"To ensure an adequate reserve of power I chose two
650 VA toroidal transformers, each rectified by 35A high
surge current bridge rectifier. The PSU60 kit from Ampslab
provides the fuses and connections for the power rails and
60 000uF of capacitance. I added two additional 22 000uF
high current capacitors due to the large number of amplifier
modules. With all this capacitance I installed the Soft
start turn on delay kit from Ampslab so the amp does not
trip any circuit breakers or fuses. This delay also helps
stop the house lights dimming and "thump" noise
in speakers at amplifier turn on. The soft start turn on
delay is powered via a small12V toroidal transformer mounted
to the base panel.
next thing I did was power up the amplifier to test it.
I was nervous at first but after I applied power and no
smoke/fire/sparks were seen I was happy!! I applied bias
to all seven modules per the Ampslab instruction, the bias
level is really
to set accurately so I was very happy at this point.
all the time and effort I put
into building this amplifier I could not wait to listen
to it so I connected it to a CD/DVD player to listen
straight away. After checking each channel operated correctly
by ear and then with a CRO I was very pleased with the results,
the sound is very clean and clear with no hiss or hum and
plenty of power in reserve.