Carlsson OA-51.2


The Carlsson OA-51.2 was the upgraded version of OA-51. This model was not sold a speaker pair, only as an upgrade kit to owners of OA-51. The upgrade consisted of new improved woofers, tweeters and crossovers.
The woofer was the Scan-Speak 18W/8545 replacing the older 18W/8542. The 8545 has lower distortion and age resistant surrounds etc. The tweeter is a Vifa aluminium dome tweeter. The crossover is a 6/12 dB with high quality components
After upgrading the speakers you still have a speaker with almost the same looks but with better performance. The elements are more modern and up to date giving you a speaker according to the same principles but with the benefit of the more recent speaker developments.

OA-51.2 is still so new so it’s not likely to be in need of a restoration yet.
When that time comes it is however easy to restore according to “restoration and upgrading”.

This is deemed to be difficult to do effectively with a good result so there is no fixed price for this. Re-veneering is however not impossible, all questions regarding this should be addressed to:
Carlssonfabriken i Skillingaryd / Larsen HiFi
Tel + 46 370-70 900
([email protected])


Standard upgrade to OA.51.3 from 51.2
This contains new tweeters and crossovers.


New grill
The original foam front is most likely ruined by now. Therefore a new protective wire grill has been developed for the speaker instead.

New damping material for the absorbent panels.
The panels have also by now most likely deteriorated. New damping material is available.
All kits etc are available from:
John Larsen at Carlssonfabriken i Skillingaryd.
Phone: + 46 370 70 900
([email protected])


Principle: 2-way omni directional bass reflex tuned to 38Hz, with absorbent panels.
Impedance: ont-weight: normal;”>8 Ohms
87 dB / W / M (OA-51)
Mid/bass: 7”, Scan Speak 18W/8545
Tweeter: 25 mm aluminium dome tweeter, Vifa D25AG-35-06
Weight: 14.4 kg
Measures: 43 x 30 x 25 cm W x H x D. W including absorbent panel 72 cm
Inner volume: 16 litres
Finish: Walnut, rosewood, black ash or white lacquer, or choice (OA-51)
Positioning: Close to a wall / Wall hanging
Cross over freq: 2500 Hz (OA-51)
Frequency range: 32-20.000 Hz (OA-51)
Frequency response: 40-17.000 Hz ± 2 dB (OA-51)

New speakers:
 Was never available.
Upgrade kits: OA-51.2 to 51.3: 2,500 SEK per pair
New designed textile/metal grill: 1000 SEK per pair
Damping material for absorbent panels: 50 SEK per piece
Second hand:
OA-51.2: Ranging from 1,500 to 6,000 SEK depending on finish etc.

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