MartinLogan Motion 40i vs. Micca RB42

MartinLogan Motion 40i Tower Speaker Micca RB42 Reference Bookshelf Speakers
$2600 $150
Dimensions (H × W × D)
42.50” × 7.60” × 12.80”
1080mm × 193mm × 325mm
8.70” × 4.90” × 7.90”
221mm × 124mm × 201mm
Power Type
Passive Passive
Frequency Response
40-25,000 Hz 50-20,000 Hz
ASR Score
n/a 4.4
ASR Score w/Subwoofer
n/a 6.6

Key Takeaways

TLDR Summary: In the battle of finesse versus function, the MartinLogan Motion 40i brings an articulate soundstage with its unique electrostatic tweeter, offering a detailed and airy high-end. The Motion 40i's larger form factor and sophisticated design cater to audiophiles seeking a premium listening experience. Conversely, the Micca RB42 serves as an entry-level champ, boasting a compact footprint with surprising bass response and clarity for its size, ideal for casual listeners or those with space constraints. While both appeal to different ends of the market, each delivers exceptional value in its respective class.

Speaker Comparison

As we embark on a sonic journey to explore the intricacies of sound reproduction, we must acknowledge that speakers are not just created, they are sculpted by sound artisans. In this comparative analysis, I'll dive into the details of two distinct classes of speakers: the MartinLogan Motion 40i Tower Speaker and the Micca RB42 Reference Bookshelf Speaker. Both have their unique place in the pantheon of high-fidelity audio, yet they cater to different audiences and listening preferences.

The Aesthetics and Presence

Firstly, let's admire the stature and beauty of the MartinLogan Motion 40i. As a tower speaker, it commands a presence in the room, not only with its size but also with its sleek design. The Motion 40i is a piece of art that merges with your living space, appealing to those who appreciate visual elegance as much as auditory excellence. On the other hand, the Micca RB42, with its compact form, is a discreet addition to any room. It's built for the listener who prefers subtlety and minimalism, and although it may not make a bold statement in size, it certainly speaks volumes through its performance.

MartinLogan Motion 40i Tower Speaker
MartinLogan Motion 40i arrow (at

The Soundstage and Imaging

Moving on to the soundstage, the MartinLogan Motion 40i, with its larger drivers and sophisticated engineering, produces a vast and immersive soundstage that seems to defy the confines of the listening room. Its ability to place instruments distinctly across a three-dimensional space is nothing short of impressive. In contrast, the Micca RB42, though smaller in stature, exhibits a surprisingly wide soundstage for its size, offering a holographic listening experience that belies its bookshelf category. However, while it performs admirably, the Micca RB42 cannot compete with the grandeur and scale of the Motion 40i's soundstage.

The Technical Aspects

Technically speaking, the MartinLogan Motion 40i is equipped with advanced features such as the Folded Motion XT tweeter, which ensures crisp and clear high frequencies without the harshness that can sometimes plague lesser designs. The Motion 40i seamlessly integrates its drivers to deliver a coherent and articulate sound across the frequency spectrum. Conversely, the Micca RB42, with its silk dome tweeter and 4-inch woofer, offers a balanced and nuanced sound that is remarkable for a speaker of its class. While the RB42 holds its own, the sheer engineering prowess of the MartinLogan provides an audio clarity that is in a different league.

Micca RB42 Reference Bookshelf Speakers
Micca RB42 arrow (at

Bass is another battlefield where these two contenders show their muscle. The MartinLogan Motion 40i's dual 6.5-inch aluminum cone woofers deliver deep and authoritative bass that can fill a room without the need for a subwoofer. Its power and control in the lower frequencies create a full-bodied and satisfying experience. The Micca RB42, on the other hand, surprises with the amount of bass it can muster from its compact form. However, while it's impressive for its size, it cannot match the depth and definition of the Motion 40i's bass prowess.

The Verdict

In conclusion, choosing between the MartinLogan Motion 40i and the Micca RB42 depends largely on the listener's space, budget, and sonic preferences. The Motion 40i is an investment in audio opulence, suitable for the dedicated audiophile seeking an expansive soundstage, exquisite design, and exceptional sound quality. The Micca RB42, conversely, is the workhorse of the discerning listener who desires great sound from a smaller footprint and at a more accessible price point. Both speakers offer distinct advantages and prove that no matter your choice, the love for music and its faithful reproduction is at the heart of the listening experience.

Whether you're drawn to the elegance and acoustic prowess of the MartinLogan Motion 40i or the pragmatic and space-friendly allure of the Micca RB42, remember that the best speaker is not necessarily the one with the most impressive specs, but the one that moves you emotionally and fills your room with joy. After all, isn't that what the art of sound is all about?

Check Current Prices:

MartinLogan Motion 40i Tower Speaker
MartinLogan Motion 40i Tower Speaker
Micca RB42 Reference Bookshelf Speakers
Micca RB42 Reference 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.