This product is a vintage Polk model and is not available for sale, but it may still be available in some stores as a closeout or used product. The following text is taken from the original sales brochure for this product and does not reflect current availability. If you happen to have any question or concerns about this product, or any other Polk Audio product, feel free to contact our Customer Service Department at 1-800-377-7655 Monday - Friday, 9am - 5:30pm EST
5.25 inch two way system with external crossover
The Ultimate Listening Experience
THE ULTIMATE LISTENING EXPERIENCE
A great set of wheels deserves a great speaker component system.
Based on technology adapted from our top-of-the-line award-winning LSi in-home series, the Polk Audio SR5250 Signature Reference Series 5 1/4" Component System is for people who want the highest-performance sound for their high-performance car.
PERFECT FIT, ULTIMATE FLEXIBILITY
The SR5250 can be used either as a separate component system or converted into the best dang coaxial speaker on the planet. Each SR System includes mounting adaptor plates that allow the SR5250 to fit almost any application.
The tweeter can be used either as a separate component or post mounted coaxially with the driver. Two flush mount cups (straight and angled) and two coaxial posts (straight and angled) are provided for the ultimate in installation flexibility.
Award-winning Polk Audio technology places the SR Signature Reference Series at the apex of high-performance car audio. The drivers use aerated polypropylene cones for maximum stiffness and minimum cone resonance, ensuring a tight, clean, articulate response.
Nitrile butyl rubber surrounds, laser-optimized, vented 2-layer Kapton voice coils and formers, and case aluminum baskets with extra heat dissipating features, all contribute to the SR Series' professional sound quality and outstanding reliability.
- Aerated Polypropylene Cone. The mid/bass driver cone is Aerated Polypropylene in which air is injected into Polypropylene to produce a honeycomb structure that serves to stiffen and damp the cone without adding mass. This is the same cone technology employed in Polk's critically acclaimed LSi Series audiophile-grade home speaker line.
- Polyimide Voice Coil Former for high thermal stability (rated to 220°C) high power handling and low mass.
- 1 1/2" Voice Coil For better power handling and bass output.
Butyl Rubber Surround
Further damps cone resonance for wider response and lower distortion. High resistance to UV and temperature extremes means long life and reliability.
Removable Phase Plug
For smooth, flat frequency response even off-axis. Remove the phase plug and replace it with either a straight or angled tweeter mounting post to transform the SR5250 into the absolute best coaxial speaker on the planet.
Neodymium Magnet Structure
Finite Element Analysis (FEA) design makes the powerful neodymium magnet more linear for lower distortion and higher definition. Small Neo magnet makes the SR5250 easier to fit into more locations and vehicles.
Die Cast Aluminum Basket
Provides greater resistance to resonance.
- 2 1/2" Mounting depth plus supplied spacer rings ensure easy installation into a wide variety of cars.
- U.S. & Euro hole patterns to line up with the mounting screw holes of virtually any vehicle.
- 4-Way Gold Plated Input Terminals Corrosion resistant terminals accept fastons, spade lugs and bare wire.
- Vent Holes in the basket equalize air pressure on both sides of the spider for more linear travel, flatter frequency response and lower distortion.
A SWEET TWEETER
Polk's 22mm Ring Radiator Tweeters, usually found only in high-end home speakers, pack high performance and power handling into a small package.
A powerful Neodymium Motor Sturcture with Faraday Cap maintains consistent impedance, lowers distortion, extends and improves high frequency response.
The result is razor sharp detail, stunning accuracy, and top-end response well over 40kHz.
22mm Ring Radiator Tweeter
Ring radiator tweeters have inherently few performance-robbing resonance modes. The result is flat, extended frequency response beyond 40kHz, low distortion, excellent dynamics, exceptional detail and transparency.
Neodymium Motor Structure with Farraday Cap
The copper Faraday Cap on the pole piece flattens the impedance curve, lowers distortion, extends and improves high frequency response.
High Frequency Waveguide
Prevents phase cancellations for smooth, uniform frequency response and wide dispersion.
OUR CROSSOVERS MAKE A BEAUTIFUL SOUND, TOO
The SR Series outboard crossover features 2nd Order filters with the finest 1% tolerance parts including Mylar Film Capacitors and Air-Core Inductors. You hear better dynamic impact, more transparency, faster transient response and lower distortion. All of which adds up to utterly sublime music to your ears.
