MartinLogan Motion 15i vs. Polk Audio T15

MartinLogan Motion 15i Bookshelf Speaker Polk Audio T15 Bookshelf Speakers
$900 $150
Dimensions (H × W × D)
11.40” × 6.80” × 9.50”
290mm × 173mm × 241mm
10.63” × 6.50” × 7.25”
270mm × 165mm × 184mm
Power Type
Passive Passive
Frequency Response
60-25,000 Hz 65-20,000 Hz
ASR Score
n/a 0.3
ASR Score w/Subwoofer
n/a 3.3

Key Takeaways

TLDR Summary: In the world of high-fidelity audio, the MartinLogan Motion 15i and Polk Audio T15 bookshelf speakers cater to different ears and budgets. The Motion 15i dazzles with its Folded Motion tweeter, delivering exquisite detail and a spacious soundstage that audiophiles crave, wrapped in a luxurious build. In contrast, the Polk T15 offers an accessible entry point for the casual listener or budget-conscious. It serves up a warm, if less refined, sound with commendable bass for its size. Choosing between them hinges on one's sonic preferences and willingness to invest in acoustic excellence versus affordable competency.

Speaker Comparison

When it comes to selecting bookshelf speakers, audiophiles are often caught in the crossfire of choice, balancing the delicate scales of performance, aesthetics, and budget. The MartinLogan Motion 15i and the Polk Audio T15 are two contending bookshelf speakers that often pop up on the radar of discerning listeners. While the MartinLogan Motion 15i oozes with the brand's audiophile pedigree, offering a taste of high-end fidelity, the Polk Audio T15 appeals as a budget-friendly option that promises a no-frills, solid performance. It's an intriguing matchup that pits refinement against value.

The Heart of Sound: Driver Technology

The MartinLogan Motion 15i speakers are a beautiful example of the brand's innovative approach to sound reproduction. They boast an exotic Folded Motion tweeter, which excels at dispersing sound with precision and minimal distortion. The resulting highs are crisp and detailed, a testament to the care that MartinLogan puts into its driver engineering. The Motion 15i's 5.25-inch aluminum cone woofer complements the tweeter, delivering tight and articulate bass. In contrast, the Polk Audio T15 features a more traditional 0.75-inch silk dome tweeter paired with a 5.25-inch composite driver. While this setup doesn't quite achieve the airy heights of the MartinLogan's Folded Motion tweeter, it still manages to produce a balanced and enjoyable soundstage.

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

Cabinet Craftsmanship and Design

Design-wise, the MartinLogan Motion 15i is a clear step up. Its cabinet not only looks sleek and modern but is also acoustically inert, reducing unwanted resonance. The real-wood veneer finish gives it a touch of class, fitting comfortably into the most sophisticated of listening spaces. The Polk Audio T15, on the other hand, sports a more utilitarian look with its MDF construction and black wood grain finish. It's sturdy and functional, designed to be unobtrusive and blending well into a variety of room decors. What it lacks in high-end materials, it makes up for with robust build quality.

Performance In The Listening Room

In the listening room, the differences between these two bookshelf contenders become even more apparent. The MartinLogan Motion 15i delivers an expansive soundstage and an engaging listening experience that belies its compact size. There's a sense of openness and detail that brings out the nuances in the music, from the delicate strings of a chamber orchestra to the layered textures of electronic soundscapes. The Polk Audio T15, while not as revealing, surprises with its coherence and musicality. It handles a variety of genres with ease, and though it may not dazzle with the utmost clarity, it still maintains a respectable sound that will please most casual listeners.

Polk Audio T15 Bookshelf Speakers
Polk Audio T15 arrow (at

When it comes to power handling and efficiency, the MartinLogan Motion 15i shows off its pedigree once again. With a recommended amplifier power of up to 200 watts per channel, these speakers can soar to high volumes without breaking a sweat. Their sensitivity rating of 92 dB ensures that they can be driven by even modest amplifiers to satisfying levels. The Polk Audio T15, with a recommended amplifier power of 20-100 watts per channel and a sensitivity of 89 dB, is less demanding and can perform admirably with entry-level receivers, making it an ideal choice for those starting their home audio journey.

The price point is another critical factor in this comparison. The MartinLogan Motion 15i sits at a higher price bracket, reflecting its premium construction and sound quality. It's an investment for those who prioritize audio fidelity and are willing to pay for that leap in performance. The Polk Audio T15, conversely, is positioned as an affordable entry into the world of home audio. Its cost-effectiveness is a huge draw, offering a compelling balance between performance and price for the budget-conscious consumer.

In conclusion, choosing between the MartinLogan Motion 15i and the Polk Audio T15 bookshelf speakers comes down to individual priorities. For the audiophile seeking a taste of the high-end without the towering price, the Motion 15i is a standout choice. Its exceptional sound quality and elegant design are hard to overlook. The Polk Audio T15, though, is a testament to the fact that good sound doesn't have to be expensive, offering a warm and enjoyable listening experience that's accessible to all. Both speakers make a strong case in their respective categories, ensuring that whether your wallet is thick or thin, your music will always find a way to sing.

Check Current Prices:

MartinLogan Motion 15i Bookshelf Speaker
MartinLogan Motion 15i Bookshelf Speaker
Polk Audio T15 Bookshelf Speakers
Polk Audio T15 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.