KEF Q150 vs. MartinLogan Motion 35XTi

KEF Q150 Bookshelf Speakers MartinLogan Motion 35XTi Bookshelf Speaker
$600 $1500
Dimensions (H × W × D)
11.92” × 7.08” × 10.94”
303mm × 180mm × 278mm
13.50” × 7.60” × 11.80”
343mm × 193mm × 300mm
Power Type
Passive Passive
Frequency Response
51-28,000 Hz 50-25,000 Hz
ASR Score
4.8 n/a
ASR Score w/Subwoofer
6.9 n/a

Key Takeaways

TLDR Summary: The KEF Q150 and MartinLogan Motion 35XTi bookshelf speakers represent a clash of titans in the realm of high-end audio. The Q150 boasts KEF's renowned Uni-Q driver, delivering a seamless and cohesive soundstage with a sleek, minimalist design. In contrast, the Motion 35XTi features MartinLogan's signature Folded Motion tweeter for an exquisitely detailed high-frequency response, wrapped in a sophisticated cabinet. With the KEF excelling in uniform dispersion and the MartinLogan offering breathtaking detail, choosing between these two often boils down to personal sonic preference and aesthetic appreciation. Both are sterling choices for any discerning audiophile's sanctuary.

Speaker Comparison

When it comes to filling a room with sound, both the KEF Q150 and the MartinLogan Motion 35XTi bookshelf speakers offer audiophiles a chance to experience high-fidelity audio in a moderately-sized package. Right out of the gate, these two contenders may seem to cater to the same consumer, but dive a little deeper, and you'll find that they each sing a tune that speaks to distinctly different ears and rooms.

The Aesthetic Appeal

KEF's Q150 speakers carry a minimalist charm that is both modern and understated. The signature Uni-Q driver array, which positions the tweeter concentrically within the midrange/bass driver, not only gives a unique look but also aids in sound dispersion. In contrast, the Motion 35XTi from MartinLogan makes a bolder statement with its distinct folded motion tweeter and a larger cabinet size. The premium finishes and the sculptural design of the MartinLogan could be seen as more visually striking, making it a statement piece in any audiophile's listening space.

KEF Q150 Bookshelf Speakers
KEF Q150 arrow (at

The Sonic Signature

When it comes to sound, the KEF Q150s are known for their smooth and coherent soundstage, thanks to the aforementioned Uni-Q driver. This has the effect of creating a listening experience that is detailed and uniform across the room. The MartinLogan Motion 35XTi, on the other hand, boasts an incredible top-end detail and airiness due to its folded motion tweeter, which tends to articulate the micro-dynamics in music with precision and a sense of ease. The bass response, too, is notably taut and well-defined on the 35XTi, making them particularly well-suited for listeners who crave clarity and depth in the lower frequencies.

Power and Placement

Both of these bookshelf speakers react differently to room placement and amplification. The KEF Q150s are quite forgiving and versatile, performing admirably in a variety of settings. They are less demanding when it comes to amplifier power, making them a great fit for those with modest setups. In contrast, the MartinLogan Motion 35XTi, with its larger drivers and more complex crossover, demands a bit more power from an amplifier to truly shine. Additionally, they benefit from careful placement within a room to optimize the performance of the high-end tweeter and to manage their more pronounced bass response.

MartinLogan Motion 35XTi Bookshelf Speaker
MartinLogan Motion 35XTi arrow (at

Regarding connectivity and ease of integration, both the KEF and MartinLogan models offer standard binding posts that support banana plugs, spades, or bare wire connections. The KEF Q150 may have a slight edge in terms of simplicity and adaptability, while the Motion 35XTi may require a bit more attention to detail concerning partnering electronics and cabling to extract the best performance.


In the end, choosing between the KEF Q150 and the MartinLogan Motion 35XTi bookshelf speakers comes down to personal preference and intended use. The KEF Q150s excel as all-rounders that can accommodate most genres of music with ease and grace, making them suitable for a wide variety of listeners. The MartinLogan Motion 35XTi speakers, however, appeal to the discerning ear that values precision, high-frequency sparkle, and a robust presentation, especially if paired correctly with amplification and positioned deliberately within the listening space.

So whether you’re looking to get lost in the warmth and detail of a string quartet or feel the pulse of an electronica track, your choice between the KEF Q150 and the MartinLogan Motion 35XTi will ultimately dictate the landscape of your auditory expedition. One thing is for certain, though: neither will disappoint the true audiophile dedicated to the pursuit of sonic excellence.

Check Current Prices:

KEF Q150 Bookshelf Speakers
KEF Q150 Bookshelf Speakers
MartinLogan Motion 35XTi Bookshelf Speaker
MartinLogan Motion 35XTi Bookshelf Speaker

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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.