MartinLogan Motion 15i vs. Triangle Borea BR03

MartinLogan Motion 15i Bookshelf Speaker Triangle Borea BR03 Bookshelf Speakers
$900 $630
Dimensions (H × W × D)
11.40” × 6.80” × 9.50”
290mm × 173mm × 241mm
14.96” × 8.11” × 12.36”
380mm × 206mm × 314mm
Power Type
Passive Passive
Frequency Response
60-25,000 Hz 46-22,000 Hz
ASR Score
n/a 4.2
ASR Score w/Subwoofer
n/a 6.5

Key Takeaways

TLDR Summary: In the thrilling face-off between the MartinLogan Motion 15i and Triangle Borea BR03 bookshelf speakers, audiophiles are treated to a sonic spectacle. The Motion 15i, with its Folded Motion tweeter, delivers an exquisitely detailed treble that captures the airiness of live performances. Meanwhile, the Borea BR03 counters with a rich, dynamic midrange and punchy bass, courtesy of its well-engineered driver array. Both boast stellar build quality and room-filling capabilities, but the choice ultimately hinges on listener preference: the MartinLogan's analytical precision or the Triangle's warm, engaging soundstage. Each offers a distinct window into music's soul, captivating ears and hearts alike.

Speaker Comparison

When it comes to high-fidelity audio, the landscape is rich with innovative designs and technologies, each vying to please the discerning ears of audiophiles around the world. Today, we find ourselves comparing two rather remarkable bookshelf speakers: the MartinLogan Motion 15i and the Triangle Borea BR03. Both units are considered exceptional performers in their class, but they approach the holy grail of sound reproduction with distinct philosophies and acoustic characteristics that merit a deep dive.

The Aesthetic and Build

First impressions can be telling, and in the case of the MartinLogan Motion 15i speakers, the sleek design and precision engineering are immediately evident. With their signature folded motion tweeter and meticulous craftsmanship, these speakers exude a contemporary elegance that meshes well with modern interiors. Contrastingly, the Triangle Borea BR03s offer a more traditional look, with their lovely wood veneer finishes and classic driver layout. Both sets of speakers are impeccably constructed, but the Motion 15i's unique design may appeal to those looking for a speaker that doubles as a conversation piece.

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

Sound Signature and Performance

The MartinLogan Motion 15i's high-frequency performance is a standout feature, thanks to their folded motion tweeter that provides a lightning-fast response with minimal distortion. The result is a crystal-clear treble that captures the nuances of cymbals and string instruments with an almost tactile precision. In contrast, the Triangle Borea BR03 utilizes a more conventional dome tweeter, but it's no slouch either. Triangle's engineering delivers a smooth and natural treble that's easy to listen to for extended periods without fatigue, making the BR03s a joy for long listening sessions.

When we delve into the midrange, the Motion 15i continues to impress with its articulate and detailed presentation. Vocals and acoustic instruments are reproduced with a palpable presence that is both engaging and accurate. The Borea BR03, on the other hand, provides a warm and rich midrange that lends a certain sweetness to vocals and a full-bodied character to the music. This warmth makes the BR03 an excellent match for genres that benefit from a bit of midrange emphasis, such as jazz and classical.

Triangle Borea BR03 Bookshelf Speakers
Triangle Borea BR03 arrow (at

Bass Response and Power Handling

Bass response is another area where these two contenders diverge. The MartinLogan Motion 15i sports a modest 5.25-inch aluminum cone woofer that delivers tight and controlled bass. While it won't shake the foundations, the bass is precise and integrates smoothly with the midrange and treble. For serious bass enthusiasts, a subwoofer would complement the Motion 15i nicely. The Triangle Borea BR03, with its larger 6.5-inch driver, has a more pronounced low-end. It digs deeper into the bass frequencies and provides a more substantial rumble that can be felt as well as heard, even without a subwoofer.

In terms of power handling, both speakers are relatively efficient and can be driven by modest amplifiers. However, the Motion 15i's 92dB sensitivity allows it to make the most of the power it receives, making it ideal for those with lower-powered amps. The BR03 has a lower sensitivity at 90dB but can still perform admirably without a powerhouse amp. It's worth noting that both speakers benefit from high-quality amplification—clean, distortion-free power will allow them to perform at their best.


In conclusion, the MartinLogan Motion 15i and Triangle Borea BR03 bookshelf speakers cater to different tastes and priorities in the audiophile world. The Motion 15i stands out with its distinct design and exceptional high-frequency clarity, while the BR03 shines with its warm midrange and robust bass performance. Ultimately, the choice between these two stellar performers will come down to personal preference and the specific requirements of one's listening space and system. Whichever path you choose, both speakers promise to elevate your listening experience to new heights of sonic pleasure.

Check Current Prices:

MartinLogan Motion 15i Bookshelf Speaker
MartinLogan Motion 15i Bookshelf Speaker
Triangle Borea BR03 Bookshelf Speakers
Triangle Borea BR03 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.