Polk Audio Atrium 4 Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System

Big sound in a small package when paired with appropriate amplifier. Impressive and efficient!
I had been looking for an outdoor solution to have music out by our pool. After quite a bit of research I landed on the Atrium 4, My initial impression when taking them out of the box was the robust build. They were not kidding when they stated they are military grade. Although i have only had them for about a month I can attest they performed flawlessly after about two weeks of monsoon like rains, I am in Austin which was just hit by flooding.(I have them hung under our awning out of direct rain but they did get wet.) As far as options to power these I did quite a bit of diligent research looking for something that had a small form factor but could power these sufficiently. I purchased the SMSL SA50 50Wx2 TDA7492 Class D Amplifier + Power Adapter (http://www.amazon.com/gp/product/B00F0H8TOC?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00). This thing as a footprint slightly larger than a deck of cards but because of the efficiency of these speakers this amp has more than a enough power (I have yet to push this past halfway out of fear of neighbor complaints not to mention its audibly uncomfortable). For sound quality paired with this particular amp sounds as my mid range studio monitors. The definition of the highs are impressive and the lows are well balanced without being overly bassy. I have listened a variety of genres ranging from Instrumental Flamenco Guitar to Metal to Funk to Hip Hop to Banging H-Town rap and have been satisfied with all of this. We love this particular setup that we bought another pair for inside the house. For less than 200 dollars you can have a phenomenal setup. Finally have this hooked up to a Logitech Bluetooth adapter for complete wireless control of the whole systems. Now i have the flexibility to play anything I like from any music platform (Spotify, Pandora, Ipods, etc) at a fraction of what a sonos system would cost.

Pleased overall
For $100 these are some pretty good overall outdoor speakers. I had a pair of JBL outdoors that developed some buzzing and pops so I needed a replacement and I went with these. For reference, every other speaker I own (except for a pair in the garage) is JBL, this was my first Polk experience.
Generally speaking they are a solid set of speakers. They give a pretty balanced sound all around but lack a little fullness in the lower mid-range. This is particularly noticeable when playing orchestral type music like film scores or piano heavy music. Going from the lower mids to bass is where they really start to have trouble. For the size of the speaker I certainly wasn’t expecting to really “feel” bass but these do drop off noticeably in the lower frequency ranges. If there’s something to knock with the Atrium 4’s, that’s it. With other types of music (country, rock, etc…) those issues aren’t as noticeable. With that said they offer a nice high end treble sound that is pleasing to the ear. Overall the tone is brighter than I generally prefer (all of my JBL’s have a warmer tone) but it certainly isn’t a deal breaker for me. They don’t by any stretch of the imagination sound unpleasant. For our purposes, general entertaining…using them for music outside while we do yard work…, they fit the bill very nicely. For $100 I am overall satisfied with this purchase. If you can afford to, or if a flatter overall response is important, then I’d probably look at something a little more expensive. If you are comfortable giving up some sound quality or if budget is an issue then certainly gives these a serious look.
Installing these babies was an absolute breeze. The mounting hardware supplied by Polk is virtually idiot proof. It simply could not be any easier to mount these speakers. The installation deserves 5 stars. The fact that they are virtually weatherproof is also a plus, you can mount them just about anywhere without fear of damage from the elements. One other thing I really liked was the ability to swivel and aim the speakers to exactly where I wanted them (this could not be done with our JBL’s these replaced).
Power handling has not been an issue for me. I’ve got them hooked up to a 120 watt receiver and they been flawless to this point even at high volumes. We have a relatively large back yard so it takes some juice to disperse the sound and the Atriums are more than capable of taking it.
I’ll summarize this way; if you’re looking for an inexpensive way to get good quality sound outdoors with something that is ridiculously easy to install then the Atrium 4 deserves strong consideration. If you can afford to get in to an upgraded version then I would probably look in that direction solely for a better bass-lower midrange performance.

Great sound
Added these to my outside patio at my bar. Excellent sound. Looks great. Thank you.

It improves your sound 10 fold, using low levels of sound that sounds so good, and still easily having conversations with others. With out the bass, your music is louder and impedes your conversation.
I find that much of a difference!

This is my second set of Polk Audio outdoors speakers. My first pair are the Atrium 6s, which are amazing and produce very clear and accurate sound (in my humble opinion). Recognizing that the Atrium 4s are smaller, they still produce very good sound. The mounting system that both speakers use make them very easy to install and wire, and the Atrium 4s worked right out of the box with no fuss. The bass reproduction is good, but not at the same level as the Atrium 6s. Nevertheless, they are quite good at filling small to medium spaces, and they very effectively filled my lower patio area with quality sound. As an aside, these are standard speakers and are not powered so you will need an amplifier or receiver to power them. Both my Atrium 4s and 6s seem very well sealed against the weather elements and they are both holding up very well. I can definitely recommend the Atrium 4s for outdoor installations.