ZK-ST21 TPA3221 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 100W×2 200W, 12V-30V Audio Power Amplifier Module with Treble and Bass Control

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312Total Reviews

Amplifiers

C

Company Review Grade:

DAJUNGUO

15 Total Products

ZK-ST21 TPA3221 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 100W×2 200W, 12V-30V...

Analyzed on

Sold by DAJUNGUO

A

Fakespot review grade

A

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Pros & Cons

Update Pros and Cons

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Pros

The alitove 36v power supply 4a 144w ac/dc adapter 100~240v ac to dc 36 volt 4 amp converter 36 vdc 4a 3. I bought a voltage booster, but i don't know how to use it, it works ok without. Built a skar audio boombox this little guy with a 36v 15 amp pow... Read More

I listen to hard rock/metal, and this thing will melt your eardrums.

Good product for diy bluetooth speakers. It has dynalab 8 woofers, soundstream 1 silk dome tweeters. It's provided plenty of boom for the dayton 8 woofer.

When powering it on, it's best to already have the power plug inserted into the circuit board. Only issue is it doesn't come with an connecter for a bluetooth ant, however there is a solder spot on the board. My old,other brand unit similar would link... Read More

Ensure the 2. Lemme tell you about! No harm, no foul.

Cons

I barely get any bass out of it and its cranked up to full volume. The app is an even bigger pile that's next to useless. I have a infrared thermometer and he’ll thermometers and the unit wasn't getting hot. There are better and cheaper mini amps out ... Read More

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Highlights

The AI used to provide these results are constantly improving. These results might change.

Quality

Bluetooth range good, lots of power, doesn't get hot, respectable sound quality

Very powerful and great to build your own handmade bluetooth speaker with custom woofers and sound.

After about 20 min of a test run of impressive output it instantly volume dropped and had badly distorted output and sub channe... Read More

5mm adapter plug is inserted into the amp before applying power else a big spark may be produced.

Price

This amp is great for the price.

This amp is crazy good for the price and it powered a 12 inch square subwoofer like it was meant for it so i would definitely get it again.

1 setup you can have particularly for the price.

It would be better at39$ not 49$ and it would be better if you could individually turn down the mains like you can the bass 😁in... Read More

Competitiveness

To me is a nice feature because my "old ,other brand unit similar" would link up randomly to my phone or even my bluetooth tran... Read More

I previously had another brand 24v version using the same 2.

Overview

How are reviewers describing this item?
good, great, loud, quality and better.

Our engine has profiled the reviewer patterns and has determined that there is minimal deception involved.

Our engine has discovered that over 90% high quality reviews are present.

This product had a total of 312 reviews as of our last analysis date on Aug 23 2024.