi!!! We ended up spending all day and night re-listening to all our favourites like it was the first time we had heard them... What an amazing pairing this turned out to be. Again thank you Fosi, whatever you are doing, it's magic, please don't stop!

Impressive despite its size!

Good sound, easy to connect.

Acheté pour amplifier le son de mon ancien mais bon actif subwoofer d’une vieille radio que je comptais jeter , suis tres content du résultat.

Lo utilicé para dos butt kickers en serie, muy bien.

This little ripper replaced a home-built subwoofer theatre amplifier that kept our movies “thumping” for over 20 years. It weighed about 4 kg with a massive torroid coil transformer feeding the amplifier push-pull circuit. No matter what hubby did, he could not get rid of the low frequency hum when no input signal was coming in from the Yamaha theatre receiver sub output. Apart from that, it thumped the passive subwoofer speaker for two decades. We decided we needed a replacement for “old hummer”and chose this unit. It arrived and I was a little taken aback - it is 1/4 the size of the previous amp. I wasn’t sure what to expect. Needless to say, I need not have worried. This little unit packs a massive punch into the 8 inch, 6 Ohm subwoofer speaker and when there is no input, it is as quiet as a church mouse. Bye bye humming... We have to have the FOSI set at about 1/3 to 1/2 volume otherwise the sub overpowers the rest of the theatre sound and starts rattling our French doors leading into the theatre room. I get that it is new and you can never be assured of the longevity, but the quality from the outside looks and feels good and the output at a low volume setting is simply amazing - despite its miniature size. Clear and concise. And no idle hum. :-) Long may it stay this way!