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I have one of the smaller ones and it sounds good very good indeed and surprisingly loud (85db sensitivity), for not alot of money you can buy a soundbar, logitech,creative (pc speaker) killer
It's important to note that the rated power for all these Fosi amps is misleading. Normal power rating standards are supposed to be given as RMS, not peak, but clearly Fosi is going for peak/ideal/fluffed. In this case the power supply is 24V @ 4.5 amps, which means at 100% efficiency (which is impossible) the amp is capable of producing 108 watts total (simple volts x amps for watts). (An amp cannot send more power to the speakers than its power supply supplies.) At a typical 80% efficiency of a Class D, that's more like 86 watts, and of course it's 2-channel so that realistically means roughly 43 watts per channel.
That may still be enough for a lot of users, but I figured I'd point that out so that people knew not to be expecting 160W RMS x2, because that's never going to happen with this amp.
I have a different Fosi amp (40w with built in Bluetooth also < $100 on Amazon) in one of my setups. Works very well within its power limits with a pair of Boston A40 speakers. Would very much like to hear it with a high efficiency very easy load pair. Should compete well with way more expensive flea power tube amps I would expect. The value is top notch for sure.
I run very well reviewed 500w/ch Bel Canto ref1000m monoblocks in my main rig.
My amp has a læittle grouding problem, when i adjust the volume theres a little static noice that is gone when i touch the front when i adjust the volume.Hmmmm, what makes you think that's a grounding issue?