ricardo electric

i will not slag you off, you were right with these amps blowing up! the first time, the wiring was going the wring way and it frazzled the track on the board. the second time, a resistor (nearly 2 got taken out) went on fire, rendering the board as scrap (nearly!). the speaker that was coupled made a buzzing sound (had it on for no more than one second) and then tried to make a burning smell, i ended up with 25v ground running through it, no wonder it tried to go on fire. maybe i should have listened to you before applying power?!?! at least i've now learned to go to the shops and buy an approved amp!

thanks for that. it is a velleman kit, the info you gave me made some sense. i understand your point when you say that switching the power from the transformer to the amp may cause a 'pulse', the 4 leads are labelled in the booklet but i am not worried about colour coding at the minute. would you say that it is safe to run 2 velleman kits from a 300 va transformer? have you also got any good advice on how to connect 2 to the same transformer or will i more than likely have to search out another one? i look forward to your reply, the first one was pretty useful!

i have a slight problem in the way of : i have got a toroidal transformer coming through the post, which is around 300+ va. i have got 2 200w (400w total power at 4 ohms) amp kits rated at 120 va each (there are 4 leads off the transformer to connect to the 4 connectors on one amp kit) if i were to put a screw connector block on the 4 individual output leads, this should give me 2 sets of four leads with 120 va feed per amp (240 va total), i don't know if this is safe or not as i thought it might over power something or even cause backfeed?? ??? i would like to fit switches to operate the amps independently but that would then mean having to tap off the 2 25v inputs, leaving the grounds working/coupled, is this switching idea safe? ??? i would appreciate any responses i get from this! :)