MartinLogan Motion 20i vs. MartinLogan Motion 40i

MartinLogan Motion 20i Tower Speaker MartinLogan Motion 40i Tower Speaker
$2000 $2600
Dimensions (H × W × D)
36.60” × 6.80” × 11.70”
930mm × 173mm × 297mm
42.50” × 7.60” × 12.80”
1080mm × 193mm × 325mm
Power Type
Passive Passive
Frequency Response
46-25,000 Hz 40-25,000 Hz

Key Takeaways

TLDR Summary: The MartinLogan Motion 20i and 40i tower speakers embody hi-fi excellence, each catering to different audiophile preferences. The 20i, compact and versatile, delivers pristine clarity with its Folded Motion tweeter and dual woofers, ideal for modestly-sized rooms. The 40i, however, steps up with a larger footprint, additional woofer, and deeper bass extension, suited for spacious areas and listeners yearning for more robust soundscapes. Both offer MartinLogan's signature airy highs and precise imaging, with the 40i taking the edge in power and presence. Choosing between them hinges on room size, sonic appetite, and willingness to invest in the aural landscape.

Speaker Comparison

When it comes to sound, the devil is in the details, and that's precisely where MartinLogan’s Motion series stand tall. The Motion 20i and 40i tower speakers are two prime offerings that showcase the brand's commitment to audiophile-grade performance. At first glance, one could be forgiven for thinking the two siblings share more than a family resemblance; they are cut from the same cloth but with some distinct differences woven into their acoustic fabrics.

Design and Build: Aesthetics Meets Acoustics

The Motion 20i and 40i are built with the same meticulous attention to detail that MartinLogan is known for. Each model sports the signature MartinLogan Folded Motion tweeter, which ensures a lightning-fast response that can keep up with the most dynamic musical passages. The Motion 20i is the more compact of the two, standing at a modest 36.6 inches tall, while the Motion 40i towers at 42.5 inches, making it the more imposing figure in the lineup. Both models exude elegance, but the increased size of the 40i suggests a promise of a fuller soundstage and deeper bass response.

MartinLogan Motion 20i Tower Speaker
MartinLogan Motion 20i arrow (at

Performance: Nuance Meets Power

The Motion 20i is a commendable performer, with its dual 5.5-inch aluminum cone woofers delivering clear and concise bass. However, the Motion 40i steps up the game with its larger cabinet and a trio of drivers: one Folded Motion tweeter and two 6.5-inch aluminum cone woofers. This configuration not only lends the 40i more low-end heft but also contributes to a larger sweet spot and a more enveloping sound.

Listening to the Motion 20i, you're immediately struck by the precision of the mids and the highs, a testament to the prowess of the Folded Motion tweeter. The bass is tight and accurate, if not earth-shattering. Shift to the Motion 40i, and the room fills with a more expansive sound. There's a palpable depth to the audio that the 20i, though commendable in its performance, cannot quite match. The 40i's additional woofer and larger volume create a visceral listening experience that's both richer and more immersive.

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

Matching with Amplifiers: Sensitivity and Power Handling

Both the Motion 20i and the 40i are relatively easy to drive, with sensitivity ratings of 90 dB and 92 dB, respectively. This means that they don't require a monstrous amplifier to reach satisfying volume levels. However, thanks to their power handling capabilities, they also won't shy away from a more robust amp. The Motion 20i can handle up to 200 watts, while the 40i can accommodate up to 300 watts. The 40i's higher power handling is a boon for audiophiles who love to push their systems without hitting the ceiling of distortion.

The truth is, the choice between the Motion 20i and the 40i might come down to the size of your room and the kind of dynamics you're looking to achieve. In a smaller space, the 20i could very well provide the sweet spot of performance without overwhelming the room. However, if you have the luxury of a larger listening area and crave that full-range sound that can fill every corner with lifelike audio, the 40i is likely the speaker to gravitate towards.

At the end of the day, whether you opt for the MartinLogan Motion 20i or the larger 40i, you're getting a speaker that's been crafted with an unwavering dedication to sonic excellence. Each brings to the table a distinct flavor of the MartinLogan ethos, with the 40i edging forward in terms of power and presence. It comes down to nuances and the type of listening experience you desire. But rest assured, with either choice, you’ll be enveloped in the lush landscapes of sound that only MartinLogan can paint.

Check Current Prices:

MartinLogan Motion 20i Tower Speaker
MartinLogan Motion 20i Tower Speaker
MartinLogan Motion 40i Tower Speaker
MartinLogan Motion 40i Tower Speaker

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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.