I currently using a pair or JBL L40's these are similar to the L26.
The main difference between the two models was the lower cross over point and the dome tweeter on the L40.

Both the L26 or the L40 would probably need some work on them unless you can find a restored pair

How do they sound good question?

There major strength is speed and dynamics, with instruments and vocals have a realistic presentation.
They are one of the only speakers I've heard that make brass instruments sound like they are being play in front of you.

Stereo image is not as sharp as a tall skinny speaker but the music is presented with a good front to back depth.

Sharif.

PS. I hope to set-up a bake-off this month for up to seven people if anybody is interested?