The SR components are easily bi-amped with seperate woofer and tweeter crossover inputs. Gold-plated terminals resist corrosion, and three levels of tweeter attenuation let you dial in the treble balance that's right for you.
- Zoebel Network flattens the system impedance curve for more efficient power transfer and flatter response.
- Air Core Inductors with Oxygen Free Copper wire, for wider dynamic range, contrast and punch.
- Tweeter Protection Circuit.
- Gold-plated connectors.
- Mylar Capacitors better damping factor. 1% tolerance Resistors and Capacitors for perfect unit-to-unit consistency. 4-position Tweeter levels: +1, 0, -1.5, -3.
- Cast-Aluminum heat sink chassis.
- 2nd Order Low Pass Filter.
- 3rd Order High Pass Filter.
*The Innovations Design and Engineering Award is based upon descriptive materials submitted to the judges. CEA did not verify the accuracy of any submission or of any claims made and did not test the item to which the award was given.
|Type||Ring Radiator tweeter|
|Mid / Woofer|
|Diameter||5 1/4" (13.34cm)|
|Type||Dynamic Balance driver with aerated polyproplyene cone|
|Total Frequency Response||60Hz - 30kHz|
|Nominal Impedance||4 ohms|
Thiele / Small Parameters
|Resonant Frequency||71 Hz|
|SD||14.33 sq. in., 92.46 sq. cm.|
|VAS||0.2073 Cu. Ft., 5.87 L|
|Cut-Out Diameter||4 3/4" (12.06cm)|
|Tweeter Cut-Out Diameter||1 3/4" (4.45cm)|
|Height||1 1/8" (2.86cm)|
|Diameter||6 3/16" (15.72cm)|
|Driver Mounting Depth|
|Top Mount||2 1/4" (5.71cm)|
|Unit of Measure||system|
|Speaker Warranty||1 year parts and labor (original purchaser)|
Specifications, dimensions and features subject to change without notice. For more information call us at 1-800-377-7655 (USA and Canada). Outside of North America call +1 (410) 358-3600.
6 reviews with an average of 5Write your own review
by badfireguy, August 24, 2009127 out of 208 people found this review helpful.
Pin point imaging, human voices spot on!
If you can find one, let me know!
When you are tired of just plain loud, this is the next logical step toward audio nirvana. Finally, after thirty years in the pursuit of the perfect system, along came the SR series of components. I realized one day recentely that I had fallen into the habit of assuming that the 6.5" component speakers HAD to sound better because they were bigger. I remembered a system I had some twenty years ago that absolutely nailed the human voice. The soundstage and imaging was astounding, and I realized that I had used a pair of Vifa doped paper midwoofers for the front speakers. Now don't get me wrong, the Momo 6500's I had been using in my current system sounded very, very good. I just didn't have the detail I am used to in my home system. So the search began for the perfect set of component speakers to finally finish the perfect system. I listened to every set of components over the $500.00 price point. All the way to the $3600.00 Focal and Dynaudio systems. I already had a pair of SR-104 subs in the system, but couldn't find anyone in the Dallas area that carried the SR components. I finally looked at the Polk Direct Ebay sight on night and there they were...SR-5250's! I couldn't resist. When they arrived, I was stunned at the quality of the drivers and crossovers,(the crossovers look like they probably cost more that the selling price just to build)not to mention the installation components to allow for placement just about anywhere you would like. I installed them the next day and immediately heard an amazing improvement. After about thirty hours of break in, these speakers will make the hair on your arms stand straight up! The ring radiator tweeters are the answer to anyone facing the problem of having the mids and tweeters placed too far apart in the factory locations. The tweeters are crossed over low enough to get most of the voices up and away from the floor. And therein is the answer. Now I have EXACTLY the sound I have been working toward forever. These 5.25" drivers go just as low as my old 6.5" Momo's, just much cleaner. Don't be fooled by the motor structure of these speakers, they are of the highest quality materials I have ever seen. Even better than the Morel's! If you want to get off the high end merry-go-round, and finally be able to just turn it on and enjoy music, these are the speakers for you. Buy them on faith, buy them with reservations, just buy them before it's too late! You will never regret it. Hell, you might even save some money in the process!
by Greg Peters, August 10, 2006113 out of 212 people found this review helpful.
