Teenage Engineering OB-4 Black portable high-fidelity Bluetooth loudspeaker
Teenage Engineering OB-4 Black Portable High-Fidelity Bluetooth Loudspeaker | Ultra-thin ‘orthobook’ design with powerful, room-filling sound. OB-4 is a portable high-fidelity loudspeaker combining ultra-slim form with a surprisingly wide and dynamic soundstage. Built for everyday use and long listening sessions, it offers multiple inputs, long battery life and a distinctive rotating handle that doubles as a stand.
Ultra-thin. Ultra-powerful.
OB-4 is an ultra-thin ‘orthobook’ Bluetooth® loudspeaker with a sound that feels much larger than its compact form. Designed by Teenage Engineering for high-performance portable audio, it delivers deep low end, detailed mids and clear, open highs for a natural listening experience that fills the room.
Four speakers. Full dynamics.
Inside OB-4 you’ll find four tailor-engineered speaker elements: two long-throw woofers and two neodymium tweeters. A flow-optimised bass reflex duct produces deep, natural bass, while the stereo image stays wide and spacious despite the ultra-slim enclosure.
Listen your way.
Play anything through OB-4: Bluetooth, FM radio, stereo line-in or Disk Mode. With support for Bluetooth Classic and Bluetooth 5 LE, it’s ready for high-quality wireless audio streaming and remote volume control through the ORTHO PLAY app.
The iconic rotating handle.
The signature rotating handle is more than a design detail: it houses an extended FM antenna, works as a carry handle and doubles as a stand for angled listening. Portable, functional and instantly recognisable.
72 hours of FM. 40 hours of Bluetooth.
Powered by a high-capacity Li-ion battery, OB-4 delivers up to 72 hours of continuous FM listening or around 40 hours via Bluetooth on a single charge — built for real-world, long-duration use.
A new kind of interface.
The minimal, mechanised interface hides deeper interaction beneath its clean surface. A digital motion-controlled volume knob and tape-style reel let you grab, spin, rewind and interact with sound in intuitive ways.
Disk Mode: bend time.
Disk Mode lets you rewind, loop and time-bend the audio around you. Explore ambient, karma, metronome, noise and loop functions on OB-4 — expanded further through the ORTHO PLAY app.
Your portable studio monitor.
The low-latency line input makes OB-4 an excellent portable studio monitor. Connect instruments, mixers, turntables or any device with an audio output and bring accurate, high-fidelity monitoring anywhere.
Ultimate portable loudspeaker.
OB-4 is the ultimate portable loudspeaker. Made to be played wherever you need, however you want — outside on the porch, at a picnic or taken from your home to your holiday. Use the custom mesh carry bag to play OB-4 on the move and enjoy consistent, high-quality sound wherever life takes you.
Or give it a home in your kitchen. The adjustable rotating handle not only houses an extra FM antenna, but also makes it effortless to carry. It doubles as a stand for a more relaxed listening position, turning OB-4 into a flexible sound companion for any environment.
Compact. Capable. Anywhere.
Small enough to take anywhere, powerful enough to fill a room. With its compact size, built-in handle and extended battery life, OB-4 adapts to your lifestyle — from the living room to the studio and beyond.
Technical Specifications
- Speaker principle: flow optimized bass reflex duct and semi unified chamber
- Frequency range: 52 – 25,000 Hz
- Active crossover frequency: 3.5 kHz
- Configuration: stereo 2 + 2
- Tweeter: high efficiency ferrofluid cooled neodymium driver
- Woofer: long throw high power capacity neodymium driver
- Amplifier: 2 × 38 W ultra high efficiency class D
- Wireless: Bluetooth® classic (AAC), Bluetooth® 5 LE, FM radio
- Inputs: 3.5 mm stereo in (2.8 Vpp for 0 dBFS)
- Max SPL @ 1 m stereo configuration: 92 dB unsupported wideband
- Bass capability @ 1 m: 104 dB SPL supported
- Battery life: FM (normal volume) 72 hours, Bluetooth (high volume) 8 hours
- General power requirements: AC 100–240 V, 50/60 Hz, universal built-in power supply
- Dimensions: 232.5 × 284 × 57.5 mm
- Weight: 1.7 kg
- Materials: amorphous polymer glass fiber reinforced PC and milled aluminum
- Design features: fine pitch tweeter grille, gel dampened handle, custom direct drive volume knob and tape dial
- Colors: white, red, matte black, navy, ochre, gray, orange
- Included accessories: mains power cable, antenna
- Compatible add-ons: ortho remote, shoulder strap
- Product name: OB–4 (ortho book 4)
- HARM code: 8518220000
- Country of origin: Czech Republic
About Teenage Engineering
Based in Stockholm, Teenage Engineering is known for its unique blend of innovative audio technology and distinctive industrial design. From portable synthesizers to high-end speakers, every product combines creativity, engineering excellence and thoughtful aesthetics.
OB-4 represents this philosophy at its best — a precise yet playful high-fidelity loudspeaker built for real use, long listening sessions and modern portability.
@ pen.store.gr
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