ZK-1002T 2.0 Channel Bluetooth 5.0 Amplifier Board 200W HiFi Subwoofer Audio AMP with Treble and Bass Control BT and AUX Inputs, DC 12-24V 2.0 Channel Stereo AMP Module for DIY Speakers

Great little amp. I will say you must be careful with the volume knob. With an 18v input, if you keep the treble and bass knobs in the middle, you can not go over 55-60% on the volume knob otherwise the amp will clip. If you go all the way on either bass or treble, you will clip around 40-45% on the volume knob. The remaining amount left on the volume knob doesn't get louder, just dirtier. All testing done with oscilloscope.With that being said, this amp will do its rated power. At 18v, I was getting around 17 volts per Channel before the amp clipped. This was playing various test tones through Bluetooth for worst case and to see how clean the Bluetooth DAC is. For a 4 ohm speaker, that is around 90 watts rms this amp was providing with a solid test tone. I am really impressed. 2 items I would recommend to the manufacturer is include a small Phillips head gain adjustment on the board so the user can set the amp gain properly. Second, include some mounting standoffs so you can screw the amp into what ever project you are working on.For the negative reviews, I believe the amp is cutting out or quit working due to clipping itself to death if the user has not tested for their application.Highly recommend if you want an all in one that has Bluetooth, wide voltage range, and EQ all built in.

I recently purchased this Bluetooth Transmitter, and I couldn't be happier with my decision! If you're considering building a stereo system, this product is a top-notch choice that won't disappoint.First off, the signal transmission is outstanding. I’ve tested it from distances of up to 175 feet, and the connection remains strong without any dropouts—truly impressive! It's perfect for those looking to enjoy music throughout a large space without the hassle of wires.I paired it with a 12-volt, 8 amp-hour battery and an Infinity speaker, and it has been playing beautifully for over 60 hours on and off! The efficiency of this transmitter is remarkable; it hardly draws any power, which means I haven’t had to charge the battery yet.Overall, I highly recommend the Woozie Bluetooth Transmitter to anyone looking to enhance their audio experience. The quality is excellent, and I’m eager to purchase more. I really hope they stick with the current design, as it’s clearly performing wonderfully!

Best bang for your buck . Great amp for making a home made blue tooth speaker setup

I primarily bought this to test speakers that I wanted to install into my vehicle. The sound it outputs doesn't include a lot of electrical noise, and it can output a good amount of power. One thing to note is that to obtain the full 100W of power, you will need to give it 24V. It will not achieve this at 9-12V of input. I didn't have an aux cord to test on this, but Bluetooth audio isn't the best quality and compression noticeably hurts the sound quality of the audio stream. This would be a cool device to drive desk speakers and make good use of the power they are capable of handling.

This thing works great! It turned my 40+ year old Yamaha NS-1000 Monitors into the coolest BlueTooth speakers ever! I have only used it a few times - so far so good.

Cheap, compact, and packs a serious punch. This pushes a pair of boat speakers super clear, with great treble and bass. highly recommend!

I purchased two of these. The first one showed no signs of Bluetooth even though I was sure I was giving it power. None of the devices saw a Bluetooth connection to it. It almost appeared DOA dead on arrival. The second one was exactly the same.Sad I was really hoping this would work. Buyer beware

Very easy to install, work well these are small so they would fit almost anywhere. As for the quality, I have only had them about a week so I will update later.