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Polk Audio RTi A9

Floor-standing speaker (Cherry)

132 Reviews | 7 questions - 18 answers

Item # 107RTIA9C

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Our take on the Polk Audio RTi A9

Meet the flagship speaker in Polk's newly redesigned RTi Series. The RTi A9 floor-standing tower speaker combines a handsome, real wood veneer finish with the kind of performance that pleases even critical listeners.

Audiophile-quality sound from a great-looking tower 

Polk Audio RTi A9 Tower Speaker

Enjoy exceptional performance with Polk's RTi A9 tower speakers (shown in black)

Meet the flagship speaker in Polk's newly redesigned RTi Series. The RTi A9 floor-standing tower speaker combines a handsome, real wood veneer finish with the kind of performance that pleases even critical listeners.

This speaker's carefully designed drivers undergo laser testing to help identify and eliminate resonance points, ensuring smooth, accurate response. Its asymmetric cabinet helps it deliver rich, clear sound by combating vibration and increasing rigidity.

The A9 also includes Polk's exclusive PowerPort® technology that reduces noisy air turbulence and increases low-frequency output. You'll enjoy clear highs, rich bass, and open, natural-sounding midrange.

Additional high-end features

Two sets of gold-plated five-way binding posts let you biamp or biwire the RTi A9 for the best possible sound. An anti-diffraction grille helps it deliver a large, three-dimensional soundstage with pinpoint-accurate stereo imaging. Adjustable spikes provide stability on both carpeted and hardwood floors.

Complete your surround system

For best performance, pair the RTi A9 towers with our recommended center channel speaker: Polk CSi A6  and surround speakers: Polk RTi A3 or FXi A6.

Product Highlights:

  • video-shielded
  • bass-reflex (ported) design
  • frequency response 30-26,000 Hz (-3dB)
  • handles 50-500 watts
  • 1" Dynamic Balance® silk/polymer tweeter
  • two 5-1/4" Dynamic Balance polymer composite midrange drivers
  • three 7" Dynamic Balance polymer composite woofers
  • PowerPort Plus technology improves bass response without introducing distortion
  • 8-ohm impedance
  • sensitivity 90 dB
  • dual 5-way binding post terminals
  • real wood veneer finish
  • 10-11/16"W x 48-1/16"H x 21-1/2"D
  • warranty: 5 years
  • Our 60-day money-back guarantee
Priced individually

    What's in the Box:

    • Cherry floor-standing speaker
    • Detachable black cloth grille
    • 4 Screw-on spike feet
    • Owner's Manual
    • Online registration sheet
    • Polk Audio product brochure

    Polk Audio RTi A9 Reviews

    Average Customer Review(s):

    (132 Reviews)
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    Hands-on research

    Features and Specs

    Enclosure Bass Reflex
    Finish Real wood veneer
    Color Cherry
    Tweeter Dome
    Tweeter Size (inches) 1
    Midrange Size (inches) 5.25
    Woofer Size (inches) 7
    Woofer Composition Polymer composite
    Woofer Surround Butyl Rubber
    Built-in Powered Sub No
    Video-Shielded Yes
    Connector Type 5-way post
    Bi-amp Inputs Yes
    Parts Warranty 5 Years
    Labor Warranty 5 Years
    Power Range 50-500
    Frequency Response 30-26k Hz
    Sensitivity 90 dB
    Impedance (Ohms) 8
    Subwoofer Amp Power ---
    Height (inches) 48-1/16
    Width (inches) 10-11/16
    Depth (inches) 21-1/2
    Weight 75 lbs

    Product Research

    Driver Technology
    Enclosure Design
    Mounting Options

    Driver Technology

    Dynamic Balance: Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance. Eliminating resonance in speakers results in a wide, smooth response and low distortion.

    Polymer Composite Woofers: The speaker features three 7" polymer composite woofers. Three 7" woofers have the surface area of a single large woofer with the low mass and acceleration of small woofers, resulting in tighter, more accurate bass response. Each woofer uses a butyl rubber surround.

