Originally Posted by natchie
I have Polk Monitor 70's and 60's. How much better are the towers LSiM-705s? Now I am getting tempted to grab them at this price...why so cheap?
The LSiM series is Polk's attempt at a better more accurate speaker. They put a lot of engineering into the development of the line over the years. Adorama can sell these at low prices because they sell a ton of them!
See the LSiM Technical Brief
Its a great read about the line: http://www.sohmerassoc.com/cedia_201...ical_brief.pdf
Here are the results of the engineering:
Originally Posted by Polk Audio
Overview—The LSi Legacy
The holy grail for any serious listener is a loudspeaker that brings audio performances to warm, dynamic life. Polk Audio’s LSi Series, introduced in 2001, was created to please just this kind of listener. LSi Series loudspeakers delivered flatter, more accurate frequency response, with lower distortion and more realistic details, than any speaker in their price range. Superior components, including tweeters normally found on much more expensive speakers, housed in beautifully sculpted cabinets, brought accolades from the professional audio press for superior imaging and tonal accuracy. LSi Series has remained the Polk Audio flagship product for a decade. Now, it’s time to revisit the design and engineering of this incredible loudspeaker; to use newly developed technologies to increase the value equation of the series. This is not an evolution. It’s a revolution. The new LSiM is an emphatic restatement of the qualities that made the original series so great.
Performance Objectives Of The LSiM Series:
The performance objectives for the new LSiM Series predate the original LSi design and are, in fact, design principles Polk Audio first set down during development of its original Monitor loudspeakers. These ideals have been guiding principles for Polk Audio’s best high performance loudspeakers:
Sound that virtually transports the listener to the scene of the recorded performance.
1. Pleasing tonality, even during extended listening at performance levels.
2. Crisp, lifelike impulses, transients and coherent detail without any unnatural ringing or decay.
3. Natural reproduction of complex low frequency instruments and special effects.
4. Uniform sonic representation within the listening area and immersive spatial impression.
5. Reproduce concert/theater levels while maintaining linearity and accuracy.
6. Compatibility with a wide array of electronics both past, present and future.
7. Work as promised for many years of enjoyment.
Originally Posted by Sound & Vision
The measurements of the LSiM 707 tower and the LSiM 706c center are fantastic. Although on-axis measurements are not shown in the accompanying chart, they’re as close to perfect between 500 Hz and 20 kHz as I can remember seeing: ±1.37 dB for the tower and ±1.49 dB for the center.
The tower speaker’s off-axis response is similarly great. Out at ±30°, there are no off-axis response artifacts except a mild rolloff above 8 kHz, which pretty much every speaker with a 1-inch tweeter has. Even at ±60°, the only response error besides the increased treble rolloff is a dip of about 2 dB between 800 Hz and 2.5 kHz. As you can see from the measurement chart, the tower’s bass is boosted by about 5 dB between 40 and 90 Hz, although the effects of this boost will be altered tremendously by the distance from the speaker to the nearby walls, and by room acoustics.
The center speaker frequency response measures almost just like the tower speaker’s, which is pretty remarkable — something made possible by its three-way, tweeter-over-midrange design. It shows the same off-axis treble rolloff, but instead of the dip between 800 and 2.5 kHz ±60°, the center shows a deeper, narrower dip: 5 dB between 500 and 650 Hz.
Read more at https://www.soundandvision.com/conte...zi1bvjBMszs.99
For $1K the LSiM705 is a great sounding and great looking speaker; even though Adorama has had even better blow out price deals like the 705 set, 703 set and a 706C center all for $1500!
Give these puppies some nice power / amp and source then sit back and smile!