One of my professors told me that its due to power suplly caps charge/discharge transients and that might just be the reason why valve amps dont have that pop. Valve amps have a series resistor / choke in their power supllies since valve amps draw small currents (500-1000mA). Problem is, with a solidstate amp (it draws like 2amps+) any significant resistance that I'll be puting in series to charge the caps slower will reduce some serious volts I'll need to ask around and come up with a solution.