The high frequencies are amazing- outstanding detail. These tweeters sound great with every type of music I've thrown at them. They can be set up to sound very neutral to quite bright with the crossovers, and will integrate in a wide variety of systems and appeal to many listening tastes. The SR speakers are a "must hear" if you are shopping around.
On the pricey side (but worth it). If the SR6500 set will fit in your car, buy those instead because the midbass response is far better than these 5 1/4" speakers. If you don't have the room for the larger component set, you can't go wrong with the SR5250. They do not distort with lower midbass frequencies, but cannot produce the same output in that range as the larger component set. I would have given these a fifth star if I'd never heard the SR6500s as a benchmark.
Beautiful sounding set of components. Smooth response across the spectrum and very detailed. The build quality seems excellent and they should last a long time. Polk Signature Reference is a great choice for a high-end SQ install in your car, so if you buy these take the time to install them right. Overall, I'm very satisfied with these speakers and can't wait to hear the SR line of subs.
by The Swede, April 17, 2006100 out of 188 people found this review helpful.
Everything sounds so natural and accurant. The frekvence handling is just superb.
None at this point. Havenīt heard any weaknesses.
As far as I can say as a competitor and soundjudge in soundquality, I replaced my MMC 525 ( bye the way arenīt bad at all )for these nice and god looking speakers and they are the greatest Iīve heard in a long time.
by Chris St.Aubin, July 2, 200696 out of 203 people found this review helpful.
The midbass of the 5250's is phenominal! I also have it set up as a 3 way with the 6500 woofers in the doors and truthfully dont think I need them!
NONE!!! did I mention that the Midbass is crazy? and the tweeters are insanely smooth!??
Well what can I say, I have had another "Q"uality brand of speakers in my car for 6 years and was a little hesitant to think there could be an improvement. All I have to say is HOLY F**K!! out of the box these things blow away my previous speakers! I am told that after about 40 hours of break in they will sound even better, what can I say, the asking price is way lower than what I previously had and the sound is no where near the same, save you cash and buy the POLK SR's! The boys at Polk have cranked one out of the park this time!
by Iceman, June 15, 200691 out of 192 people found this review helpful.
MIDS & HIGHS PERFECT I don't know about the lows my monster sub take care of that
High Price Tag for Each System at CarDomain
KICK BUTT SYSTEM I have 4 of these and 1 Mtx Jack Hammer T9922-22 Sub in my 06 GMC XL Denali and i've won everytime somebody with a so called big loud system steps up
by Ivan Milosavljevic, January 15, 201077 out of 156 people found this review helpful.
Wonderful sound quality. Crossover has very useful attenuation options.
Could use some additional tweeter mounting options, such as surface mount or 30deg angle semi-recessed mount.
I have always loved Polk Audio speakers, and the SR5250s do not disappoint. The 5.25" drivers do not deliver a large amount of bass, but fill in the mid-bass to midrange frequencies very well. I did, however, notice a little more bass out of them after breaking the speakers in for a couple of months. The tweeters offer a few mounting options, including recessed and semi-recessed/angled (to around 15 degrees) mounts. I could have used a greater angle mount (30 degrees) to avoid reflecting the sound off my windshield. Reflecting sound off the windshield caused some brightness from the tweeters which, apparently, Polk has already considered. This brings me to the crossovers. They are very large. Luckily, I found perfect mounting locations inside my doors. What I like most about the crossovers is the ability to attenuate the tweeter output by 1.5dB or 3dB. Because of my non-ideal tweeter mounting location, I attenuated the tweeters by 3dB, which considerably reduced their brightness and smoothed out the overall sound. I also have a pair of MM6501 speakers in the rear doors. Although they sound very good for their price, I can really tell the difference between the MM and SR series speakers; especially the tweeters.
This product is considered a "Recent" or "Vintage" Polk Audio model. It is not a part of our current product lineup. It may still be available in some stores as a "close out" or "used" product. Information provided here about this product may not reflect current realities and does not imply availability. If you happen to have a question or concern about this product, contact our Customer Service Department at 1-800-377-7655 M-F 9am - 5:30pm EST. Chances are we remember it.
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