KEF Q150 vs. MartinLogan Motion 2i

KEF Q150 Bookshelf Speakers MartinLogan Motion 2i Bookshelf Speakers
$600 $200
Dimensions (H × W × D)
11.92” × 7.08” × 10.94”
303mm × 180mm × 278mm
10.00” × 4.70” × 4.60”
254mm × 119mm × 117mm
Power Type
Passive Passive
Frequency Response
51-28,000 Hz 110-23,000 Hz
ASR Score
4.8 n/a
ASR Score w/Subwoofer
6.9 n/a

Key Takeaways

TLDR Summary: In the realm of bookshelf speakers, the KEF Q150 and MartinLogan Motion 2i serve as two distinct sonic landmarks. The Q150, with its Uni-Q driver array, offers a cohesive and wide soundstage, fostering an immersive listening experience that belies its modest size. Conversely, the Motion 2i's Folded Motion tweeter provides a crisp, precise high-end, ensuring articulate and vivid details. Both systems balance sound with unique flair, the KEF championing a more integrated approach while the MartinLogan affords a sharp and dynamic presentation. Choosing between them is a matter of taste, room acoustics, and partnering electronics.

Speaker Comparison

When we immerse ourselves in the world of high-fidelity audio, the choices can be vast and daunting. Yet, two standout contenders in the bookshelf speaker category are the KEF Q150 and the MartinLogan Motion 2i. These two offer very different listening experiences, and as we delve into their respective sounds and features, we begin to understand that choosing between them is as much about personal preference as it is about specifications.

Design and Build Quality

The KEF Q150 boasts a sleek, minimalist design with its Uni-Q driver array being the star of the show. This patented technology by KEF positions the tweeter in the acoustic center of the midrange cone for a more detailed and integrated sound. The Q150's sturdy MDF construction and seamless vinyl finish not only give it an elegant appearance but also contribute to its excellent acoustic performance. In contrast, the MartinLogan Motion 2i features a unique folded motion tweeter, which is their hallmark. The glossy finish and curved lines of the Motion 2i bring a modern aesthetic to the room. Both brands have managed to create speakers that not only sound fantastic but can also serve as visual centerpieces in any audiophile's collection.

KEF Q150 Bookshelf Speakers
KEF Q150 arrow (at

Sound Performance

The sound signature of the KEF Q150 is characterized by a broad soundstage and a cohesive sonic image, thanks to the concentric driver design. It delivers a neutral and balanced sound that is both articulate and dynamic, making it a versatile choice for a variety of genres. On the other hand, the MartinLogan Motion 2i impresses with its astonishing high-frequency detail and transparency, attributed to its unique tweeter design. The Motion 2i also provides a slightly warm midrange, lending a pleasant character to vocals and acoustic instruments.

When it comes to bass response, the Q150s might surprise listeners with their ability to deliver low frequencies with authority, despite their modest size. The ported design aids in extending the bass reach, though they may still benefit from pairing with a subwoofer for those who crave a more earth-shattering bass experience. The MartinLogan Motion 2i, while commendable in its midrange, requires a bit more support in the bass department. They're capable of providing clear and articulate bass but might fall short in depth and power compared to the Q150s.

MartinLogan Motion 2i Bookshelf Speakers
MartinLogan Motion 2i arrow (at

Room Integration and Placement

KEF's Q150 speakers are relatively forgiving when it comes to placement, performing well in various room sizes and configurations. Their sound dispersion is quite wide, and listeners can enjoy a consistent audio experience even off-axis. This makes them a strong candidate for those who may not have the luxury of a dedicated listening space and need versatility in speaker placement. MartinLogan's Motion 2i, however, demands more attention to placement to truly shine. The distinct directional properties of the folded motion tweeter means that finding the sweet spot is key for achieving the optimal listening experience.

Given these differences, one might choose the KEF Q150 for a more straightforward setup that rewards the listener with a bigger sweet spot and more room-friendly sound. In contrast, an audiophile who loves tinkering with speaker placement to extract every last ounce of performance might be drawn to the precise and detailed nature of the MartinLogan Motion 2i.

Ultimately, the choice between the KEF Q150 and the MartinLogan Motion 2i bookshelf speakers comes down to one's personal preference in sound signature and room integration. Both offer exceptional clarity and an engaging listening experience, but they do so in very different ways. The KEF Q150s may be the go-to for those who value a wide soundstage and bass response, while the MartinLogan Motion 2i could be the darling of listeners who prioritize high-frequency detail and a warm midrange. No matter the choice, both are worthy contenders in the world of high-fidelity bookshelf speakers.

Check Current Prices:

KEF Q150 Bookshelf Speakers
KEF Q150 Bookshelf Speakers
MartinLogan Motion 2i Bookshelf Speakers
MartinLogan Motion 2i 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.