Product Comparison: Polk Audio S55 vs Polk Audio RTI A5

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General Specifications
Polk Audio
Polk Audio
About the Product
Built to bring the big surround sound theater and music experience into the comfort of your living room, the Polk signature S55 tower speaker continues in the Polk tradition of American HiFi.
The RTiA5 is the most compact tower speaker in the RTiA Series. With two 6 1/2-inch Dynamic Balance® mid/woofer drivers, a 1-inch Dynamic Balance dome tweeter and PowerPort® Plus, it packs a punch and delivers the mind bending thrills of Inception as well as the intoxicating groove of Manu Chao.
Key Specs
Power RMS
20 watts
20 watts
90 dB
90 dB
8 ohms
8 ohms
Size & Weight
41.5 in.
40.25 in.
11.7 in.
8.44 in.
12.5 in.
15.75 in.
44 lbs.
45 lbs.
What customers say about "Size & Weight"
Polk Audio S55 Signature Series Floor Standing Speaker
  • They are well constructed. they have a good weight to them that keeps them stable and transfers the bass to the floor. the cabinet construction is solid.
  • They look beautiful and very heavy. Can handle anything you throw at them.
  • Yep, they’re big. I’ve had them for 10 months now and they are good speakers.
  • The speakers are big and heavy but the sound quality justifies buying these.
  • Speakers are tall, are of good quality and look good in the room I have set up.
Polk Audio RTI A5 Floorstanding Speaker (Single, Cherry)
  • These speakers are made from real wood and are very heavy. Very good quality speakers.
  • The driver’s are a long throw heavy speaker design. They Perform way above their price point!!
  • These speakers are beautiful, heavy and they sound awesome.
  • Nice, heavy, beautiful speaker. Serious sounds and sexy box!!
  • I can only add that these guys are heavy! Not easy to move around, but that is in part what makes them such fantastic speakers.
Peak Power
200 watts
250 watts
Min. Frequency Response
32 Hz
30 Hz
Max. Frequency Response
40 kHz
27 kHz
Number Of Tweeters
Tweeter Size
1 in.
1 in.
Number Of Woofers
Woofer Size
6.5 in.
6.5 in.
What customers say about "Audio"
Polk Audio S55 Signature Series Floor Standing Speaker
  • The sound is super clean at loud volumes. Easily fills up a mid size living room.
  • These speakers really sound great. I am running them bi-amped and they really have impressed me.
  • These polks are well made, perform extremely well and do so effortlessly, with clarity in the highs, more and bass that is tight and powerful.
  • The soundstage has depth, instruments have accurate pitch and tone, while voices have immense clarity and timbre.
  • They can handle jazz, hip hop, rap and Pop with equal agility and no sign of any lacking.
Polk Audio RTI A5 Floorstanding Speaker (Single, Cherry)
  • The A5s are easy to drive with my 75 watt rms receiver. I was afraid that they might be too much speaker for my 200 sq foot apartment living room and overwhelm it. This is not the case.
  • I paired these with a BIC F-12 sub and couldn't be happier. This setup sounds amazing, shakes the walls and has fantastic clarity.
  • Bought these as my front channels, hooked to a Onkyo Receiver, and Polk RTI series finishing out my other channels. I was blown away by the sound quality.
  • I love these speakers. They sound great for music and A/V.
  • It seems like sound is coming from the center channel it's so good. Music sounds better than ever, I'm hearing things in songs I never knew were there.
Tweeter Material
Silk polymer composite
Woofer Material
Polymer/mica composite
Exclusive Polk Power Port technology, Polk Dynamic Balance Designed Acoustic Array, High-Resolution Audio Performance, American Modern Styling
Dual binding posts allow bi-amp or bi-wire connections, Acoustic Resonance Control® (ARC) port technology, PowerPort, Computer-modeled anti-diffraction grilles, The RTiA Cascade Tapered Crossover
What customers say about "Features"
Polk Audio S55 Signature Series Floor Standing Speaker
  • Sound is clear and tight. Washed black walnut looks fantastic.
  • The build quality and fit and finish are top notch too. You need these!
  • Can't tell you how great these speakers are, sound is so good, the look, with or without cover grills, will fit into your Theater.
  • I found the woofers' color did not look the same as the picture suggests.
  • People who are looking for good sound and nice looking piece of furniture combined in the speakers may be unsatisfied.
Polk Audio RTI A5 Floorstanding Speaker (Single, Cherry)
  • Great looks & great sound, what more could you want?!
  • The cherry finish is stunning!! If you can find these below retail, go for it!
  • These are so good sounding & looking I'm adding a second pair as front wides to replace the A3s I have!!
  • Awesome! Sound great and are beautiful to look at. Very pleased.
  • Great speaker, the sound quality and cabinet finish are definite improvements over the TSI/TSx line from Polk.
Warranty / Certifications
Manufacturer Warranty
5 year(s)
5 year(s)
Other Information

Other reviews