The parts for the subs I'm going to build for a friend and roommate shipped yesterday. The amp for both is this one: http://www.partsexpress.com/pe/showd...=9387&CATID=43 I intend to change the boost to 1dB at 25hz with the corner freqeuncy at 17hz. The roommate has friends where he works who are experienced at soldering to change out the resistors. So my question is since I know almost nothing about resistors is there anything I should know before I go buy some 1/8 or 1/4W 47K and 180K ohm resistors at Radio Shack? Pat mentioned in another thread I should stay away from polarized caps and get non-polarized ones. Can/should I get them at Radio Shack? Does it matter if they are 1/2W? Is there a certain brand I should be looking for? Is there a certain material they should be made of?