Superior performance in a 47 inch floorstanding tower.
8 5/16" W x 47" H x 14 3/8" D
21.11cm W x 119.38cm H x 36.51cm D
High End Audio for the Rest of Us
The LSiM705 fills your world with its wide, dynamic soundstage and its capability to effortlessly achieve truly staggering volume levels. The LSiM705 features the same component complement as the larger LSiM707 loudspeaker, on a slightly smaller scale. It includes a 5 1/4-inch mid-woofer of lightweight super cell aerated polypropylene for smooth blending with its dual 5x7-inch Cassini oval subwoofer radiators enhanced by Polk’s patented PowerPort® bass venting. Its 1-inch ring radiator tweeter, a feature usually found only in exotic speakers, reveals pinpoint details for realistic imaging. Use the LSiM705 in midsized rooms where you want the full-on impact of the legendary Polk sound.
Polk’s exclusive dynamic sonic engine design optimizes the midrange driver and the ring radiator tweeter in separate interior chambers for improved transient response, superior imaging and greater horizontal off-axis response.
Enhanced, reengineered ring radiator tweeters extend top-end response for incredible details and realistic imaging.
Newly designed Cassini oval subwoofer drivers, with more surface area than round drivers, dramatically improve low-frequency response for deep, well-blended bass.
Our innovative overhung voice coil design augments the excursion length for subwoofer drivers, increasing their power-handling capabilities and enhancing bass response.
Extended Linear Motion voice coil design allows lots of movement in a limited space, eliminating impedance and extending mid- and high-frequency response.
Lightweight, rigid cast aluminum baskets are designed for precision motor alignment with unobstructed linear movement and ample venting.
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 our engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds.
Our super cell aerated polypropylene cone is the ideal balance of lightweight stiffness (for more efficient action with less distortion-causing flex) and superior damping properties.
Durable, computer-modeled, injection-molded butyl rubber surrounds suppress unwanted cone resonances for a lifetime of reliable sound.
Exclusive, patented Orth crossovers increase lower-order power handling and smooth the impedance curve, for more efficiency and better high frequency response.
High quality, heavy duty LSiM enclosure construction features 1.0" MDF on the sides, 3/4" MDF on the back and bottom and 1 1/4" baffles with substantial internal bracing and separate interior cabinetry for each driver. These exceptionally robust materials efficiently eliminate cabinet resonances and standing waves for less distortion and more dynamic transparency.
Beautiful furniture-grade hardwood veneer cabinet finishes, with sleek trim accents and no visible screws.
Super-thin zero-diffraction grilles lock in place magnetically, and never obscure your sound.
PowerPort® 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 efficient, 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.
Innovative no-tip hex-head floor spikes make speaker-leveling easy on any flooring.
All Polk products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk loudspeakers are built to perform for a lifetime.
|Type||Dynamic Balance enhanced ring radiator tweeter|
|Diameter||3 1/4" (8.26cm)|
|Type||Dynamic Balance driver with super cell aerated polypropylene cone|
|Mid / Woofer|
|Diameter||5 1/4" (13.34cm)|
|Type||Dynamic Balance driver with super cell aerated polypropylene cone|
|Type||Dynamic Balance oval drivers with super cell aerated polypropylene diaphragms|
|Total Frequency Response||22Hz-40kHz|
|Upper -3dB Limit||30 kHz|
|Lower -3dB Limit||42 Hz|
|Nominal Impedance||8 ohms|
|Type||Orth crossover design|
|Recommended Amplifier Power||20-250 watts per channel|
|Inputs||Dual gold-plated binding posts|
|Width||8 5/16" (21.11cm)|
|Depth||14 3/8" (36.51cm)|
|Mid-High Array Enclosure Type||Sealed|
|Subwoofer Enclosure Type||Dual PowerPort bass venting|
|Width||9 1/4" (23.50cm)|
|Depth||16 1/4" (41.27cm)|
|Product Weight (each)||78 pounds|
|Unit of Measure||Each|
|Total Shipping Weight||86.4 pounds|
|Included Accessories||Binding post jumpers; Owners manual; Regisration card|
|Speaker Warranty||5 years 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.
3 reviews with an average of 5Write your own review
by chonk, April 9, 201310 out of 13 people found this review helpful.
If I had one to pick one, I would say the weight of them, they are very heavy. Over 70lbs but totally worth it.
These speakers are excellent. Crystal clear highs, mids and lows. Do not hesitate to buy, you will not be disappointed.
by Kent, November 2, 20132 out of 2 people found this review helpful.
Accuracy. Precision. Clarity. High end speakers for an incredible price.
Narrow base makes them a bit tippy.
