Polk Audio RTiA9 High Performance Floorstanding Loudspeaker - Each

Model: AM9975 UPC: 747192118457 Item: 66


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Better than Being There

The RTiA9 is a high performance powerhouse and the ultimate manifestation of Polk's RTiA Series. Featuring Dynamic Balance transducers—three 7" bass drivers, two 5 1/4" midrange drivers, and a 1" high-frequency dome tweeter—the RTiA9 will fill even the largest room with energy and excitement. With a mind-blowing 500W power capacity, these speakers can take everything you can give them and more. Watch high-octane action movies in their full grandeur, or delight in an intimate jazz performance.


  • The proprietary curved, 6-layer DAHLI enclosure design creates the optimal shear damping for a more rigid, acoustically inert enclosure and minimal cabinet resonances.
  • The two 5 1/4" midrange drivers are housed in their own tuned internal enclosures for increased clarity and life-like detail.
  • Klippel motor optimization uses laser measurement technology to ensure a smooth excursion path at either end of the volume spectrum for uniform performance at both low and high volumes.
  • Polk's proprietary, patented Dynamic Balance technology allows their engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds.
  • Durable, computer-modeled, injection-molded butyl rubber surrounds suppress unwanted cone resonances for a life-time of reliable sound.
  • The RTiA Cascade Tapered Crossover eliminates the comb filtering and beaming, common to multi-driver speakers, which degrades the quality of the audio and collapses the soundstage.
  • Computer-modeled anti-diffraction grilles enhance the good looks while minimizing sonic interference.
  • PowerPort Plus bass venting is Polk's patented design for smoothly transitioning the air flow from the port into your listening area, eliminating turbulence and distortion, for bigger, more musical, deep bass impact.
  • All Polk loudspeakers are timbre-matched within their series, designed with the same components throughout, to achieve seamless speaker-to-speaker blending effects in multi-channel systems.
  • Dual gold-plated, professional-style 5-way binding posts, for the most secure connection options.
  • Dual binding posts allow bi-amp or bi-wire connections, for the ultimate in customized high performance audio.



  • Dimensions (W x H x D): 8.875" x 48.625" x 21.375"
  • Weight: 75 lbs.
  • Mid-high array driver complement: (2) 5.25" diameter midrange
  • Subwoofer array driver enclosure type: PowerPort Plus bass venting
  • Subwoofer array driver complement: (3) 7" diameter subwoofer
  • Front array driver complement: (1) 1" diameter tweeter
  • Total frequency response: 18Hz - 27kHz
  • Sensitivity (1 watt @ 1 meter): 90dB
  • Lower and upper -3dB limits: 30Hz - 26kHz
  • Midbass/woofer crossover frequency: 120Hz
  • Tweeter/midrange crossover frequency: 1.8Hz
  • Recommended amplifier power per channel: 50 watts - 500 watts


What's in the Box

What's in the Box:

  • RTiA9 High Performance Floorstanding Loudspeaker



Customer Reviews for Polk Audio RTiA9 High Performance Floorstanding Loudspeaker - Each

4.7 / 5.0
19 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Need ample power! Seriously! No AVR is enough!
I've now had them for about 8 months, I run a Marantz SR-7007 with a Crown Xli-2500 @500 watts per channel and they handle it with grace and ease. I honestly can't imagine running them with less than 200 watts with a dedicated amp. If your AVR can get more than an HONEST 130 watts per channel with 5 or more channels driven I'll eat a bowling ball! Most great AVR's might reach 110 with 5 channels driven, they're often rated at 2 channels with high distortion and can't come close with all channels driven st 8 ohms. They really shine in movies and play music beautifully, set your speakers to small and crossover to 60 hz, they really rumble in that range, let your subs handle below that. In 2 channel music they imagine very well and are quite robust in mid range while sharp on staccato drum beats and Spanish guitar sounds. Somewhat bright on highs during break in, but calms a bit, your room can impact this one way or another, movies are truly amazing. For the money you can't do better without building it yourself, but, please make sure you are running a bare minimum of 200 watts per channel and realistically closer to 500 per channel if you want to get the most out of them.
March 10, 2019
Originally posted at
Polk Audio
used only for hifi
I have been into hifi for over 35 years.
I thought I would give an oppinion from a pure hifi use.
Firstly I owned Kef 104mk2 speakers before these, but the aged out, needed repair and were no longer suported.
So new speakers were needed. I like to listen loud, ot all the time but quite offen. I had a specific list of desires:
1/ cost not more than 1500 euros ( I am in europe) about 1300 dollars.
2/ have a large power handling capability wide bynamic range.
3/ Be able to reproduce very low frequncies wide frequncy range.
4/ 90 db sensitivity or better.
5/ bi amp-able
So I looked at Kef, B&W, Dali, and many many others, none had all on my specification list and ALL were more expensive, some double or more....

