Condensers in power supply

Just a quick question, I want to assemble a five channel power amp using five mono mosfet amplifiers, each has a voltage range 15 to 70v, 150 watts in to 8 ohms. I am also using 3 dual rectifier boards 100v 120a. My question is can I parallel 3 transformers to power each rectifier board or use one transformer and connect the rectifier boards from dc out to ac in

First large project, might be too large.