Mysterious stuffs, folks...
I owned Tandberg's gears for most of my life: TL 5020, Studio Monitor, Tandberg 114/116-8 coaxial speakers... and TD20A, 3500 and 9200 XD reel to reels.
I recently bought for cheap a pair of Hi-Fi System 11 speakers... a truly unassuming, humble shoes-box sized speaker which I connected to my trusty Partridge 300B mono blocks, just out of curiosity.
The sound I enjoyed so much most of the day is so right... hard to believe: or my 300B amps are so incredibly good to make virtually everything to sound heavenly or... these speakers are amazing...
... not sure which of the above.
Hi-Fi is such a funny hobby: a cheap, unknown speaker is able to give more music of many hideously expensive piece of gear I'm aware of!
Funny... so funny I'm almost worried;-)