lol well thats the problem.. I have no clue where to get a 40 volt center tapped transformer, let alone a 40 volt single supply tranny

. I would like to try useing the one I have ( if nothing for the sake of learning how to do it) plus being 16, I have a limited budget.. I mow my neighbors lawn once a week and get 20 bucks lol. I need to save up money for my 63 falcon too, it needs a tank and brakes before I can drive it to get a job. But oh well, I guess if theres no way to use this transformer and step up the voltage I'm gonna haveta find a tranny online. Hey Ive got a question too. The transformer poweres my creative t5500 inspire 5.1 and its rated at 75 watts RMS ( boo hoo... thats at 10% thd too so its not exactly RMS you stupid creative marketing dept!) lol sry, anyways, i calculated that the 13.5 volt 5 amp transformer is able to produce 67.5 watts of power, so not too far off from their 'RMS' ( really peak

) rating. Now the chips inside are TDA8947J's , 2 of them ,each run from 9-26 volts, nominal voltage is 18 , which is where it puts out 8.5 watts per single ended channel and 18 watts in the btl. My sats are rated at 8 watts rms, center 20 wrms, sub 22 wrms. Probably all at the same 10 % THD too. Its 22 volt ratings are a little nicer, 14 watts SE and 29 watts BTL, which would be closer to the ratings if they really are real RMS ratings. My question is that the chip is designed to run on a single supply, up to 26 volts, DC, not ac. I know the amp has a rectifier bridge on it ( yes, I like to take my stuff apart and see whats really in it

) so it converts it to dc. My question is, is there something on the circuit that ups that ac voltage to a slightly higher dc voltage with lower current? Ie, 18 volts or 22 volts.

Theoreticly, If you multiply the voltage by a variable, then devide the amps by the variable you get your voltage/amps. if you use 1.3 you get 17.55 volts @ 3.8 amps, and by 1.4 you get 18.9 v @ 3.5 amps, and if you multiply it by 1.5 you get 20.2 v @ 3.3 @ and by 1.6 you get 22.95 v @ 3.1 amps. and so on and so on. I noticed that there are a heck of a lot more chips on the board than your typical cheap computer speakers, most of them 8 pin dip's. I havent been able to identify some of them, but I believe some are voltage regulators, opamps , and dc volume controlls, as well as crossovers. I kinda got carried away here, I guess my question is do they use some kind of inverter or something to up the voltage and drop the amps while converting it to dc? or will 13.5 volts @ 5 amps converted to dc really power the chips to their rated output? can you do that with a chip, lesser voltage @ higher amperage? ( Im not sure on that one, I dont think its true but I'm just asking

)