Speakerlab SJ speakers, an interesting find as of late is the smallest of the Speakerlab speakers called the SJ. This is a 4.5 inch full range speaker in a small ported box with a super tweeter added for the highs. They claim these caould be used for a car, although they seem a bit big for that.
They do have a big sound and surprising bass response, along with decent highs from the paper cone.
The original brochure can be found in the Speakerlab site from 1980.
https://speakerlab.net/catalog_13_1980.html#
I did do a screen shot of the catalogue from their site.
Super cool little pair of speakers with a big sound, I am glad I came across these little gems.
