4.1 Channel Bluetooth 5.0 Mini Audio Amplifier Receiver, 4×50 W + Active Subwoofer SUB Jack Output – Hi‑Fi Car & Home Amplifier for Speaker

Works great have full surround sound plenty of power I only use it about halfwayup. The remote could have been range.

I had this as a replacement idea because another one (pyle marine BT one) ended up not working at all. This one is great! Good bass and the Bluetooth is really cool! Ultimately I realized I wanted to add a mixer for a few karaoke microphones and added a separate Bluetooth transmitter in the mix too. So now I have 3 microphones and a tablet input through the mixer to the transmitter, received to this unit which pushes 2 channel stereo to a pair of great 5way 6x9s and a 12 inch sub. It fills the party bus perfectly. No window shaking, no cracking or hissing.

First off, if you're an audiophile, this ain't the amp you're looking for. It's quite obviously a Class D unit, and only does mono audio via Bluetooth. BUT, if you've got a few speakers lying around and you want some sound, it does the job. It's tiny and can be hidden almost anywhere. It's especially good if you're setting up your back yard, or any other large area. Since there's no stereo output, you won't lose any panned audio in any of the speakers. It'll be the same exact sound output from all 4. Some notes: it seems like the bass and treble knobs are additive. Meaning there doesn't seem to be a way to bring the mids up. It could be my hand me down speakers being really bright, but they sounded decently flat when connected to an old school receiver. Also, the two volume knobs for the pairs of outputs are a different levels (12 o'clock and 2 o'clock) and the speakers sound like they're all at roughly the same volume. I had to get my roommate's opinion to confirm that I'm not insane, and he agrees that it all sounds centered. Could still be the craptastic speakers if somehow they're not the same impedance. They're old, but all the same model. Pretty sure that wouldn't be the issue.

Exceeded every expectation. MP3, Bluetooth, a remote, 2 speaker sets and subwoofer? I tried every one. Slipped a SD disc in FYI, it goes in bottom side up. Awesome. Pair phone and did bluetooth. Awesome.Cable connected to computer monitor for sound out. Awesome. I am getting ready to try the subwoofer. It even has preset equalizer settings via the remote. Skipped around the SD card using the remote. Way beyond in value from a product priced in the $40's. Wow.

Send it back didn't like the way it was configured sound quality was terrible on this unit

This unit works well and powers 4 Polk atrium 5 speakers well. But when I turn it on it always defaults to line input. I have to switch it to BT every time and it makes very loud beeps when switching. I may replace this unit for that reason.

Needed so eting to power some speakers in the garage. Great sounding lil amp. Very impressed

It works great