MartinLogan Motion 6i vs. Monoprice Monolith THX-365C

MartinLogan Motion 6i Center Channel Speaker Monoprice Monolith THX-365C Center Channel Speaker
$300 $500
Dimensions (H × W × D)
5.20” × 17.50” × 4.00”
132mm × 444mm × 102mm
9.70” × 22.90” × 10.80”
246mm × 582mm × 274mm
Power Type
Passive Passive
Frequency Response
120-23,000 Hz 65-24,000 Hz

Key Takeaways

TLDR Summary: In the arena of center channel speakers, the MartinLogan Motion 6i presents with its Folded Motion tweeter, offering precise highs and a sleek design, while the Monoprice Monolith THX-365C delivers with THX certification and a robust, no-compromise build. The Motion 6i excels in clarity and aesthetic appeal for those seeking articulate dialog in a refined package. Conversely, the THX-365C is the powerhouse choice for home theater enthusiasts craving immersive, room-filling sound that meets strict THX standards. Both offer distinct audio signatures and build qualities tailored to different listener preferences and room requirements.

Speaker Comparison

When it comes to the art of constructing a home theater system that truly resonates with the human spirit, the choice of a center channel speaker stands as one of the most critical decisions for an audiophile. In the arena of high-fidelity sound reproduction, both the MartinLogan Motion 6i and the Monoprice Monolith THX-365C have staked their claims, beckoning enthusiasts with their unique offerings. The choice between these two centers is less a matter of comparing apples to apples and more about understanding the unique flavor each brings to the table.

The Soundstage Connoisseur: MartinLogan Motion 6i

At the heart of the MartinLogan Motion 6i Center Channel Speaker lies a lush and expansive soundstage, woven into existence by its Folded Motion tweeter. This distinctive driver design is renowned for its lightning-fast response and precision, crucial elements that ensure dialogue in movies crisply cuts through even the most complex soundtracks. The Motion 6i delivers a sound that is both sweet and articulate, a testament to its audiophile-grade pedigree.

MartinLogan Motion 6i Center Channel Speaker
MartinLogan Motion 6i arrow (at

Complementing the tweeter, the speaker employs a pair of aluminum cone woofers, which work in harmony to produce a balanced midrange. The Motion 6i doesn't just speak; it enunciates, ensuring that every word and note is chiseled with clarity. This is a center channel that doesn't merely aim to be heard — its goal is to be understood, making it ideal for the discerning listener who values nuanced articulation in their cinematic and musical experiences.

The Powerhouse Performer: Monoprice Monolith THX-365C

Enter the Monoprice Monolith THX-365C, a behemoth poised to dominate the soundscape with its sheer acoustic might. Certified by THX, this center channel is engineered to meet rigorous performance standards, providing an assurance of volume and clarity even in larger rooms. With the Monolith, Monoprice delivers a speaker that revels in its power and control, capable of handling the thunderous peaks and subtle whispers of blockbuster films with equal aplomb.

Featuring two 6.5-inch woofers and a 2-inch silk dome midrange driver, the Monolith THX-365C creates a wall of sound that's both expansive and precise. The speaker's design focuses on delivering a direct and impactful audio experience, with a sound signature that's bold and assertive. In contrast to the MartinLogan, the Monolith revels in its brute force, yet it does so without sacrificing the finer details essential for true audio fidelity.

The Aesthetic and Practicality Divide

Aesthetics play a non-trivial role in the choice between these two center channel titans. The sleek, modern design of the MartinLogan Motion 6i, with its compact form factor and high-gloss finish, makes it a visually appealing addition to any living space. It speaks to those who appreciate a blend of form and function, where the speaker serves as both a source of exquisite sound and a seamless extension of their home décor.

The Monoprice Monolith THX-365C, on the other hand, is built like a fortress, with a no-nonsense, utilitarian design that prioritizes performance over polish. It's larger, heftier, and demands more space, potentially challenging for those with limited real estate or a preference for subtler visual statements. What it lacks in elegance, it more than compensates for with its authoritative presence and the promise of an immersive audio experience.

The Verdict: A Harmony of Differences

In the final analysis, the duel between the MartinLogan Motion 6i and the Monoprice Monolith THX-365C is not simply a battle of specs and numbers. Instead, it's a philosophical divide, a choice between the ethereal and the earthly. The Motion 6i center channel is for those who seek an audio experience that's as refined as a well-aged Scotch, offering a taste that's complex yet mellow, with a bouquet that lingers in the mind long after the sound has faded.

Conversely, the Monoprice Monolith THX-365C is the choice for the listener who demands a robust sonic foundation, a speaker that delivers the full-bodied flavor of sound with the impact of a finely tuned orchestra. It's for the audiophile who wants their senses not just stirred but shaken, craving a visceral encounter with their media. In choosing between these two, the listener must not only consider their room's acoustics but also reflect on their personal sound ethos.

Check Current Prices:

MartinLogan Motion 6i Center Channel Speaker
MartinLogan Motion 6i Center Channel Speaker
Monoprice Monolith THX-365C Center Channel Speaker
Monoprice Monolith THX-365C Center Channel Speaker

Affiliate Disclosure: As an Amazon Associate, we earn from qualifying purchases.

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.