...owned a pair of heathkit 101s for 30 years. great system. I added a pair of 077 jbl slot tweeters and a passive crossover at 8,000 ....

you could bi-amp these with an electronic crossover and two power amps but do not use the sub bass output on your receiver. These bi-amped systems are difficult to set up properly. I would say both power amps with gain controls are a minimum needed.


If your looking for more kick from the bottom end, add a dedictated sub woofer with a big plate amp. The JBL 18" drivers like the 2245 or 2240 are good for this purpose. The 18" drivers require a huge cabinet, however.