Product Comparison: Polk Audio OS70 vs Polk Audio Atrium 4

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General Specifications
Polk Audio
Polk Audio
Atrium 4
About the Product
Polk Audio indoor/outdoor OS70 speakers deliver the high fidelity (Hi Fi) booming sound that brings the party to the pool or deck area year round. Designed to endure regular exposure to the elements, these practical outdoor speakers make it easy to set the perfect soundtrack for a pool party, barbecue or camping trip.
The Compact Atrium4 loudspeaker produces high fidelity sound quality anywhere you want great sound. It's small size makes it ideal for tight, out-of-way installations.
Key Specs
RMS Power
150 watts
80 watts
Number Of Speakers
What customers say about "Key Specs"
Polk Audio OS70 2-Way Indoor/Outdoor Speakers (Pair, White)
  • I’ve got 3 pairs of these in my yard and, for the money, are fantastic! I’ve had them for 3 seasons now with no issues.
  • I replaced my old outdoor speakers with these. They are simply awesome! Thank you Polk - I will buy more of your speakers.
  • This is my second set of these speakers. Loved the first so much I had to get a second for another backyard zone. Clean sound, solid build, excellent outdoor durability.
  • They are powerful enough to fill the entire yard with great sound.
  • They only lasted for about 9 months and won't work. The sound just disappeared. Got in contact with the company and they will not warranty them.
Polk Audio Atrium 4 Outdoor Speakers
  • Lots of sound for small speakers. Great quality too. Would definetly recommend to anyone. Great price. Easily powered by a 50W RMS amplifier.
  • 80 watts power handling plenty to spare in volume all you need is a decent receiver and you wont be disappointed
  • These speakers rock! Do not expect to get night club power, but the quality is great for normal level listening. the sound quality is amazing for such a small speakers. I love them!
  • Installed these on my boat with a Dual AMB600w 240 watt receiver and they can't handle the 60 watts going to them. Was pretty surprised considering their 80 watt rating.
  • Not as powerful as I had hoped for an outdoor space but quality is very good and they look great.
Size & Weight
18.5 in
8.6 in
13.9 in
5.7 in
10.9 in
6.7 in
13.7 lb.
3.6 lb.
What customers say about "Size & Weight"
Polk Audio OS70 2-Way Indoor/Outdoor Speakers (Pair, White)
  • Nice sound and volume given their relatively small size. As described, good amount of bass, too.
  • Easy to install & great sound. Sound quality is very good for the size of the speakers.
  • They are decent enough size to provide some base and not sound "tinny". Installation was relatively easy; just required a couple of tools.
  • The OS70 are a perfect size for the pack porch! Very, very great speakers and for the price, hard to beat!
  • A heavy speaker for such a small size. It can easily tear out the mounting and fall because it is heavy.
Polk Audio Atrium 4 Outdoor Speakers
  • They are the perfect size and weight for what I needed. They seem very solid and durable.
  • Great speaker for there size. Easy to mount. Overall very good deal.
  • These are a good size. I didn't want to spend the extra money on the bigger Atrium 5/6/8 and I haven't been disappointed. They fit great in the corners of my deck.
  • The sound quality is good and they have good weight, which typically indicates a quality speaker (big magnet).
  • Very easy to install and the construction appears sturdy
Min. Frequency Response
40 Hz
75 Hz
Max. Frequency Response
25 kHz
25 kHz
8 ohms
8 ohms
90 dB
89 dB
Waterproof, Rust-Proof Grille, Weather resistant polymer composite Cone, Stainless steel hardware
Speed-Lock Mounting System for easy, safe one-handed installations even in difficult locations, Anodized Aluminum Tweeter Domes
What customers say about "Audio"
Polk Audio OS70 2-Way Indoor/Outdoor Speakers (Pair, White)
  • At low volume, the separation between frequencies is outstanding and when you turn it up, the music is thumpin! And no distortion whatsoever.
  • Bass response is tight, but not over exaggerated. Bass is good, but more of a mid range shiner, vocals sound very realistic, highs are nice and clean even through MP3.
  • Great speaker for the budget we had available. Crisp sound, tight midrange, and decent bass response.
  • They offer good dynamic range and a level of response that allows me to enjoy my music while in the garden.
  • It would seem like the combo of the Polk's woofer and tweeter should be better, but the frequency response of the speakers seems similar between both speakers.
Polk Audio Atrium 4 Outdoor Speakers
  • Theses speakers reproduce high and low frequencies very nicely. Bass is solid and not boomy.
  • Mounting bracket allows for vertical or horizontal mounting with easy angle adjustment thanks to solid screw on end caps.
  • The volume is excellent, the frequency range is quiet good...and they have no problem pushing all the volume we need to the pool area.
  • Good low frequency. Flexible installation and adjustable positions as advertised.
  • While the sound from these Polk's is good, I was really expecting more from the lows and highs based on the price of these speakers. I had read that the frequency range of these isn't that great, so I should have been better prepared.
  • These speakers despite the name are quite unimpressive. they sound muddy, and do not seem to have a full range.... no real low frequency or high frequency response.
Warranty / Certifications
Manufacturer Warranty
1 year(s)
2 year(s)

Price History

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