Welcome to Carlssonupgrade
Probably the best upgrade kits for the legendary Carlsson speakers!
The upgrade kits are available for the OA-51 and OA-52 only.
OA- 51 upgrade kit, consist of drivers and crossover
OA- 52 upgrade kit, consist of drivers and crossover
Beside the kits, several new tweeks has been developed too.
OA- 52 new stands
OA- 52 new basextension
a. Wooden feets
b. Stainless steel feets
OA- 52 new absorption panels