Audioengine A2+ vs. MartinLogan Motion 4i

Audioengine A2+ Wireless Bluetooth Speakers MartinLogan Motion 4i Bookshelf Speakers
$270 $250
Dimensions (H × W × D)
6.00” × 4.00” × 5.25”
152mm × 102mm × 133mm
12.60” × 5.60” × 5.70”
320mm × 142mm × 145mm
Power Type
Powered Passive
Frequency Response
65-22,000 Hz 70-23,000 Hz
ASR Score
n/a 1.5
ASR Score w/Subwoofer
n/a 5.1

Key Takeaways

TLDR Summary: In the compact speaker arena, Audioengine's A2+ Wireless units offer a blend of versatility and performance, with Bluetooth connectivity elevating their appeal for seamless streaming. Their sound is rich and surprisingly full-bodied for their size, particularly in the midrange. On the other hand, the MartinLogan Motion 4i speakers, while lacking wireless features, present an audiophile-grade listening experience with their distinctive Folded Motion tweeters, providing exceptional clarity and a wide soundstage. Despite their differing feature sets, both sets of speakers pack a punch for their size, but the MartinLogan's cater to a purist approach to sound.

Speaker Comparison

In the realm of compact speakers that aim to deliver an outsized audio performance, the Audioengine A2+ Wireless Bluetooth Speakers and MartinLogan Motion 4i Bookshelf Speakers stand out as two prominent contenders. These speakers hail from different backgrounds, with Audioengine focusing on versatility and connectivity and MartinLogan renowned for its audiophile-grade engineering. Despite their common goal of enriching the listening experience, their approaches are distinct and cater to different types of audio aficionados.

Design Philosophy and Build

Audioengine's A2+ speakers embody a sleek and minimalist design that is both modern and space-efficient. The build quality is robust, with a dense wooden cabinet that resonates with the company's dedication to both aesthetics and acoustic performance. On the other hand, the MartinLogan Motion 4i maintains a more distinctive approach, flaunting the brand's iconic perforated steel grille and the trademarked Folded Motion tweeter. The build here is more aligned with classic hi-fi traditions, yet it carries an air of contemporary finesse.

Audioengine A2+ Wireless Bluetooth Speakers
Audioengine A2+ arrow (at

Sound Signature and Performance

When it comes to auditory character, the A2+ prides itself on a well-rounded sound profile that is surprisingly full for its size. With a 2.75-inch Kevlar woofers and silk dome tweeters, the A2+ offers a balanced mix with commendable clarity. Despite the absence of a dedicated subwoofer, bass depth is respectable, though it may not satisfy those seeking a room-shaking experience. The Motion 4i, conversely, dazzles with its Folded Motion tweeter, delivering a sound that is crisp and detailed, with a level of precision that is particularly noticeable in the high frequencies. The speaker's larger 4-inch aluminum cone woofer manages to produce more substantial bass, though its performance can still benefit from a subwoofer in larger rooms.

The Audioengine A2+ Wireless delivers convenience with its Bluetooth functionality, making it ideal for users who prioritize ease of streaming from various devices. The addition of a built-in digital-to-analog converter (DAC) enhances the sound quality from digital audio sources, making these speakers a great all-in-one solution for a variety of listening scenarios. Conversely, the Motion 4i lacks wireless connectivity, focusing instead on traditional wired connections, which can be seen as a boon or a setback depending on the user's needs. Audiophiles might appreciate the purity of a wired connection while tech-savvy users may miss the convenience of wireless streaming.

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

Integration and Versatility

One of the standout features of the A2+ is its versatility. The inclusion of multiple inputs and outputs, including a USB audio input, dual analog audio inputs, and a variable RCA output for an optional subwoofer, means these speakers can easily become the hub of a multimedia setup. This plug-and-play philosophy extends to its compatibility with various devices, negating the need for a separate amp or receiver. The Motion 4i, while lacking such connectivity features, shines when integrated into a dedicated hi-fi system, especially when paired with quality components that can maximize its audio potential.

Both speaker sets are relatively compact, but the A2+ is particularly small, which means they can fit into tighter spaces. This makes them ideal for desktop use or smaller rooms where space is at a premium. The Motion 4i, while still considered compact in the world of bookshelf speakers, requires a bit more room to breathe and is best suited for a more traditional bookshelf or speaker stand placement, allowing its sound to fill the room effectively.

Ultimately, choosing between the Audioengine A2+ Wireless and the MartinLogan Motion 4i Bookshelf Speakers boils down to a matter of preference and intended use. The A2+ is a champion of convenience, offering great sound in a small package with the added benefits of wireless technology and a built-in DAC. It's a speaker that fits seamlessly into the lifestyle of a casual listener or a user with space constraints who still desires quality audio. In the other corner, the Motion 4i is a purist's delight, designed to deliver an audiophile-grade listening experience for those who have the means to fully exploit its capabilities within a high-fidelity sound system.

The choice between these two speaker systems is akin to choosing between a Swiss Army knife and a masterfully crafted, single-purpose tool. The Audioengine A2+ is the versatile, go-anywhere, do-anything option with ease of use at its core, while the MartinLogan Motion 4i is a focused instrument built for the discerning ear—a statement of sound precision and traditional hi-fi values. When it comes down to it, your decision will be guided by your unique listening preferences, space considerations, and the value you place on wireless technology versus purist audio fidelity.

Whether you find yourself swaying to the tune of the modern, multifaceted Audioengine A2+ or drawn to the classic, audiophile-grade craftsmanship of the MartinLogan Motion 4i, both speakers are testament to the incredible advancements in sound technology. They demonstrate that even within compact frames, there lies the potential for an expansive and enriching audio experience—one that can cater to the subtle nuances of a discerning palette or the everyday convenience sought by a contemporary listener.

Check Current Prices:

Audioengine A2+ Wireless Bluetooth Speakers
Audioengine A2+ Wireless Bluetooth Speakers
MartinLogan Motion 4i Bookshelf Speakers
MartinLogan Motion 4i 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.