Diva Swan speakers - they were one of the early internet speaker companies. They had a deal if you bought 2 floorstanding and 2 bookshelf speakers they threw in the $500 center channel for free. I've upgraded receivers with newer surround processing over the years, but the the core 5.1 holds up great for 20+ years now. https://hometheaterhifi.com/volume_8_2/diva-swans-41-speakers-5-2001.html