The Polk Audio LSi M 707 Floor Standing Speaker (Midnight Mahogany) incorporates the latest developments in speaker technology, fitted into a newly designed enclosure that's beautifully sculpted and luxuriously finished. The heart of the LSi M 707 is Polk's Dynamic Sonic Engine. Made up of a 3-1/4" midrange driver and a 1" ring radiator tweeter in its own acoustically sealed enclosure, this tightly spaced duo acts like a "mini-monitor." The precise alignment of the midrange and tweeter allows them to disperse sound over a wide, uniform area with excellent off-axis response in the critical 200 Hz to 2,000 Hz midrange.
A slight reshaping of the tweeter's bullet-shaped phase plug allows it to move even farther out of the baffle, while a redesigned diaphragm has made the tweeter even more efficient. It even has its own tuned enclosure within the Dynamic Sonic Engine. These changes result in higher power handling, extended dynamic range, improved dispersion and extended high-frequency response - all the way up to 30,000 Hz
The LSi M 707 features a 4-way design, meaning that the tweeter handles only the highest of frequencies, the midrange handles the middle frequencies, the midbass handles the mid to low frequencies and the woofers handle only the lowest frequencies. This separation allows each driver to perform within its optimum range, meaning you'll hear sound with absolute clarity and stunning impact. And this speaker uses proprietary Orth Crossovers, making it extremely efficient and easier for your receiver or amplifier to drive.