LSiM705 Impressions With the recent acquisition of my new tube power amps, I’ve been looking for speakers that might be an easier load for them over the next several years. Specifically I wanted better efficiency and an 8 ohm impedance or higher. And of course if I was going to change speakers, I’d want to go up in sound quality, not down. This is hard to do on my budget. After a couple of recent false starts with other speakers, I was prepared to keep my Polk LSi15’s for a while Enter the Polk LSiM705. These speakers have been on my watch list since they came out a few years ago. At $3,000 a pair they’ve been a bit more than I wanted to pay. When a recent sale from Polk presented itself, I snapped up a pair! Unboxing: Wow, these speakers are heavy. At 78 lbs these are about 20% heavier than the LSi15s at 66 lbs. All of the internal bracing and separate driver chambers makes for a heavy speaker. They are 1.5 inches taller than my LSi15s and seem to be quite top heavy. The front feet look narrower than those on the LSi15. They aren't as stable as the LSi15's in my opinion. Fit and Finish This is an area that Polk has really outdone itself. These speakers look like hand built, custom speakers. Believe me, pictures do not do them justice. All of the hardware used is top quality. The veneer is flawless and looks painted on. All joints are barely even visible. There are no parallel surfaces in these cabinets and I doubt they are cheap to produce. The grills are held on with hidden magnets. The speakers therefore look great with or without the grills installed. This is a really great feature. I know that some other high end speakers use this method, but I’ve never owned any and it really works great. The binding posts and plate are higher quality than any I’ve seen on a Polk before. They give the speaker a high end, contemporary look. In some other reviews, positive comments have been made about the use of jump wires versus jump bars on the binding posts. This is a step in the right direction. However, I feel the wires and connectors used are slightly cheesy and not up to the overall quality of the rest of the speaker. I replaced mine with some better ones I had laying around. In order to level the speaker, the spikes/feet are adjustable from the top, which is a very convenient feature. The speakers are adjustable where they stand. There’s no need to tilt the speakers to get under them to make adjustments. The adjustment hardware is of high quality and gives the speaker an expensive high tech look. I’ve read people who’ve raved about the overall looks of the LSiM’s versus the LSi’s but I prefer the LSi15’s aesthetics. I am aware that I am in the minority here. In my opinion the color on the Mahogany models is too dark. These speakers might as well be black paint. In fact everybody whose seen these so far believes they are black, until I shine a flashlight directly on them. Only then can you barely see these are VERY dark brown. I also prefer the unique and contemporary shape of the LSi’s. I understand and appreciate the sonic benefits of the LSiM’s curved cabinet, but I don’t think they look as contemporary and they don’t fit my decor quite as well. The Sound: In the last few years I’ve had a number of different speakers in my two channel rig for extended listening: Magnepan 1.6 Paradigm Monitor 9 Vandersteen 3 B&W CM9 MartinLogan ElectroMotion ESL Zu Audio Soul Standard Polk LSi15 Of these, I’ve liked the LSi best. They gave me the best balance of clarity/imaging, dynamics and overall value. The LSiM705’s are a great leap forward in every regard. In his Model 7, Richard Vandersteen claims to have produced the world’s first “truly pistonic” drivers, with cones so stiff that they can’t breakup. I can’t speak to that claim, but the model 7 is the best imaging speaker I’ve personally heard. The imaging and clarity of these 705’s approaches that of the Vandersteen Model 7 and easily bests the Model 3 in my opinion. The “aerated polypropylene” cones are said by Polk to provide for a very lightweight and very stiff driver. I believe them. I really can’t say enough concerning the accuracy and precision and clarity of these loudspeakers. Polk has really done their homework on the design. And unlike other highly accurate speakers such as Thiel and Vandersteen, these speakers aren’t bashful. Throw on some Led Zeppelin or Rush, turn up the volume, and they’ll provide an instant party. They have a bigger soundstage than the LSi’s and much bigger than the previously mentioned brands. Lots of audio enthusiasts are aware of the phenomenon of better speakers being less forgiving of poorer recordings. The LSiM705s display this characteristic to an extent. The 705s can sound a little cold when asked to reproduce bad material. This is an unfortunate aspect of hyper accurate speakers. This pair seems to be doing less of this as they get broken in. I mentioned that one of my goals was for a more efficient speaker than my Lsi’s. With my 15’s and these 705’s both being rated at 88db it appears I haven’t accomplished that, and I was prepared to accept that. However, these speakers seem significantly louder that the LSi’s at any given preamp volume setting. I can only guess that my tube amps are happier with the 705’s higher impedance and being operated off the 8 ohm versus 4 ohm taps. For me these speakers are Keepers. Big time. Truth be told, I could have remained happy with my Lsi’s. When auditioning other speakers, I would at times find a pair that gave me more of a certain aspect of sound quality. Maybe better resolution, or better dynamics. Possibly better sound stage, or better efficiency. But I’ve never found a speaker that provided the overall balance of the LSi’s. At least none I could afford. Until now. Peace...
by Raymond, October 5, 20130 out of 1 people found this review helpful.
Gorgeous looks. Unfatiguing. Once I had a 4 hour session with it and still came out fresh and wanting more.
Needs good amount of power to perform. Had long break in time. Had to wait almost 300 hours before they begin to shine.
These are excellent spwakers for its price. Deep powerful bass with very clear highs. The mids could have been better. Good for most genres of music. You would be rewarded if you feed it with a good source or recording.
View all Professional Reviews
"Check these things [LSi M 705] out in person. The real-wood veneer (my samples were in Mt. Vernon Cherry; they’re also available in Midnight Mahogany) was almost unworldly in execution...the LSiM705 might be a final destination for the audiophile seeking a neutral-sounding floorstander of modest size whose looks match its fine sound."
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Frequently Asked Questions
- Why are there two sets of terminals on my speakers?
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- How do I get the little plastic inserts out of the binding posts so I can use banana plugs?
- What is Aerated Polypropylene?
- What is the Klippel Distortion Analyzer?