Picked up a pair of Linn Index bookshelf speakers at a local thrift shop for 39 bucks. Needed a pair of speakers to go with my vintage Optonica Amp. They look to
Speakers Optonica CP 5000 H For Sale - UK Audio Mart
OPTONICA CP 5000H - YouTube
Optonica CP-2121 speakers | Audiokarma Home Audio Stereo Discussion Forums
OPTONICA by SHARP In very early 80's, //9100 series | Hifi audio, Hifi, Audio