Fosi Audio M01-BT Bluetooth 5.0 300 Watt Subwoofer Amplifier Home Theater Full-Frequency Mini Stereo Audio Hi-Fi Mono Power Amp with Bass Gain Control for Passive Subwoofer Speaker Bass Shaker

I wish it would stay in the mode you last used, otherwise great buy. I use BT mode with my laptop and some old home theater speakers.

FINALLY - An old school "RMS" power rating. 220w (RMS) at 4-ohms. Here is the kicker, it'll handle 2-Ohm loads with ease and likely over 300w at that impedance (if you run a 32v power brick). That is what I am doing and this amp will deliver.Running the two bottom Yamaha 18" cabs with this subwoofer amp. The main Bluetooth amplifier is a Fosi Audio BT-30D PRO (2.1 amplifier). I run the two top Yamaha cabs with that one.This combo is incredible and pumps out high levels of sound. In order to "really" uncork these digital chip amps -- feed them 32v. I am using two 32v AC/DC adapters on both of the amps with additional cooling (laptop computer cooling tray).This subwoofer amplifier def pushes out the power with a 32v power brick - more than I thought. I am running it with a 4-ohm load on those two Yamaha 18" subs. The amplifier never once has given up or gone into shut down mode. The "GAIN" control is kinda odd and has three click positions. It adds audible line noise, but gives this amplifier more pre-amp gain if needed (for really low SPL subwoofers to match sound levels of the main speakers)UPDATE (Jan, 2025) - Solid buy...this little amplifier is a true subwoofer amplifier with power that will surprise you. Granted, if you're into car audio and 3,000w amplifiers, this is not your thing. For everyone else, this little amp will def please. It sips power -- seriously great to just leave it on (no noise). I got another one! I like these -- can't wait for a 600w version

I have a Klipsch r-12SW that the amp just died on. Of course it is just out of warranty, so I ordered this hoping to at least get it working until I could upgrade. Little did I know that I had just upgraded. Now, to be fair, I don't know if the improvement I notice is because the included amp was slowly going bad and sound quality was going with it, or if this amp is just better. I tend to think it is the later, since the bass is noticeably tighter and less boomy than the it has ever been with this driver. I think this amp just provides a better, cleaner signal!Excellent product. Highly recommended!

I purchased this Nov 24,2024 I knew very little about compact amplifiers but I didn't want to get a big PA amplifier for my home theater in my den.The size is very compact,substantial amounts of power,I have it connected to a single 12" Memphis dvc 4 ohm subwoofer along with three other subs,1-(15") sub & 2(12") subs I have inside the den,my den is a fairly large room to accommodate this setup.I just had to balance out all of them to get an overall level of sound.I have the gain at about 10:00 on the Fosi amp,the gain knob is very strong so be careful.I just wish it came with a subsonic filter or a limiter.Your sub will move quite well. Overall the best choice I could ever make & saved me plenty of money from buying another P.A. amplifier. I'm feeling another type of sound I never thought possible.Update: I changed out the Memphis 12 subwoofer & box and switched to a NVX 12 dvc 4 sub & a Harmony Audio enclosure.I wired the NVX 12 sub to a two ohm impedance and it's not a problem for the Fosi Audio amplifier.The lower frequencies that the two ohm impedance presents is awesome in a home theater surround sound system environment.Movies,Music and Games take on a whole new life.The amplifier has been working out very well and stays cool.Great compact amplifier.Everyone should be at a lower impedance for subwoofers,treat yourself don't cheat yourself.

faulty design. didn't get to use.apparently if you have one little copper from a wire connected to the speaker positive and you accidentally touch the other side to the bare metal it starts a smoke show. would highly recommend fosi audio change the style of speaker connectors.

I am using one of these units to power a kicker comp r dual 12" subwoofer enclosure and was blown away at how much power this little box can create. I had to turn the volume to halfway and the frequency to about 1/3 from full. I am once again sending a signal to it from a yamaha receiver. This setup is in my home gym. This would be perfect for some of you wanting to add a sub to your home theater as the car audio setups can be had for cheap on facebook marketplace or even on Amazon for that matter.*UPDATE* This is the finalized setup I am using. I purchased a Fosi Audio P1 Tube Preamplifier Mini Hi-Fi Stereo Preamp 6K4 Valve Vacuum Pre-amp with Treble Bass Tone Control for Home Theater HiFi System(not for Turntable). I was able to reset the subwoofer 2 output to 0 and I am using the preamplifier to adjust the feedback volume on the MQB-1 bass shakers. You can see the settings I am using in the pictures of the preamp and the subwoofer amp. This provides plenty of clean feedback at all volume levels. The preamp gets warm but the subwoofer amp stays pretty cool to the touch unless you are listening at a high volume level playing EDM sets for 2+ hours then it will get warm to the touch. I will update this post with any other mods I make but for now I think this is the best way to run a set of these bass shakers. I am considering upgrading to the larger Q10B bass shakers in the future....I was very very hesitant to purchase this unit since trying to use the Fosi audio TB10D to power two MQB-1 Earthquake bass shakers resulted in a total failure of the unit....I decided to give it a shot since fosi audios website recommends this instead of the TB10D to power bass shakers.I was pleasantly surprised when I turned it on and had everything on the subwoofer 2 output rca signal line zeroed out and I was getting some feedback from the bass shakers with a 30hz test tone. I turned the subwoofer 2 output up to +10 and turned the volume of the fosi unit down to about 1/3rd and I was still getting amazing feedback. I am running the MQB-1 bass shakers in parallel using a banana plug 2 into 1 splitter which results in a 4 ohm load.I am still in disbelief at how much power this little box produces to power 2 500 watt bass shakers. I had a behringer A800 on order in case this setup did not work and I have canceled that order since I will not be needing it anymore. The only thing I may add is a clearpro box to get the rca line signal zeroed out from the Yamaha receiver. Other than that this setup is working perfect so far....I tested it at a fairly loud volume playing Rufus Du Sol Live from Joshua Trees 45 minute set and the fosi amp was warm to the touch. The next test is the 2 hour Camelphat 2023 live set from Creamfields (which is what ultimately blew the Fosi TB10D amp). I will report back if anything fails or goes wrong on my end but for now I think this setup will work and yes I am using the power supply that comes with the Fosi amp.If you are looking to power a set of bass shakers and have no issues adding a line driver if your rca signal level is low then I strongly suggest getting one of these units.I will update this review if anything goes wrong with it...In my photos I have included all of my settings I am using. I am using the rca output from subwoofer 2 on the yamaha receiver....