Fosi BT30D-S Bluetooth 5.0 Receiver Amplifier 2.1 Channel Hi-Fi Stereo Audio Class D Integrated Amp - 50W x2+100W, Perfect for Home Outdoor Passive Speakers/Powered Subwoofer Review

Simple connection, simple operation. I took an old Bose 101 and an old passive woofer and built a solid Cheal Garage sound system by hooking it up to an old Sonos Connect...great sound and reuse of old components in this small and reasonably powerful receiver. Loud enough and good basic performance.

Sounds great, easy connection and very compact. The only problem is the Bluetooth range. Put this in my garage with some Klipsch bookshelves. This system is incredible. The only complaint is that I can't move the phone more than 10 feet from the amp without the signal dropping. not a deal breaker, but definitely not ideal.

It's hard to believe that a small amp can produce such an amazing sound. My setup consists of (2 Bose 501 outdoor speakers and a passive Bose subwoofer). I installed it on my porch/porch and use my phone to stream music and control the volume. Also very happy with the Bluetooth distance, so about 50 feet from the unit. Love the separate adjustment knobs. Only negative: I have to turn the amp on and off manually, not the biggy.

This tiny amp was paired with a pair of vintage Polk Atrium45 speakers and subwoofer output with a 10" Velodyne subwoofer. Bluetooth simply connects to your phone to play some ringtones. With Bass & Treble on medium settings, the sound was crisp, clear in the mids and highs, but with booming, heavy bass. Bass adjustment did little to reduce boominess. I had to adjust the volume on the back of the Velodyne. Bluetooth range was acceptable for most upstairs rooms, but not with the wide range of…

I was going to use this as part of a PC speaker setup and it sounded great, but I can't use it due to the very loud static that occurs when there's no sound playing . I tested it with two different speaker sets (Polk and Sony) and a subwoofer (and no subwoofer connected) with the line in completely disabled - no cable was connected to R IN/L IN at all. Since the unit still sounds good for the price, I'm going to keep it for myself and rebuild it for use in my garage. I don't care about idle…

I have been using this Fosi amplifier for several days and I will share my first opinion. Build quality is excellent, although the rear connections are tight, but this is still a small amp. For some reason I have to re-pair Bluetooth every time the amp turns on and one day Windows wouldn't let me turn it off. I don't know if it's a problem with the amp or windows. After connecting, the Bluetooth works stably. The sound quality is good without a subwoofer but amazing with it. If you don't…