These speakers area a very special if not unique product. However nothing is perfect
Fantastic bass, for the price unbeatable dynamics, great sound stage/focus, go very very loud without distortion. I would unreservedly recomend them for films.
one very small niggle, they are a little harsh in the upper mid/lower trebble, but with carefull setup and use of right equipment and perhaps eq if you have it this can be mostly overcome.... My system is ver simple: Cambride Audio azure CD Player, Top of the rage award winning Nad preamp, Musical Fidelity A370 power Amp-(running top binding post rtia9s) 750wpc pro amp running the lowwer bass input rtia9s.... Somomne in the mods forum has upgraded the crossovers and reports a much smother and somewhat improved overall sound. I whish Polk would ofer this as an option. or simpley offer a Special Eddition Version. I think they are missing a trick here, I would be willing to pay perhaps another 200 euro for this version. It could be marketed as a 'optimised for hifi use' version. I know thay have the Lsm is it range but this is out of my budget!

As a last note power, good qualit power is Essential, to get a stunning performance from these great speakers, I have heard people complain they
were not satisfide with the performance from these speakers.... The problem is NEVER the speakers, it is ALWAYS poor amplification. In my opinion 200wpc is the bare minimum you need, the more you pump in the better they like it! I am running almost a 1k signal per channel for peaks and they rock! 500 max rms.

I give 4 stars for hifi sound in other words very good, there are somewhat better sounding speakers but with less of all the thigs I mentioed andjust a little smoother sound.... at 2 or 3 times the price....!
I would give the full 5 stars for film use.
January 22, 2019
Originally posted at
Polk Audio
Amazing speakers!
I have had my RTI a9's for only a week. First the Cherry finish is beautiful! Clarity and response is exceptional. They do need serious power. I first hooked then up to my Denon avr reciever rated at 110 wats per
channel. But there was no low end! So I set it to multi channel stereo and bi annoyed the speakers. With+7db on the low and -6db on the high b the speakers sounded great. However I want happy about the set up. So I got my 25 year old Harmon Kardon integrated high current amp and connected it single amped. At only 50 Watts I wasn't expecting much a but they sound amazing with that amp. After a few hrs of break-in, I'm so happy with them. So I recommend an amp with a hefty power supply like a true high current amp has. Only issue I have had is there grills insert pins keep popping out. On one speaker it's the top 2 on the other it's the bottom 2.
January 16, 2019
Originally posted at
Polk Audio
Beautiful sonics and looks
I purchased these speakers about 5 weeks ago., they are the best sounding loudspeakers I have ever owned. My other speakers were ar3as, 4x, advents , Bose 901 and now Allison 4s and 3s and klh6s. These are all great speakers. The polks Rti a9s are the "Icing on the cake". You need to spend a lot more money for better sound. I'm very happy with these.
October 14, 2018
Originally posted at
Polk Audio
An amazing speaker!
I purchased one pair of the Polk Audio RTI A9 and these are the best speakers ever!

My cd player is a Yamaha and my av receiver is also a Yamaha with 130 wpc x7.

The sound is nothing short of amazing either in Pure Direct (for critical listening) or with my pair of subwoofers.

It would be the last pair of speakers you ever need to buy!
April 29, 2018
Originally posted at
Polk Audio
Best bang for your buck versatile speaker
This speaker is incredible. The RTiA9 blows 'em away!! I've owned two pairs of A9's for over six years now and they still continue to impress me!

Granted, when rated at 500watts, depending on what and how you use them, they will require some extra power other than your receiver. Any jack-A, excuse me, any person that buys this speaker without knowing what he's got, just doesn't appreciate great sound.

Most (not all) home theater applications will use the RTiA9 crossed over so that the dedicated subwoofers would do the heavy lifting in the LFE department. It's the lower end of the cabinet that sucks up power like no other. Those three magnificent 7" bass woofers, can move air, producing LFE that will impress any naysayer. And if you're using the lower end of the cabinet to handle the LFE from todays movie audio tracks, then indeed, some external amplification is recommended.

I can't tell you how many times I've heard mention that the RTiA9 is a great "movie" speaker but not that great for 2ch, my reply to that is horse pucky!! I've taken the time to groom a pair of A9's specifically for 2ch, and they didn't disappoint. Placement is very important, contrary to some belief, cabling is also very important, not so much as from amp to speaker, but from source to amp. Protecting the signal from degradation is pretty important, especially if there is "any" amount of RF in the room. Shielded copper is a great way to protect your signal, the cleaner the signal, the better the sound. The RTiA9 can and will reproduce a sound that will delight over and over. My 2ch A9's were set up so well, that my wife preferred music, listening to them over my 2ch LSiM 703's, that's a statement.

