S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS)

This is probably the 10th "Class D" amplifier card I've bought on Amazon. Being a 3rd generation woodworker, I like to install them into hardwood cigar boxes and put them up For Sale when complete. I even installed one into one of those junky little "Bass Cannon" 15-watt-glorified-toilet-paper-tubes. It isn't junky anymore. IT CRANKS, just like the others. I find that each one is a new "puzzle" in and of itself.I've got a very nice cigar box and a 200 watt unit hooked to this laptop, driving 2 SONY SS-ZX66i BIG bookshelf speakers, and a BOSS 10" DVC subwoofer wired down to 2 ohms, and mounted passively in a downfiring Klipsch box. Some may scream "BLASPHEMY", but the Klipsch speaker was wrecked, and the amp plate was blackened...UPDATE: The two pictures above are the cigar box I mentioned, after removing the 200W board, and modifying the faceplate to fit the new 500W board... I designed the labels myself, printed them on my laser printer, cut them out with a sharp scissors (14 attempts to satisfy my OCD), and glued them in place... It was tough, as this board is bigger than the old one in every direction... I had to modify all my previous wiring to make it fit the back side... It was another GREAT puzzle...So......a few weeks ago, "540 Watts" jumped off the Amazon page and bit me. Could it be true?? I thought about it, did some homework, and finally bought one to try it out. Lemme tell all of you: "They" got it RIGHT when "they" designed this little beast of an amplifier, whoever "they" are. This thing is SOOPER LOUD!!! I'm talkin' BLOW THE ROOF OFF loud. And that was using a 24VDC 2A power brick. My 36V 9A MeanWell power supply is on the way.-------------------------UPDATE: Getting the MeanWell 36VDC power supply from Amazon was like getting a shark to hold still while pulling it's teeth out... But it finally arrived... Lemme tell you about !! W-O-W !! What a ride!! I think I broke a different kind of sound barrier than planes. This amplifier is insanely LOUD, and clear sounding, when you get it dialed in to your taste. I listen to Hard Rock/Metal, and this thing will melt your eardrums. I can't pinpoint what 500 watts actually sounds like, But, it's gotta be close. It's infinitely louder than all the other 200 watt boards I've bought in the past.-------------------------When I opened the box, it was very well packed in plastic bags and bubble wrap. You have to mount the top and bottom panels onto the amp card, using stand-offs. That's all the assembly there is. I hot-glued the 2 capacitors down, 'cuz they were, well, just not glued down. And I removed the fan/heatsink and repasted the 2 main chips with Arctic MX-4 thermal compound, instead of Chinese toothpaste.It's rather clear sounding, but not the best I've ever heard. But there's ALOT of variables that define "clear" sound. It's not all about the amp itself. The speakers, the subwoofer, the wiring, and the room shape & furniture all play a role in that definition. Hook up junky speakers to it, and you'll get a junky sound. Drive it with 2 amperes, and it'll be cutting out every time you hit the volume or bass. Just like anything else, what you put into it will determine what you get out of it. This new amp may very well replace my first 200 watt amp, described above. UPDATE: IT HAS...160 watts X 2 (L & R) + 220 watts (Subwoofer) = 540 watts. Now, I know those are PEAK numbers, not RMS. But I'll bet this amp will do every bit of 350 watts solid with the right hardware hooked to it. I found a PEAK->RMS formula that said "...multiply the PEAK wattage by 0.707 to get an approximate RMS wattage..." I don't know how accurate the formula is, but I came up with 380 watts. It's hooked to a pair of large SONY 4 ohm bookshelf speakers, and a BOSS 10" DVC 4 ohm subwoofer, wired down to 2 ohms or less. I can work with the 380 watt estimate. It is SO loud, my dogs got up and walked out of the room. My subwoofer "dances" across the floor. My neighbor called me asking if they opened the Club downstairs early. A friend asked me what I was gonna use it for. I said, "1) disturbing the peace, 2) rattling my windows, 3) melting my eardrums, and 4) taking over the world... MUAHUAHAHAHAHA".For those of you who like it LOUD, and already have or will buy a MEANWELL 36VDC power supply, GET YOU ONE OF THESE BAD BOYS, and CRANK IT UP. For mobile use, a DeWalt 20VMAX 3Ah or 5Ah battery works GREAT, although you won't get the 500 watts out of it. You should definetly use a multi-meter to test the voltage proposed. Anything over 36 volts may cause problems, up to and including failure.BUY ONE, YOU WON'T REGRET IT, UNLESS YOU CAUSE YOURSELF PERMANENT DEAFNESS...AND YET, ANOTHER UPDATE, 1 YEAR LATER:Well, it took me a year, but I did it now... I can only make a presumption about the cause, but I've BLOWN IT OUT... I blew out the subwoofer chip - see the 3rd pic above... Oh well, snot happens... EZ-COME-EZ-GO [Tesla]... My presumption is that having a big 10" dual voice coil subwoofer wired down to 2 ohms (or less) is the most-likely culprit... So, I'm gonna buy another one... And if it lasts me a year, it'll be all good... I'm not really bothered by it, because it has rattled my eardrums and my windows very nicely for the last year, and I know another one will do the same... No harm, No foul...Good Day!!!