    Polymer Composite Midranges: The speaker has two 5-1/4" polymer composite midranges for smooth wide-range response with low distortion. For high performance durability, each midrange uses a butyl rubber surround.

    Silk/Polymer Tweeter: The speaker has a single 1" silk/polymer dome tweeter that provides clear, detailed highs. The tweeter features mylar bypass capacitors in the crossovers to extend high frequency response and improve detail and transparency. The tweeter also features low viscosity ferro-fluid cooling with a heat sink on the Neodymium magnet for superior heat dissipation, power handling and reliability.

    Magnetically Shielded: The speakers are magnetically shielded, allowing you to place them near your television without distorting the picture.

    Enclosure Design

    Damped Asymmetric Hex Laminate (DAHLI) Cabinet Design: All-MDF construction with massive asymmetric cabinet bracing ensures a resonance-free enclosure for accurate sound. The asymmetric design is made from a 6-layer laminate with 5 viscous layers to create the optimal shear damping (OSD) system. The elegant styling aside, curved cabinets not only result in a stronger, more rigid and acoustically inert enclosure, but the curved walls also produce less audible coloration from panel resonances.

    Power Port Venting System: The speaker has a rear-firing Power Port venting system built into its back plate for precise deep bass response from the floor-standing speaker's three 7" polymer composite woofers. This venting system allows air velocity to slow gradually, vastly reducing air turbulence, and delivering greater bass efficiency than conventional ports.

    Note: The two 5-1/4" midrange drivers feature a sealed cabinet.

    Anti-Diffraction Grilles: The floating anti-diffraction grilles minimize grille diffraction for spacious, 3-dimensional imaging.


    Dual 5-Way Binding Posts: The speaker has two sets of gold-plated 5-way binding posts connected by gold-plated jumpers. Using the dual 5-way binding posts, you can bi-amp or bi-wire the speakers.

    Mounting Options

    Adjustable Leveling Spike Feet: The adjustable leveling spike feet that can be screwed onto the bottom of the speaker's attached base provide stability on any type of flooring. The spike feet adds approximately 0.875" to the speaker's overall height when screwed all the way in.

    Specifications & Dimensions

    Frequency Response: The overall frequency response is 18Hz-27kHz and the -3dB frequency response is 30-26kHz.

    Width: The main body of the speaker is 8.6875" wide but the speakers attached feet extend beyond each side of the speaker, giving the speaker and overall width of 10.6875".

    Our Product Research Team

    At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

    Staff Reviews

    Product reviews from the Crutchfield Labs

    Almost Perfect

    Written by James, IT Programmer/Analyst 2, on 6/26/2012 10:18:00 AM

    Let me start by saying I love these loudspeakers, they sound GREAT! I've used the Polk RTi A9's as my main left and right for about a year, and after a short break-in period they really came out. Music sounds fantastic. The sound stage sets the musicians realistically. They're very clear and concise, I've heard more detail from my CDs than ever before.

    I use my A9's mostly for home theater and they shine with matched speakers. Mine are set up with the voice-matched CSI A6 center and FXI A6 surrounds. The effects seamlessly envelope me. I like my movie sound loud and detailed, so I'm in it. These do that job superbly. Did I say I loved these speakers yet?

    As many customer reviews have also stated, the A9's need power. A lot of power. They still sounded good when I drove them off of a 7.1 Onkyo receiver at 110 watts, but the lows suffered some. When I bi-amped them the lows came out and really started to hit. I think these speakers would gain even more from more power and a separate powerful amp (they can take 500 watts!).

    The cabinets are very nice and the cherry color blends in well in my living room. These speakers are big, they do have a dominating presence which I love but, unfortunately, my wife doesn't. They are also very heavy, so moving them around is kind of a pain, but it's a good sign of the quality of their build.

    Positives: Clear, detailed, loud.

    Not So Positives: Wife appreciation factor, need a whole lot of power to make them really shine.

