I bought a Visonik v2908 amp for 20. The right channel has blown power fets and blown output transistors. Can I substitute stp50n06 for the irfz44n in the power supply. I plan on replacing all the power fets, at least on the right channel. If stp50n06 is a suitable replacement for irfz44n, should I also replace the left channel power fets? Would I notice any difference between the 2 channels if I don't? Thanks