Teenage Engineering OB-4 – Portable Bluetooth Loudspeaker & Magic Radio

The OB-4 is a stylish and multifunctional speaker that blends FM radio, Bluetooth streaming, line-in, and a built-in 2-hour rolling tape loop. Whether you want ambient sounds, music, radio, or live loops, it offers creative flexibility and excellent sound wherever you are.

Key Features

• Stereo drivers + 2 tweeters in 2 × 38 W Class-D amps: Offers powerful sound output and dynamic range for its slim chassis
• Multiple input sources: Bluetooth classic & LE, 3.5 mm line-in, FM radio, and experimental disk mode (ambient, karma, metronome, noise, loop)
• 2-hour rolling tape loop: Continuously records what you play, enabling rewind, loop, and scrubbing with the tape dial
• Long battery life: Up to 72 hours when using FM at moderate volume; approximately 8 hours at high volume via Bluetooth
• Portable design with handle/stand: Lightweight frame, foldable handle with built-in antenna, and gel-dampened finish for durability and usability
• Bass reflex port & efficient drivers: Delivers solid bass down to 52 Hz and up to 25 kHz response with natural mid/high clarity

Customer Benefits

OB-4 gives you an all-in-one audio utility: bookshelf speaker, radio, streamer, loop station, and ambient machine. You can take it anywhere, control it with gestures and remote/app, loop radio or playlists, or tune into FM. It’s ideal for creative spaces, studios, outdoor listening, or just relaxing at home.

Quick Specs

• Power output: 2 × 38 W Class-D
• Frequency response: 52 Hz – 25 000 Hz
• Drivers: 2 woofers, 2 ferrofluid-cooled neodymium tweeters
• Active crossover frequency: 3.5 kHz
• Max SPL (1 m, stereo): 92 dB unsupported wideband; bass up to 104 dB SPL
• Inputs: 3.5 mm line-in, FM radio, Bluetooth classic (AAC), Bluetooth LE
• Battery life: ~72 hours in FM/low volume; ~8 hours using Bluetooth at high volume
• Dimensions (W × H × D): 23.25 × 28.4 × 5.75 cm
• Weight: 1.7 kg

What’s in the Box

• Teenage Engineering OB-4 unit
• Mains power cable
• Antenna

Use Cases / Ideal For

Great for those who want a single device that works as a portable radio, speaker, and creative audio tool. Ideal for studio spaces, work desks, kitchens, outdoor relaxing, and for anyone who enjoys loops, ambient soundscapes, or constantly playing content.

Compatibility

Compatible with any device using Bluetooth (classic & LE), supports line-level input via 3.5 mm jack. Works with FM radio. Remote control via Ortho Remote or the Orthoplay app. Universal built-in power supply (100-240 V) for global usage.

Pros & Cons

✅ Pros:

• Rich feature set in one unit: radio, loops, Bluetooth, line-in
• Very good battery life especially for FM and ambient listening
• Good loudness and clarity for its size with strong bass and highs
• Portable and creative design with useful control elements like the tape dial

⚠️ Cons:

• High volume Bluetooth playback drains battery quickly
• Slim design makes drivers more exposed—careful handling required
• No true balanced line-out for external amplification or recording setups

The Teenage Engineering OB-4 redefines what a wireless speaker can be by combining powerful audio, creative features, and portable design. If you want one device that does more than just play music, OB-4 is a standout.