    What are the Labs?
    Q & A

    Customer Q&A

    Crutchfield asked  
    Why did you buy this?

    part of the home theater surround system [ Magdiel  Nov 13, 2018 ]
    Great reviews [ Neal  Aug 15, 2018 ]
    recommended by your chat dude [ Brian  Jul 31, 2018 ]
    I did a live chat with Adam who is obviously knowledgable and passionate about great sound and let him know my main use for the speakers was for movies and the type of receiver I had. I was deciding between this Polk and a comparable Klipsch. Adam?s explanation of the Pros and Cons of both led me to choose this Polk. Mahalo nui Crutchfield for the consistently awesome customer service! [ Michael  Jun 28, 2018 ]
    Looks beautiful and very good reviews. Hopefully the reviews are true. Haha [ Nhut  Jun 24, 2018 ]
    Great Price and Jenny helped me make my decision. Very happy with the customer service! [ Scott  May 19, 2018 ]
    Because my friend recommended them [ Jacob  May 14, 2018 ]
    Review ratings and the sound quality I believe will satiate my needs. [ Thomas  Apr 27, 2018 ]
    This pair are my 7th and 8th A9s. I just want to have an all A9 HT setup. Well except for Atmos. [ BRIAN S  Apr 07, 2018 ]
    Reviews and price [ Chad  Apr 04, 2018 ]
    They are top of the line for polks RTi series. Plus I like my music as loud and clean as possible [ Celso  Mar 31, 2018 ]
    just look at them wouldn't you. [ kris  Mar 08, 2018 ]
    Conrad, one of your advisors helped me decide based on my receiver purchase [ Joseph  Feb 07, 2018 ]
    My brother has these speakers and they sound great! The chance to get them on sale was too good to pass up: [ Ms Peirce  Dec 29, 2017 ]
    Have heard Polk speakers and liked them. Good price. [ Robert  Dec 26, 2017 ]
    I had a cheaper set of polk towers before and they sounded great. I upgraded to a more expensive Klipsch and had problems and couldn't get help(not purchased from you) so Im going back to polk plus the reviews are great [ James  Dec 21, 2017 ]
    Seeing these voice-matched towers at a discount was more than enough for me to pull the trigger to pair them with a previously-purchased CSi-A4 center channel speaker that I have been enjoying for the past three years. [ Myron  Dec 15, 2017 ]
    couldn't get bose 901's [ thomas  Dec 14, 2017 ]
    Always wanted to upgrade my old Monitor 10s to the RTI A7 but with the sales prices I decided to 'go all the way' and buy the RTI A9. Hope they fit in my room!! [ Randolph  Dec 14, 2017 ]
    to complete my Polk RTi A speakers system for 7.1 surround [ Vincent  Dec 08, 2017 ]
    Great speaker great price [ Dave  Nov 11, 2017 ]
    Great Price and, great Polk quality [ Marc  Oct 02, 2017 ]
    Love Polk speakers [ Fran  Sep 27, 2017 ]
    I've been on the fence for about a month, but the price drop was the kicker !!!!!!! [ terry  Sep 18, 2017 ]
    they sound amazing [ Kourosh  Aug 12, 2017 ]
    To my amateur estimation these are the best speakers to my Kenwood 9600 Receiver and beside of this you give the great discount. [ Mark  Jun 17, 2017 ]
    I have Polk Speakers. I needed to upgrade and these were on sale for some odd reason. [ Rodney  Jun 07, 2017 ]
    Time to upgrade the RT2000p's that have been so good to me for 16 years. Polk is a great way to enjoy Music and Movies. [ Mark  May 21, 2017 ]
    They're a badass versitile speaker [ james  May 21, 2017 ]
    I currently have the AT15 Cerwin Vega floor standing speakers which are 18 years old. These speaker could deliver some hard pounding base but its time for something more slim but could pack a punch. I am hoping that i would be happy with these speaker again read the reviews and its was positive. [ Judy  May 22, 2016 ]
    top seller, on sale, 3 way, low frequency 30 hz, appearance [ Kurt  Nov 05, 2018 ]
    It has a clean retro, cherry hardwood, with silver trim, almost steam punk vibe going on..... and its discontinued...... and less than half the original price. great deal on large towers that ill never be able to buy again. they also have great reviews online. and they are so beautiful. almost more art than speaker. [ P  Nov 02, 2018 ]
