Here is a Six Channel amplifier I built for a customer from Sydney.
It uses the larger HPA-nxV203ps 3 channel modules which have their own on board power supplies, featuring fully bridge rectifiers for each supply rail and up to 30,000uf per supply rail.
The power transforrmer is an 800VA Core with 4 x 35VAC secondary windings.
For AC power control it has the HPA-Power One mains controller and HPA-Limiter One mains current limiter.
Power output is a conservative 100 watts per channel.