The Beolab 150 was a power amplifier delivering 150 watts of mono sound and was made specially to both power and to sit beneath a Beovox Penta loudspeaker. It gave music a tremendous lift by the power which it could deliver. Normally, Beovox Penta speakers - as passive loudspeakers - were driven by a separate amplifier, but with either Beolab 150 or Beolab 200 the user had the possibility of powering the speakers individually through purchase of either a Beolab 150 or Beolab 200.
Each of these components were ‘penta’ shaped in that they had five sides. The Beolab 150 was positioned at the bottom of the Penta column loudspeaker and turned itself on automatically when it received an incoming signal. It also automatically turned itself off three minutes after receiving its last signal. Inbuilt circuits were combined which prevented distortion to the sound and damage to the speakers by softly rounding off signals which were too powerful. Another automatic circuit prevented damage to the drivers due to prolonged overloading.
Both BeoLab 150 and 200 were used as part of the BeoLab Penta active loudspeakers range. Each unit was connected by using a choice of either DIN sockets or two clip-sockets. There was also a line input phono socket with the whole unit being connected to the mains.
The Beolab 150, like the Beolab 200, was sold in pairs.
| Market | Type | Intro. year | Last sold |
| 1721 | 1986 | 12-88 | |
| AUS | 1725 | 1986 | 11-87 |
| GB-N | 1722 | 1986 | 12-88 |
| J | 1724 | 1986 | 12-88 |
| USA | 1723 | 1986 | 12-88 |
Details:
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