New for 1990 was the PB500 Pro Bass head (below). This replaced the PB400 head, and gave bassists an additional 100 watts to play with. As in 1990, the PB200 head was a stripped down head, without a graphic EQ, while the PB500 included the graphic EQ as on the retired PB400. Both Pro Bass models were available in rack-mountable versions, as well as mounted in an Ozite-covered cabinet.
The Pro Bass 115 (below, center) was unchanged for 1990, but it got a pair of new colleagues: the PB201 Combo (below, left) and the PB273 Bass Amp System (below, right). The PB201 Combo used the PB200 amp chassis, mounted into a combo with a PS15 woofer. It sold for $599. The PB273 used the PB500 head, with Carvin's new 973 speaker enclosure. The 973 tuned ported cabinet included a PS15C woofer with a PS6.5 driver and a 310 3-way crossover, which divided the bass guitar into 3 frequencies. Price on the PB273 was $899. The price on the PB115 was $649.
Also new for 1990 was the PB-15 Bass Preamp (below). This allowed bassists to use a power amp in their rig, with the PB-15 responsible for volume, tone shaping, etc. Price on the PB-15 was $349.