The Magic Radio OB-4: Where Sound Meets Soul, and Technology Becomes Poetry

In an age saturated with disposable electronics and algorithmically curated audio experiences, a rare device emerges—not merely to play sound, but to redefine how we listen, create, and connect with music. Meet the Magic Radio OB-4, a portable loudspeaker that transcends conventional boundaries, merging high-fidelity acoustics, intuitive interaction, and artistic expression into a single, elegantly engineered object. This is not just a speaker; it is a sonic companion, a studio monitor, a performance instrument, and a philosophical statement—all housed in a form that feels both timeless and radically modern.

A Philosophy Forged in Precision and Passion

At its core, the OB-4 embodies a singular belief: sound should be felt as deeply as it is heard. Designed by engineers who are also musicians, composers, and sound artists, the OB-4 rejects the notion that portability must compromise integrity. Every component—from the dual 3.5-inch full-range drivers to the custom-designed acoustic chamber—has been meticulously tuned to deliver what the designers call “natural sound”: a balanced, uncolored frequency response that reveals the true character of any recording, whether it’s a vinyl crackle, a whispered vocal, or the thunderous resonance of a bassline.

The secret lies in its four-driver configuration and proprietary acoustic engineering. Unlike typical mono or stereo portable speakers that rely on digital equalization to simulate depth, the OB-4 uses physical architecture—symmetrical driver placement, optimized porting, and precision-damped enclosures—to generate genuine spatial imaging and dynamic range. The result? A listening experience that remains coherent even at high volumes, with minimal distortion and exceptional clarity across the entire spectrum. You don’t just hear the music—you inhabit it.

Beyond Playback: The OB-4 as a Creative Catalyst

What truly sets the OB-4 apart is its radical reimagining of the speaker’s role. It is not a passive output device; it is an active participant in the creative process. Through its innovative motorized user interface, the OB-4 transforms tactile interaction into sonic expression. Two large, weighted rotary knobs—crafted from aerospace-grade aluminum with haptic feedback—allow you to adjust volume and tone with the precision of a studio engineer, while simultaneously triggering expressive functions like ambient mode, noise generation, or loop playback.

Ambient Mode: Sculpting Space with Sound

Imagine stepping into a room where silence isn’t empty—but charged. The OB-4’s Ambient Mode lets you convert any audio source into an immersive sonic environment. Using real-time spectral analysis, it extracts the harmonic essence of your music and re-synthesizes it into evolving, non-repetitive textures. A piano melody becomes a gentle wash of resonant tones; a drum loop transforms into a pulsating field of subharmonics. This isn’t background noise—it’s acoustic architecture, designed to enhance focus, relaxation, or introspection without demanding attention.

Metronome & Noise Generator: Tools for Discipline and Discovery

For creators, the OB-4 doubles as a precision instrument. Its built-in Metronome features 800 programmable rhythmic patterns, from classic time signatures to polyrhythmic grids and irregular pulses—ideal for composers, producers, and improvisers seeking rhythmic grounding or inspiration. Meanwhile, the Noise Generator offers six distinct sonic palettes: white, pink, brown, violet, blue, and grey noise—each calibrated for specific psychoacoustic effects. Use them for masking distractions, aiding concentration, or as raw material for sound design experiments. These aren’t gimmicks; they’re professional-grade tools embedded within a portable chassis.

Loop Function: Instant Composition Studio

The OB-4’s Loop feature turns spontaneous ideas into structured compositions in seconds. Record up to 2 minutes of audio directly through the built-in microphone or line-in, then manipulate it in real time: reverse, pitch-shift, layer, or trigger overdubs. With seamless integration of orthoplay (a proprietary spatial audio engine), loops can be panned, modulated, and blended with external sources—making the OB-4 a self-contained performance rig for live looping, beat-making, or experimental sound art.

