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List price (MSRP): $595.00 (pair)
Surround-550 THX ULTRA speaker
Take the same tweeter used in our reference S-150 THX speakers, add our Phase-Focused crossover, and the same 5 1/4" woofer as the LCR-750THX, and you get asurround channel speaker that actually outperforms many competitors’ Main channel speakers.
EXTREMELY WIDE LISTENING WINDOW WITH THE M&K HIGH-FREQUENCY PRISM SYSTEM
The first question everyone asks is “Why does the Surround-550THX tweeter point away from the listener?”
The answer is M&K’s innovative High-Frequency Prism system. The Surround-550THX’s stylish, high-tech heavy curved mesh metal grille combines with the 4.7 degree mounting angle of the tweeter and the Phase-Focused crossover to form the High-Frequency Prism.
This system vastly improves the speaker’s off-axis response (as well as the on-axis response) by shaping a smooth and extended flat high-frequency response over a very wide listening window. The window, which is directed for optimum imaging, is especially wide for a surround speaker. Counterintuitively, the system points the tweeter away from the listening position.
WHY IS ALL OF THIS SO IMPORTANT?
When listeners are located off of a speaker’s direct axis, the sound they hear is prone to irregular response and lobing. Lobes are large off-axis dips and peaks in frequency response that cause significant performance problems, resulting in poor sound quality for listeners sitting off-axis—and it is almost a certainty that listeners will sit off-axis relative to the surround channel speakers.
M&K PHASE-FOCUSED CROSSOVER
M&K's exclusive Phase-Focused crossover further improves the speaker’s performance by also optimizing more than just the speaker’s on-axis response to give a very smooth response over a wide horizontal and vertical listening window.
While other crossover designers consider just frequency response on one axis (the sweet spot), we consider the speaker's response in both the time and frequency domains, at a very wide range of angles in both the vertical and horizontal planes—thus optimizing the speaker's three-dimensional response and improving its on-axis sound. This uniquely sophisticated crossover is critically tuned through both psychoacoustic listening analysis and complex computer analysis. And here’s the benefit: regardless of where the speaker is located in the room, or whether it is oriented horizontally or vertically, listeners will hear superior imaging and sound quality, with remarkable clarity both on and off axis.
HIGH-PERFORMANCE SPEAKER DRIVERS
Using the same tweeter as M&K's top-of-the-line Satellite speakers, the Surround-550THX achieves exceptional smoothness and clarity of high frequencies. Other manufacturers’ surround channel speakers typically use drivers of lower quality than those found in their main speakers, resulting in significantly lower sound quality. Because we use the same drivers in the Surround-550THX, LCR-750THX, and Center-750THX, the complete 750THX system achieves an excellent timbre match and seamless 360 degree sound.
For easy installation, the cabinet has integral mounts for M&K's corner and wall mounting brackets and ST speaker stands (and Omnimounts). Dimensions are 10 1/4" H x 7" W 8 3/4" D and weight is 9 lbs.
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