    Quality , Price , Years of product on the market ! As a beginner audiophile it's a nice purchase for (Music and Home Theater) . [ Brandin  Oct 26, 2018 ]
    I am going to purchase a new Yamaha Amp (probably the RX-2080). Was going to get the RTi A7 from Polk, but these were on sale for about the same price. Did not want to move up the $1500 speakers, so these seemed the best value. [ Michael  Aug 07, 2018 ]
    I've been A Polk Audio user since the mid 90's. I wouldn't buy anything else. The price was good too. [ ROBERT  Jul 28, 2018 ]
    I chose this item as it had great reviews and was in the price range that I was willing to pay. Polk is a new product line for me and I want to give it a chance. [ Tegid  Jul 17, 2018 ]
    I wanted tower speakers for my living room home theater that came in a wood finish, not black or lacquer, and had to be in a budget of >$1,000. Together with these criteria, I read the reviews on your site and thought these would be best, as I have owned Polk previously and have always thought them quality without bankruptcy. BTW, I have been purchasing things from Crutchfield since 1993, though not since the Great Recession of 2008. Thanks for all your help. [ Chad  Jun 12, 2018 ]
    Excellent reviews. I've used Polk Audio products in the past with great success. [ Jim  May 30, 2018 ]
    Will try and comment in a couple of days [ Daymean  May 30, 2018 ]
    By comparison, and through customer reviews, I have researched floor standing speakers, and found that for the money the Polk Audio RTi A9 speakers to be outstanding! [ Bennie  May 11, 2018 ]
    The best speaker by the numbers for the price and is part of a matched system [ Charles  Mar 26, 2018 ]
    I wanted large , well made speakers. The price was right too. [ Marc  Feb 06, 2018 ]
    This is the best floor standing tower speaker in Polk Audio's RTiA series. [ M  Dec 29, 2017 ]
    Excellent reviews and 40% off. [ John  Dec 07, 2017 ]
    the discounted price [ william  Nov 25, 2017 ]
    Needed speakers that will deliver good bass for music but also work well for Home Theater. Read good reviews for those and followed a recommendation of the assistant from Crutchfield. [ Yossi  Nov 24, 2017 ]
    Great deal and it matches the rest of my home theatre setup and furniture [ Juan Luis  Oct 20, 2017 ]
    On sale, good reviews and I've had good luck with Polk products. [ David  Oct 08, 2017 ]
    These speakers are highly rated with good reviews and are 40% off. [ SCOTT  Oct 06, 2017 ]
    Good Reviews for the past bunch of years. Saving $600 on the pair convinced me to see if they are better than my JBL L166's We'll see. [ Robert V.  Oct 06, 2017 ]
    I own the rti a7s already, love them and am upgrading. I would like to make sure that Zac gets credit for this sale as he was extremely helpful two weeks ago on the phone when I was making decisions. [ David  Oct 05, 2017 ]
    Quality of product [ Dan  Sep 22, 2017 ]
    Quality and power. [ Julie  Sep 20, 2017 ]
    I like the well balanced, warm and natural sound of Polk speakers. The Rti A9's are rated at 500 watts each and my amplifiers are rated at 450 watts each so it was a good match. The Rti A9's re well built and absolutly beautiful in the cherry. I have them crossed over at 60 Htz and they sound amazing. Give them plenty of power and they will shine!! [ Steven  Mar 16, 2017 ]
    reviews on your website [ w  Nov 12, 2016 ]
    Have been in the market for some nice powerful speakers for a while but haven't seen a 5-star average until now. Hope they don't disappoint! [ Eric  Jun 03, 2016 ]
    Read ALL of the reviews onlie at different websites. Also a co-worker has a pair of these. And....Polk has a great rep. I absolutly LOVE these speakers!!!! [ Friederika  May 27, 2016 ]
    I love Polk speakers. I have a pair of RTi A7 speakers as part of my home theater. For my Stereo setup I wanted something a little bigger, but with the same Polk sound. [ Laurie  May 08, 2016 ]
    Upgrading my family room audio speaker opportunity/capability to improve listing pleasures. [ Robert  May 03, 2016 ]
    Feedback [ Peter  Apr 06, 2016 ]

