MartinLogan Motion 4i vs. Monoprice Monolith THX-265B

MartinLogan Motion 4i Bookshelf Speakers Monoprice Monolith THX-265B Bookshelf Speakers
$250 $800
Dimensions (H × W × D)
12.60” × 5.60” × 5.70”
320mm × 142mm × 145mm
15.40” × 9.70” × 11.40”
391mm × 246mm × 290mm
Power Type
Passive Passive
Frequency Response
70-23,000 Hz 65-24,000 Hz
ASR Score
1.5 n/a
ASR Score w/Subwoofer
5.1 n/a

Key Takeaways

TLDR Summary: In the high-fidelity audio skirmish, the MartinLogan Motion 4i speakers flaunt their exquisite Folded Motion tweeter, delivering a nuanced and airy high-end, with an articulate midrange. They cater to those seeking a refined stereo image and clarity. Meanwhile, the Monoprice Monolith THX-265B bookshelf speakers stand out with THX certification, promising a cinematic experience, robust build, and impactful bass punch. With a more forward sound profile, they're a match for enthusiasts craving a dynamic and authoritative audio presence in home theaters. Both demand consideration, depending on whether your tastes lean towards subtle musicality or blockbuster excitement.

Speaker Comparison

When it comes to setting up the perfect audio sanctuary, the choice of bookshelf speakers becomes a paramount decision for an audiophile. We're delving into a comparative analysis of two formidable options: the MartinLogan Motion 4i and the Monoprice Monolith THX-265B. Both offer distinctive takes on what high-fidelity sound should be, catering to different segments of the audio enthusiast community.

Design Philosophy

The MartinLogan Motion 4i speakers radiate elegance with their slender, minimalist design, making them an attractive addition to any modern living space. The folded motion tweeter, a MartinLogan signature, not only contributes to the sleek look but is also instrumental in delivering crisp highs. Conversely, the Monoprice Monolith THX-265B opts for a more traditional, sturdy build that prioritizes function over form. The black oak vinyl finish gives it a professional, no-nonsense aesthetic that's purely about the acoustics.

MartinLogan Motion 4i Bookshelf Speakers
MartinLogan Motion 4i arrow (at

The compact size of the Motion 4i allows for versatility in placement without sacrificing sound quality. This is a speaker that can fit into tighter spaces, making it ideal for urban dwellings. The Monolith THX-265B, while still categorized as a bookshelf speaker, requires a bit more real estate. It's a speaker that makes its presence known, not just through its size but also with its demanding THX certification, which implies a certain level of performance and room calibration for optimal results.

Sound Signature

The MartinLogan Motion 4i shines with its astonishingly detailed high frequencies, thanks to the innovative folded motion tweeter. Mids are articulate, presenting vocals and instruments with clarity and presence. The lows, while not ground-shaking, are tight and well-defined, which is impressive for speakers of this size. It's a balanced sound that caters to those who appreciate nuance in their listening experience.

In contrast, the Monoprice Monolith THX-265B delivers a sound that's robust and authoritative. The THX certification is not just a badge; it's an assurance of sound that meets stringent standards for cinema-quality audio. The bass response is vigorous, a testament to its well-engineered drivers and cabinet. This speaker is designed to deliver an immersive experience, whether you're watching a blockbuster movie or enveloped in a symphony of orchestral arrangements.

Performance in Practice

When matched in a stereo setup, the MartinLogan Motion 4i speakers provide an impressive soundstage. They create an enveloping atmosphere that draws the listener in, with a transparency that feels almost ethereal. This is a speaker that communicates subtleties and the delicate layers of music with finesse. Despite their relative size, they punch well above their weight, offering a level of detail that can be startlingly revealing.

The Monoprice Monolith THX-265B excels in delivering cinematic thrills. Dialogue is crisp and centered, effects are placed with pinpoint accuracy, and the overall soundstage is wide and engaging. For those looking to replicate the movie theater experience at home, these speakers bring that ambition to fruition. With the volume cranked up, there's no distortion, only the raw power and emotion of the performance, be it a live concert recording or an intense action sequence.

Ultimately, the choice between the MartinLogan Motion 4i and the Monoprice Monolith THX-265B boils down to personal preference and intended use. The Motion 4i is a favorite for those who prefer nuanced audio reproduction in a sleek package, ideal for music aficionados with an ear for detail. The Monolith THX-265B, on the other hand, will satisfy the listener looking for a powerful, room-filling sound that can effortlessly shift from refined musical passages to the explosive dynamics of movie soundtracks.

In conclusion, whether you side with the refined artistry of the MartinLogan Motion 4i or the bold, theater-like prowess of the Monoprice Monolith THX-265B, both speakers stand as testaments to what modern audio engineering can achieve. Each offers a unique path to sonic bliss, ensuring that the journey to finding your perfect acoustic companion is as rewarding as the destination.

Check Current Prices:

MartinLogan Motion 4i Bookshelf Speakers
MartinLogan Motion 4i Bookshelf Speakers
Monoprice Monolith THX-265B Bookshelf Speakers
Monoprice Monolith THX-265B 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.