MartinLogan Motion 15i vs. Polk Audio TSi200

MartinLogan Motion 15i Bookshelf Speaker Polk Audio TSi200 Bookshelf Speakers
$900 $300
Dimensions (H × W × D)
11.40” × 6.80” × 9.50”
290mm × 173mm × 241mm
15.44” × 8.00” × 11.75”
392mm × 203mm × 298mm
Power Type
Passive Passive
Frequency Response
60-25,000 Hz 50-24,000 Hz

Key Takeaways

TLDR Summary: In the realm of audiophile bookshelf speakers, MartinLogan's Motion 15i and Polk Audio's TSi200 present a study in contrast. The Motion 15i, with its luscious Folded Motion tweeter, offers a brilliantly detailed soundscape, excelling in clarity and imaging for the discerning listener. Meanwhile, the TSi200, showcasing Polk's dynamic balance drivers, delivers robust and warm sound, packing a punch in the lower frequencies. The 15i leans towards precision and nuance, while the TSi200 offers an energetic performance at a more accessible price point. Your choice hinges on whether you prioritize auditory finesse or muscular versatility.

Speaker Comparison

When it comes to selecting the right bookshelf speakers for your audiophile-grade sound system, the landscape is rich with options that cater to different tastes and budgets. Among the myriad of choices, the MartinLogan Motion 15i and the Polk Audio TSi200 stand out as two noteworthy contenders worth considering. While they both aim to deliver high-quality sound, they do so with distinct philosophies in design, driver technology, and overall sonic presentation.

MartinLogan's Motion 15i: A Leap in Electrostatic Clarity

MartinLogan is renowned for blending the articulate detail of electrostatic panels with the robustness of traditional drivers, and the Motion 15i epitomizes this approach. The Motion 15i features MartinLogan's signature Folded Motion tweeter, which employs a large surface area to squeeze the air and create sound with remarkably low distortion. This results in a crystalline treble that reveals the subtle textures in music with a transparency that's hard to rival. The Motion 15i's 5.25-inch aluminum cone woofer complements this with tight, well-controlled bass that, while not room-shaking, is precise and integrates seamlessly with the mids and highs.

MartinLogan Motion 15i Bookshelf Speaker
MartinLogan Motion 15i arrow (at

Polk Audio's TSi200: Traditional Dynamics Meet Modern Finesse

On the other side of the spectrum, Polk Audio's TSi200 is a more traditional speaker that relies on tried-and-true dynamic driver technology. The TSi200 houses a 1-inch silk/polymer composite dome tweeter, which offers a smooth and refined high-frequency response, and a pair of 5.25-inch bi-laminate organic fiber cone woofers that deliver a warm and rich bass. The TSi200's sound is characterized by a robust midrange that makes vocals stand out, and while it might not match the airy detail of the MartinLogan's, it offers a compelling richness that is immensely satisfying.

Design and Build: The Aesthetic Divide

In terms of design, the Motion 15i boasts a sleek, modern aesthetic with its high-gloss finish and distinct curved top panel that is both visually striking and functional, reducing diffraction effects for clearer sound staging. The build quality is exceptional, imparting a premium feel that is expected at its price point. Conversely, Polk Audio's TSi200 opts for a more conservative look, with wood grain vinyl finishes that evoke a classic vibe. The TSi200's build is solid, but it doesn't radiate the same level of opulence as the Motion 15i. For some, the choice may come down to which speaker better complements their room's decor.

Polk Audio TSi200 Bookshelf Speakers
Polk Audio TSi200 arrow (at

When discussing the soundstage and imaging capabilities of both speakers, the MartinLogan Motion 15i again takes the lead. The precise engineering of its Folded Motion tweeter and the careful alignment of the woofer create a wide and enveloping soundstage with pinpoint imaging. One can easily close their eyes and point to the exact location of each instrument in the mix. The Polk TSi200, though competent in its own right, delivers a more modest soundstage with a pleasing sense of depth, but it might struggle to compete with the holographic effect projected by the Motion 15i.

Performance Considerations

In terms of amplifier pairing, the MartinLogan Motion 15i can be somewhat more demanding. With a sensitivity rating of 92 dB and a nominal impedance of 5 ohms, they require a robust amplifier that can handle their nuances and control their dynamic drivers without strain. The Polk Audio TSi200, however, sports a more forgiving 8-ohm impedance and a sensitivity of 89 dB, making them easier to drive with a wider range of amplifiers, including entry-level models, which can be a significant advantage for those building their first high-fidelity system.

Cost is often a decisive factor, and the MartinLogan Motion 15i speakers are positioned at a notably higher price point than the Polk Audio TSi200. This differential is reflective of the MartinLogan's advanced driver technology, superior build quality, and acoustic performance. For those seeking top-tier audio reproduction and who are willing to invest in the accompanying high-quality components, the Motion 15i could be a worthwhile expenditure. Conversely, the TSi200 speakers provide solid performance at a more accessible price, making them an attractive option for those who are budget-conscious but still crave high-quality audio.

Ultimately, the choice between the MartinLogan Motion 15i and the Polk Audio TSi200 bookshelf speakers will come down to personal preferences in sound signature, design, system compatibility, and budget. The Motion 15i offers an exquisite and detailed audio experience for the discerning listener who desires the pinnacle of clarity and realism. In contrast, the TSi200 delivers a warm and inviting sound that can be the heart of a home audio system without breaking the bank. Whatever your choice, both speakers represent their brands' commitment to enriching the world of high-fidelity audio for music enthusiasts everywhere.

Check Current Prices:

MartinLogan Motion 15i Bookshelf Speaker
MartinLogan Motion 15i Bookshelf Speaker
Polk Audio TSi200 Bookshelf Speakers
Polk Audio TSi200 Bookshelf Speakers

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Disclaimer: the speaker data listed on this website are correct to the best of our knowledge, but we do not guarantee the accuracy of the data. Please double-check any measurements with the manufacturer before making a final purchasing decision.