Fosi Audio ZK-1002D Mini Bluetooth Amplifier HiFi Stereo Wireless Audio Receiver Compact Power Amp 100W *2 dual channel Class D with AUX USB Inputs for Passive Speakers

Setting up front and rear bass shakers for the racing rig, so 4 channels required. As I bought the DS200i shakers, which are 100 Watts, I bought one of these amps and one NobSound, which is the recommendation on all of the youtube videos.I wasn't sure if the USB connection would act as it's own sound card, which was the only reason I didn't order 2. But pleased to say it does, no drivers needed, just appears in the audio device list for Windows.The unit is the same profile as the NobSound, but slightly longer... All the buttons seem to be good quality and it is as simple as plug and play. Note - I have not used the bluetooth connectivty, only USB.In terms of power... I connected this amp to two of the transducers and the NobSound to the other two. It is a massive difference, this amp really packs a punch, whereas the NobSound was about 30-40% of this. I guess this is not surprising, the power supply provided with this unit was 24V and 5A = 120 Watts the one supplied with the NobSound is 12V and 5A = 60 Watts. The NobSound does only declare 50W per channel.In terms of price the NobSound was £5 more that this unit... So, I will be boxing it back up, returning it to get another of these!!Great value and recommended!

Well what a great product. Easy to connect and it accepts a range of voltage so good for car, rv, boat or mains. Straightforward connection with Bluetooth. Great sound too.As you can tell I am delighted, the boats speakers handle the power far better than the old car radio.

This Amplifier is a good piece of audio hardware. It has Bluetooth connectivity plus auxiliary input and micro USB audio interface. Bear in mind you will need a audio in to RCA input to connect to another DAC.Bear in mind you need to lower the volume connected DAC to avoid distortion in bass. (Passive Amplifier connected via Headphone DAC Amp)

Using this on my simrig for tactile inducer / bass shaker.Works fine, good quality product for what I can tell.

Love the size of it as it replaces as massive old 3 disc cd player which I had lying around and wanted to make use of its speakers. It’s packs a punch !! Very loud = very good! Clear music quality

All was good to begin with, sound is decent for the size with my 6.5" ceiling speakers. Bluetooth works well (although the voice is quite annoying). I used mine with a 3.5mm cable and an old Amazon Echo. The trouble started after around 6 months in. Anytime there is silence it makes a loud buzzing pop sound! Doesn't matter if it's on bluetooth, 3.5mm aux or any of the different source devices I plugged in. It happens when you aren't using it and when there is a very quiet/silent part or gap in songs. It's so frequent I have stopped using it. Will probably use one of my old AV receivers for the time being, but it's a terrible waste of electricity just for some background music!

Sound quality is good for such a small device, but after a couple of hours use, it starts cutting out like the Bluetooth is losing range

Coupled with Dayton Audio 16ohm tactile transducers and it works a treat. Seems fairly well constructed and has its own built-in sound card which is a massive bonus.