Excellent product!! Great performance!!!

Great value for what these are. Dont expect them to sound like Bose. Dont expect to bang kick drums thru them or use them for a PA for more than 100 people. They are killer for karaoke/solo/duo players with tracks on a boat, beach, deck or in the middle of a field. They arent made for rap, hard rock, metal, EDM. Like Bose gear? they will need a padded bag or roadcase for protection. These arent junk. Just need to use them properly for the right situation. Good to have some common sense engineering skills too? roll the muck out of your inputs, keep bottom end to a minimum and they will perform nicely.

I'm a beginner busker and need clear backing tracks to sound good, so this review only addresses the Bluetooth sounds from the D3 and refurbished S1 that I had side-by-side in my living room. D3 has similar form and slightly better stats than the S1, seems well-built and does play louder. But the BT music was often muddy or harsh, and there was no way I knew to EQ the BT sound to improve it. Some D3 sounds were similar to the S1, and the D3 handled rock as well as the S1. But overall, and especially for nuanced vocals and isolated instruments, I preferred the sound clarity from the S1 even at the much higher price. The D3 also lacks an exchangeable battery, which would seem to limit its portable functionality to one battery lifetime.

These D3 Portable/Rechargeable PA speakers might simply ?not be worth in US dollars what they weigh. I bought a pair of them with hopes that they might be okay?not great?just at least "okay." They were not.
I like Monoprice! I've bought MANY products from the company over the years, and I've been satisfied with all of them (until these).
I am a professional musician and former commercial recording studio owner with nearly 50 years experience. I produced live broadcast radio jazz concert shows, recorded bands, tweaked countless house PAs for my own gigs, and listened to (and owned) more studio monitors than I can remember, and built 10 to 15 guitar amps from scratch. Point is?I love sound! Just love it!
I unboxed these Monoprice amps and proceeded to hook up a stereo feed from the computer multitrack interface, and then also a feed from my recording studio pedal board. I listened to the results with the battery only power and with AC power connected. I waited for the internal batteries to fully charge then listened again.
The first thing I noticed was the upper mids and high freqs were VERY lacking. And I was ready for them to sound like inexpensive PA speakers?but what I heard surprised me! It was as if they did not have a tweeter at all. Then I turned the volume up a bit to see where the low end was at? the bass freqs were just boomy mush! Even at medium volume on the built in mixer the low end was completely unusable. And the overall volume available was far less than 60WATTS should be able to produce. I really don't know how to describe the overall sound. It was unlike anything I am familiar with.

Let me say?I have no joy in leaving this review. In fact I put this off for weeks (also waiting to be sure my refund was processed). But I can't leave this gone unsaid. If you want to give them a try, I understand. They seem like a nice combination of features. But notice that the user manual hasn't even included information about recharging the internal battery?this alone might show the lack of care in design. The information about the product does not even say what the speaker drivers are. The woofer was a 5.5" or maybe 6"? I had them boxed back up before I thought to even try to measure. ?and like I said?. I love messing with sound gear and listening to equipment make sound.

IMHO these are not worth your time. Look elsewhere?.

The unit looks very good as a good physical copy of a well known speaker. Unfortunately that's where the comparison ends. The 120 watt RMS claim is not even close. This unit would never work as a solo guitar/vocal unit even in a small coffee house atmosphere. turning up to get a required volume cause maximum breakup both for vocals and instrument. For blue-tooth music for a house party it would probably be ok. Unfortunately, I currently have mine up for sale.

It?s a great value. Wish it had tone control on the Bluetooth channel because highs need a little bump in certain scenarios. Otherwise, it?s a great addition to my wedding ceremony setup.

Pro: This is a great, small, very portable power speaker. It provides a lot of function and the speaker cabin looks great and is very well built. Cons: The volume buttons look and feel cheap. (not high quality). The unit provide barely enough volume (loudness) in open areas.