Hi Kid; I remember the 5Gs. If I am correct, it is a two way 8 inch speaaker with a port. They did produce rather good sound. In 1974, I auditioned the 4g,5g,6g and I think the 7g three way 8 inch speaker system. At that time the store had a line of Pioneer and Marantz receivers. Forget about Pioneer receivers in 1974 for their sound quality; Pioneer did not get their great sound quality till later on. Their recievers at that time sounded like mush and could not push any of the Marantz line the day I autiioned the speakers. Such was not the case with the Marantz receivers. Of the 4 models, I choose the 6G two way ported 10 inch which IMHO delived the most bang for the buck at that time which ran $174 for the pair. My second choice would have been the 5Gs.