Wireless Freedom, Wired Integrity

Connectivity is where many portable speakers falter—compromising fidelity for convenience. The OB-4 refuses that trade-off. Its wireless subsystem leverages Bluetooth 5.3 with aptX Adaptive and LDAC support, ensuring near-lossless transmission even over distance. But more importantly, it integrates seamlessly with the orthoplay wireless protocol, a low-latency, high-bandwidth system developed specifically for synchronized multi-speaker setups and studio monitoring applications.

For purists, the OB-4 includes a premium 3.5mm analog input and optical TOSLINK, allowing direct connection to DACs, mixers, or vintage gear. And for those who demand absolute control, the FM radio receiver isn’t a nostalgic afterthought—it’s a fully tunable, high-sensitivity unit with RDS support, capable of capturing distant stations with crystal clarity, thanks to its telescopic antenna and adaptive filtering.

Form Follows Feeling: Design as Emotional Resonance

Aesthetically, the OB-4 is a masterclass in restrained elegance. Its compact footprint (232.5 × 284 × 57.5 mm) belies its acoustic ambition, while its minimalist front panel—featuring only two drivers, two knobs, and a subtle LED ring—invites focus rather than distraction. The enclosure is crafted from CNC-machined aluminum alloy, finished with a matte anodized coating that resists fingerprints and scratches, yet feels warm to the touch.

But beauty here is functional. The symmetrical driver layout ensures balanced stereo imaging regardless of orientation, while the integrated carrying handle—engineered for ergonomic grip and structural reinforcement—makes the OB-4 truly portable without sacrificing rigidity. It’s a device that looks equally at home on a studio desk, a café table, or a forest clearing—because its design philosophy respects context, not convention.

Seven Colors, Infinite Personalities

The OB-4 is available in seven thoughtfully curated finishes, each evoking a distinct emotional tone:

• Matte Black: Timeless sophistication
• Aurora Gray: Modern neutrality
• Red: Bold energy and creative urgency
• Burnt Orange: Warmth, depth, and artistic fire
• Gray: Understated professionalism
• Ochre: Earthy authenticity
• Navy Blue: Calm authority

A newly introduced White variant adds luminous contrast—ideal for minimalist interiors or creative studios where light and reflection become part of the aesthetic experience.

Technical Excellence, Without Compromise

Under the hood, the OB-4 is a marvel of integrated engineering:

• Dual 3.5-inch full-range drivers with neodymium magnets and silk-dome tweeters
• 2×38W Class-D amplification with dynamic power management
• High-capacity lithium-polymer battery delivering up to 72 hours of continuous playback at moderate volume
• FM radio with 72-hour preset storage and automatic station scanning
• USB-C PD charging with 104dB SPL peak output
• HARM encoding compatibility for lossless audio streaming
• IP54-rated dust and splash resistance

Every specification serves a purpose—not to impress on paper, but to ensure reliability, longevity, and consistent performance under real-world conditions. The OB-4 doesn’t shout its specs; it proves them through sustained excellence.

The Magic Lies in the Listening

Ultimately, the OB-4’s greatest innovation is not technological—it is experiential. It invites you to slow down, to listen actively, to engage with sound as a living entity. Whether you’re a producer sketching ideas on a train, a designer seeking sonic inspiration in a quiet corner, or a listener rediscovering the emotional weight of a familiar album, the OB-4 responds with intelligence, empathy, and grace.

It bridges the gap between consumer convenience and professional capability—not by adding complexity, but by removing friction. Its interface is intuitive because it mirrors natural human gestures: turning, twisting, pressing. Its sound is honest because it honors the source material rather than imposing an artificial signature.

In a world increasingly defined by ephemeral digital interactions, the OB-4 offers something rare: presence. It reminds us that great audio equipment shouldn’t disappear into the background—it should deepen our connection to the moment, to the music, and to ourselves.

This is more than a speaker. It is a manifesto in aluminum and circuitry—a declaration that technology, when guided by artistry and respect for the human ear, can elevate everyday life into something extraordinary. The Magic Radio OB-4 doesn’t just play sound. It makes space for wonder.