Teenage Engineering Ob-4 Magic Radio Grey



OB–4 is a high-fidelity portable Bluetooth speaker with a 40-hour rechargeable battery. You can listen via line-in, Bluetooth, FM radio, or disc mode. OB-4 stores everything you want to play in a loop, so you can rewind the radio or remix everything, all within OB-4. It features a folding handle that doubles as a stand and an extended antenna.
*Please note this colour variation is in limited quantity

Available to backorder


Designed to let you play where and how you want. Bring it from home on your outdoor porch, picnic, or while on vacation. Play OB-4 on the go with a custom mesh carry bag, or why not incorporate it into your kitchen? The adjustable handle not only is a functional extra antenna, but also makes it easier to carry and can also be used as a stand for a more relaxed listening position.

Have you ever wished you could quickly rewind while listening to the radio?
Do you rush to the radio to hear the title of the song currently playing? OB–4 saves everything you hear to tape in an infinite loop*. Rewind, time-bend, loop, keep time, or zone out - all with one tap. Is it intentional or accidental? OB–4 lets you hear music like never before. This is just the beginning of all the magic that is in the OB-4.


The low latency line input makes OB–4 the ideal portable studio speaker. plug-in your instruments, a record player, any device that has an audio output. or use the fm signal to connect to OP–1 field. While you play, use OB–4 as part of the performance. play around with ambient mode, use the metronome to keep time, or loop your beats to create something new. live remix and experiment in the moment.


  • bluetooth, FM–signal, line-in and disk mode
  • 72 hrs radio listening on a single charge or 40 hours of listening via bluetooth
  • uv resistant paint
  • compatible with ortho remote and orthoplay app


Speaker Principle
Flow optimized bass reflex duct and semi unified chamber.

Frequency Range
52 – 25000 Hz

Amorphous polymer glass fibre reinforced pc and milled aluminium.

Design Features
Fine pitch tweeter grille, gel dampened handle, custom direct drive volume knob and tape dial.

Max SPL @ 1 m stereo configuration
92 dB unsupported wideband

Bass capability @ 1 m
104 dB SPL supported

Active crossover frequency
3.5 kHz

stereo 2 + 2

high efficiency ferrofluid cooled neodymium driver.

long throw high power capacity neodymium driver.

2 x 38 W
ultra high efficiency class D

Bluetooth® classic (AAC)
Bluetooth® 5 LE
FM radio

3.5 mm stereo in
(2.8 Vpp for 0 dBFS)

Battery life
normal volume FM: 72 hours
bluetooth high volume: 8 hours

General power requirements
AC 100-240 V 50/60 Hz
universal built-in power supply

Included accessories:
mains power cable

Product name
OB–4 (ortho book 4)

Country of origin:
czech republic

Product dimensions
232.5 x 284 x 57.5 mm

Product weight
1.7 kg

Additional information

Weight 2 kg
Dimensions 25 × 10 × 35 cm

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