Teenage Engineering OB-4 Portable Speaker

A Portable Speaker with a Unique Positioning

With the OB-4, Teenage Engineering does not just offer a simple portable speaker. The model adopts a much more creative approach to daily listening by blending FM radio, wireless streaming, and direct interaction with sound. Its instantly recognizable design, iconic handle, and refined finish make it a standout product in the high-end Bluetooth speaker market.
Within the manufacturer's range, the OB-4 holds an original place: that of a design audio object, conceived as much for listening pleasure as for experimentation. It carries forward the innovative spirit of the Swedish brand, known for its electronic instruments and devices with strong identity, while applying it here to a more domestic, mobile, and universal use.

For Demanding, Creative, and Mobile Listeners

The OB-4 is aimed at those who want more than just a backup speaker. It is perfectly suited for the discerning user seeking quality music playback in a living room, kitchen, workshop, terrace, or shared living space. Its compact format and handle facilitate movement, making it an ideal solution for mobile listening without sacrificing sound presence.
It will also appeal to creative profiles, collectors of unique audio objects, and radio enthusiasts who want to revisit a passage heard a few minutes earlier without frustration. For use at home, on the go, or in semi-public settings, the OB-4 offers a more lively and intuitive experience than a typical connected speaker.

Interactive Listening, Natural Bass, and a True Sonic Personality

The most striking feature of the OB-4 remains its "magic tape" system: a rolling 2-hour recording that continuously memorizes what you listen to. Practically, you can rewind a radio show or track, adjust playback speed, and create instant loops. It's a fresh, playful, and very modern way to rediscover radio and music.
Acoustically, the speaker relies on four custom-designed drivers arranged in a 2 + 2 configuration. The goal is not just volume but a wide stereo image and more natural reproduction. Rather than artificially boosting the bass, Teenage Engineering focuses on an optimized bass reflex port and sophisticated internal design to produce deep, pleasant, and less fatiguing bass.
The user experience also strongly contributes to the OB-4's charm. The mechanically interactive controls invite you to manipulate sound with your fingers, notably via the direct-drive volume knob and dedicated wheel. On the connectivity side, the speaker supports Bluetooth audio, Bluetooth Low Energy, FM radio, and a 3.5 mm stereo input, allowing it to easily integrate into various uses, from mobile streaming to wired listening.
Finally, its battery life is a real daily asset. Depending on usage, it can offer up to 72 hours of FM radio listening, about 40 hours on average per charge, or around 8 hours at maximum volume. This level of endurance, combined with its integrated universal power supply, further enhances its appeal as a premium portable speaker, equally at ease indoors and outdoors.

Technical specifications

Battery	Yes	Tweeter	Yes
Battery life	8 HOUR	Cut-off frequency	3,5 kHz
Category	multimedia	SPL max	92 dB
Type	active speaker	Inputs	stereo minijack
Number of channels	2 channels	Color	Black
Amplification	Active amplified	Power output	76 W
Bluetooth	Yes	Quantity	1
Speaker diameter	4"	Weight	1.7 kg
Number of speakers	2	Dimensions (mm)	232.5 x 284 x 57.5

Acoustic principle	optimized flow bass reflex port, semi-unified chamber	Audio input	3.5 mm stereo mini-jack, 2.8 Vpp for 0 dBFS
Configuration	stereo, dual 2-way	Maximum battery life	up to 72 hours FM listening
Frequency response	52 Hz - 25,000 Hz	Average battery life	up to 40 hours per charge
Active crossover frequency	3.5 kHz	Battery life at maximum volume	about 8 hours
Woofer	long-excursion neodymium driver with high power capacity	Power supply	integrated universal power adapter
Maximum SPL at 1 m	92 dB in unsupported full range	Electrical requirements	AC 100-240 V, 50-60 Hz
Bass capacity at 1 m	104 dB SPL supported	Materials	amorphous polymer, fiberglass-reinforced PC, machined aluminum
Playback functions	rewind, time-stretch, loop	Design elements	fine-pitch tweeter grille, gel-damped handle, direct-drive volume knob
Wireless	Bluetooth Audio A2DP / Stereo AAC	Dimensions	232.5 x 284 x 57.5 mm
Radio	FM	Country of origin	Czech Republic