i am starting to work on building a power supply for an amp i built from a kit. i have ideas on the methods i will use, mainly a large toroidal transformer and 2 diode rectifier circuits (some how put 180 out of phase and then added back together to cancel out noise in the end dc voltage. i would like to get 12 to 13 Vdc. starting with standard 120-125 Vac 60hz. currently planning on starting with this design and modifying it. any input would be great.

http://www.adireaudio.com/Files/UcDPowerSupply.pdf