One other key factor I forgot to mention in set up is; room treatments, google it if you aren't familiar with the term. Once I had my foam up on the walls, the difference was so noticeable, that even my 9 year old said, "daddy, it sounds like wearing headsets".....yep, isolation is a good thing.

If you're looking for baby sound, go get an HTIB, if you're looking for a great home theater sound, or even looking to set up a killer 2ch system, then look no further, in my opinion, the RTiA9 is the sweet spot out of every Polk series. Over six years later, if I could do over, I'd do it the same!
September 30, 2017
Originally posted at
Polk Audio
Not Worth IT.
Those Speaker are not that good as people think,actually they are bad....
First of all if you think your big box shop receiver can drive those good you are wrong. these need a ridiculous amount of rms power to have a decent sound out of it. For budget speaker like this you will need to spend 3 times more for a power amp
or bi amping it... You can find thoses speaker at 50% Off almost every week at best buy and then you think you got a freaking deal.... Polk make theirs speakers ridiculously huge thinking you got a monster theater room... like the csia6 a huge box again for notthing... I respect Polks fans i was one myself, i own almost all polk serie over the years include the rti Deals on it make you just buy it 50% off why not... well if you dig a little you have so much better option out there a real good sounding speaker dont need to be as big as your fridg! Did yourself a favor and go listen to real speaker and youll notice the diff.. nerver again polk for me trying to get rid of them all asap. I cant name brand but just go to a real audio store not a best buy and then youll find real speaker
September 3, 2017
Originally posted at
Polk Audio
great speakers
I've had mine about a year now and so far they have done very well. I run them bi-amped now although I was initially running them with a different receiver and used them bridged with no problems. They have excellent overall sound but they can be a little lacking (in my opinion) on the lower end depending on the song, however I was able to readily correct that with the addition of a Polk subwoofer. The sound is incredibly clear with an amazing depth that I've only heard in a select few top-of-the-line speakers. Plan on using some power to drive them, I using a Yamaha amp with 125w RMS with 3db headroom to drive them and I yearn for more power at times.
December 13, 2016
Originally posted at
Polk Audio
Need some power to drive-But they are VERY good!
I have had mine about a year;Also a CSi-A6 center,(2)F/X A6s for rears ,(2)OWM5 for high/wide,and (2) Monitor 70 Surrounds. With the addition of an amp for the front Sound stage-I have yet to have a better performing set of speakers.
November 23, 2016
Originally posted at
Polk Audio
More than reference theater
My original set up consists of 2 pairs of RTiA9s. The second pair is utilized in the wide channel. I debated for some time as to what speaker to run in the wide position. Many suggested I just run a decent set of book shelf speakers, others suggested anything more than the RTiA5 would be a waste. I am so glad I went with my gut instinct. After running a pair of Monitor 70's as wide's next to my first set of A9's, I knew a tower was the way to go for the wide channel. Having the A9's as wide's is an experience you won't easily forget. During movie scores, the mains and wides use the same track, essentially doubling your front stage (magnificent), music pounding out in high definition through 2 pairs of A9's is an indescribable treat for any listener. For involvement of the wide channel, the detail that the A9 offers is staggering. The sensation of being placed in the action is as close to reality as it gets!!

Lets talk about 2ch for a moment, the A9 can be groomed to offer musical satisfaction that is detailed, full of depth, superb imaging and hours of non fatiguing 2ch enjoyment. After experimenting with power applications, cable applications (they don't have to be super expensive, just quality components like multiple shielding and connectors that offer maximum signal transfer), speaker placement and room treatments, the response from my guests are always the same when they hear my demos, a brief silence followed by a gasping "Wow".

If you intend to run the RTiA9's to their full capacity, or also known as "Large" or "Full Band", I would recommend an external power source in addition to your AVR. The woofers on these bad boys can suck up some power like no other, and these woofers do NOT disappoint. The LFE's produced by the A9's are more than impressive. Those that come to visit your set up and don't know any better, will swear you have a subwoofer hidden somewhere. I got myself in trouble with my significant other by showing off one day, "look honey, that was just from the towers, I took the subs out". Her reply was "And why do we need subwoofers again?"

If you are considering the A9 for either theater or 2ch or both, go forward with confidence. I have no regrets after 5 years and I'm still impressed with the sound!
August 30, 2016
Originally posted at
Polk Audio


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