    7 questions already asked

    There are a lot of brands and models that would work. I'm a Denon fan myself. Figure out what you need. You might not need an 11.2. Maybe a 9.2. Save a lot of money. 11.2 is the most expensive. Spend the money on quality cables and connectors. You will be glad you did.thanx! [ Duncan  Dec 09, 2017 ]
    I'm using a onkyo tx-rz900 [ Richard  Dec 09, 2017 ]
    I would highly recommend it. Maybe 2. That's what the 2 in 11.2 means. Why spend that kind of money on the receiver if you don't use its features? [ Duncan  Dec 09, 2017 ]
    If you're using this speaker for music 75% or more of the time, then no. If you're watching a fair number of movies, then I'd look for a sub with at least a 10 inch subwoofer. [ Kwang  Oct 28, 2015 ]
    No but I am not a subwoofer fan [ ZEV  Oct 17, 2015 ]
    That depends on how mauch bass you want. These speakers are very powerfull and have great Bass without losing the clarity. I feel when I'm watching a movie with surround sound, these speakers need a bass. But when your listening to music the bass these speakers have is enough. [ Daury  Oct 07, 2015 ]
    I don't think so. I listen to 70's and 80's rock, Pink Floyd, Zeppelin, etc. I also listen to more modern stuff like Saving Able, Theory of a Deadman, Hinder etc. and the bass is plenty for me. The vocals are incredible from these speakers. I'm using an older Yamaha HTR-5890 with the "B" speaker output bi-amping the woofers. I know, it's not a true bi-amp, but it sounds awesome! [ PAUL  Oct 07, 2015 ]
    Mark, I listen to Jazz and to classic 60-80 Rock. I do have a sealed Velodyne sub from my Magneplanar days but I find I rarely use it with the A9's. I power them with a pair of 250 watt mono blocks and they sound great. [ Robert  Oct 06, 2015 ]
    These are full range speakers, so you don't have to have one. I have these, but also use a subwoofer for theater sound. These are awesome speakers tho. [ JAMES  Oct 06, 2015 ] had alot of bass already, so i don't think you need one [ Khanh  Oct 06, 2015 ]
    We do have the Polk Audio HTS10 (Brown) powered subwoofer cataloged in our inventory database; meaning we will eventually be carrying it here. However, I'm afraid we're still waiting for Polk to give us an official ETA for when we'll have them in stock. Like Steven alluded to in his response above, Polk's website has a release date posted for "October 2017" so hopefully we'll have more info on that soon. Please feel free to check back with us periodically for any future ETA updates--you can contact an Advisor directly by phone at 888.955.6000 or online chat. Thanks! [ Larry  Oct 04, 2017 ]  Staff
    Polk's website has a tentative release date of late Octorber. My guess would be that it's hard to say what the turn around time is for Crutchfield to get it up and available on their website IF they are even going to offer it. Hope this helps. [ Steven  Sep 30, 2017 ]
    To get the best sound from the A9's. They will need more power. They will sound clearer with more power. However, to achieve more power you may need to invest in a preamp and learn how to bridge or biwire amp to achieve the clarity. You can supply far more power than 500 watts to them and not hurt them. But before doing this you need to break the speakers in. [ Charles  Jun 05, 2018 ]
    Dont think it's necessary, but these speakers like to be pushed so I would [ LEONARD  May 27, 2016 ]
    I will not be able to answer that question because I have them paired with a Marantz. [ Phillip  Mar 29, 2016 ]

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