Fosi Audio M04 Subwoofer Power Amplifier

Not using to drive sub. I am about 8 ft away and can adjust volume loud until it is annoying or uncomfortable. It works for my application. It would also work for computer. If you are 12 ft away and want to drive sub or music ,I would suggest saving up a little more $ and getting something else more powerful.
Especially if driving 8 ohm speaker.

complimenti a Fosi per la veloce spedizione, l'imballaggio ed il prodotto conforme alla descrizione. Ho usato l'amplificatore per sostituire la piastra di un subwoofer attivo che si è danneggiata. L'M04 pilota con facilità il woofer da 25 cm con impedenza misurata di 3,5 ohm con un controllo del volume che al massimo metto a metà corsa. I bassi sono bene regolati ed escono con potenza e precisione. Sono contento dell'acquisto anche perchè è facile da collegare e da usare e non scalda. Grazie Fosi - ottimo prodotto.

I needed a sub pre-amp for a basic home audio setup, and after some research, this seemed to offer the best value with the right inputs & outputs. Nothing else really came close.
Very happy with it so far, the bookshelf speakers already sound better for not having to process the low frequencies.

This is a great little 100w home theater sub amplifier. It is always left on and hasn't been turned off in 3+ years and it hasn't skipped a beat, literally. I hooked it up to a Logitech 165w Sub woofer that used to have its own built in amplifier, but the speakers that connected to the Sub to control it weren't included. This little amplifier and Sub work great together and sound amazing, it rattles my living room! The adjuster nob for frequency is a must have and the fact that it has an option to run a sub or a regular speaker is great. I set it to sub and adjusted the frequency to about 90, about half of its capabilities and it hits the low lows and everything in-between, it sounds amazing. It powers this 165w sub perfectly. I love the theater sound I get when watching movies and listening to music? Wow. Was definitely worth the price, I love it. You won't regret buying it. 3 years I've left it powered on and still going strong. What a buy. FOSI makes quality, the thing is built really well and it feels made well, it has some solid weight to it. Really built well. I found my brand and I know who to go to in the future. Thank you Fosi for making such a great product. 👍 100 🌟 🤩

M4 was just what I needed.
Good little amp.