Amazing Audio Giant Turbo Quatro 300

This Amazing Audio Turbo Quatro is bought in april 2000 at a second-hand white goods store in Eindhoven Holland.
The seller told me that this apmlifier was comming from the
Technical University in Eindhoven where 200..300 man-hours had buid this in 3..4 years. It called: No quality but lots of herrie (hubbub) amplfier Only for max logo music ;)
I bought it immidiatly for I think 125...150 guilders. A cheap bargain!
In 2001 to 2003 I worked my first job after I left high school at Master Blaster Hilversum also familliar with Sound Projects
were I rebuild this amplifier in my spare time. The whole amplifier was stripped and module to module rebuilded.
So the power supply was a mess and totally redesigned. where also the main filter card was redesigned and bulid up.
Also the wiring was put in new and all the 4 amplfier modules where build up from scratch.
after that the sound was really HIFI for a PA amplfier. In 2003..2004 I build 2 x single 18 inch subwoofers
and 2 top's for this amplifier with speakers comming from an Master Blaster Grand Tour set. Till year 2010 I
Used this amplifier but after 2010 the mains voltage became from 220VAC more to 230VAC where I knew that the power
capacitors would reach far over their maximum voltage. So I never used it more until I now finnally had the time
to change these capacitors from 75VDC to 100VDC and almost doubled the capacitance. Now it is back in business!