The S220HS 2.1 Channel Bluetooth Power Amplifier Board is an absolute gem! Its small form factor makes it perfect for compact setups, yet it packs an incredible punch in terms of performance. At such a reasonable price, this amplifier is truly a fantastic value for money.The sound quality is exceptional, especially when paired with a subwoofer—it easily outperforms many expensive mainstream brands. The bass response and clarity are phenomenal, delivering a rich and immersive audio experience. Just be sure to use a high-quality power supply to unlock its full potential.What impressed me the most is the stellar customer support. I had a few questions about the setup, and the team responded immediately with clear and helpful advice. Their dedication to customer satisfaction is commendable.If you're looking for a high-performance, affordable amplifier board, the S220HS is a no-brainer. Highly recommended!

Solid amplifier for my DIY boom box. Be sure to get a power supply that gives the amplifier more than enough volts and current so the amplifier won't struggle to give your speakers full power. The fan to keep the processor cool kicks on immediately and is very quiet. It's provided plenty of boom for the Dayton 8" woofer, 3 inch full range and 1-1/8 inch tweeters. BT has decent range. Very pleased with its performance.

Well I wired it up after I upgraded the subwoofer to a 8" recoil echo subwoofer and a 36v switching power supply in my boombox along with this amp. It has dynalab 8" woofers, soundstream 1" silk dome tweeters. I previously had another brand 24v version using the same 2.1 amplifier chip with 24v power supply and a 8" goldwood subwoofer, it all worked decent but amp seemed slightly underpoweredespecially on the sub channel and that goldwood sub was kinda weak and the amps Bluetooth was super glitchy. The new sub, amp and power supply transformed it into a cranking unit with killer bass all 3 drivers were flexing big-time very impressive while sounding clean. Only issue is I didn't notice I ordered a dual 4 subwoofer until I received it so I rolled the dice and wired it to 2 ohms in hopes for bit more output even tho the amp listed only 4 and 8 I just hoped it would be 2 ohms stable. Well I'm guessing it is not... After about 20 min of a test run of impressive output it instantly volume dropped and had badly distorted output and sub channel died, sooooo I'd say something in the amp popped. Woops I wish I had just wired it to 8 (seems 4 ohm final impedance is not possible with a dual 4 coil unless only use one side of the coil) but I ordered a 2nd hopefully that will fix the problem seems the power supply still shows 36v so its likely fine. I can say I really liked how much better the function/volume switch works than previous amps volume knob that pushed in for function. I was pleased how fast The Bluetooth linked. I'm pretty sure the 36v wattage ratings are very optimistic but I haven't clamped it so I don't actually know for sure but over inflated wattage ratings is very common with budget Chinese amps these days but even so it seemed fairly powerful and pushed 3 8" drivers no problem.so it's a good unit as far as I can see but I guess don't wire it below 4 ohms or it will likely pop and end up a paper weight. The problem likely being knowingly running a 2 ohm sub on a 4 ohm stable amp is why I didn't try to return it it's not the amps fault. Now the new unit will be the test if it holds up on a 8ohm sub I'll give it a good review but it it pops too I will definitely ask for my money back on the 2nd unit.

My pontoon boat had no music, but now it does! I wired this to 4 speakers and a sub, and it goes louder than I even need it too. I mounted it under the console to be out of the weather. I use it with streaming music services via bluetooth from my phone.The push button main knob lets you adjust volume, start play, stop, and skip tracks, without needing to take out your phone at all. A great addition to a boat.