Members bond Posted December 13, 2006 Members Share Posted December 13, 2006 I live in aus, if i buy one from the US and need a stepdown transformer just for the preamp, I'd prefer to save on the weight by using an appropriate transformer, eg buying a 500w tranny, when it only pulls 50w ... cheers Link to comment Share on other sites More sharing options...
Members nitehawk Posted December 13, 2006 Members Share Posted December 13, 2006 Not sure about the Mesa Quad, but preamps in general don't suck too much power. Just for reference, the manual of my ADA MP-1 says it draws 18W, and my Engl E530 says 16W Max. However, a 200W 240V step down will only handle 100W at 120V. There's possibly some physics theory behind it but I just woke up and my brain is still on AUX power. However I have a 200W step down for my ADA MP-1, and it says "For use with appliances up to 100W" PS. I found Triaxis specs and it says 30W. Link to comment Share on other sites More sharing options...
Members nitehawk Posted December 13, 2006 Members Share Posted December 13, 2006 I just saw the rear end of a Mesa Quad on ebay and there's written "120V, 60Hz, 1A". If my physics is correct, P=IV = 120W. Wow.. that's a hell of a lot of juice for a preamp! Guess you're gonna need the bigger tranny! Link to comment Share on other sites More sharing options...
Members bond Posted December 14, 2006 Author Members Share Posted December 14, 2006 i think thats the fuse rating, you (try to atleast) over-engineer in the electronics world for a worst case scenario.... Link to comment Share on other sites More sharing options...
Members Karloff Posted December 14, 2006 Members Share Posted December 14, 2006 500w sdt is enough... Link to comment Share on other sites More sharing options...
Members bond Posted December 14, 2006 Author Members Share Posted December 14, 2006 i was using that as an example of a bad match ... i'll probably use an 80w small package, that weighs in under .5kgthe easier to move my 12 space around the better .... Link to comment Share on other sites More sharing options...
Members Karloff Posted December 14, 2006 Members Share Posted December 14, 2006 80w sdt is not enough.you need bigger..the quad wattage is 150w. Link to comment Share on other sites More sharing options...
Members nitehawk Posted December 14, 2006 Members Share Posted December 14, 2006 Originally posted by Karloff 80w sdt is not enough.you need bigger..the quad wattage is 150w. I wonder where all that juice is utilised. If ADA got away with 18W on their killer MP-1, and the Mesa Triaxis gets away with 30W when it has 5 tubes, I wonder what is in there that needs 150W Link to comment Share on other sites More sharing options...
Members boogieman_dan Posted December 15, 2006 Members Share Posted December 15, 2006 Originally posted by nitehawk I wonder where all that juice is utilised. If ADA got away with 18W on their killer MP-1, and the Mesa Triaxis gets away with 30W when it has 5 tubes, I wonder what is in there that needs 150W Well, lets see...the fact that all 8 12AX7's are being fed around 450v DC (+/-) to their plates could have something to do with that. Link to comment Share on other sites More sharing options...
Members nitehawk Posted December 15, 2006 Members Share Posted December 15, 2006 Originally posted by boogieman_dan Well, lets see...the fact that all 8 12AX7's are being fed around 450v DC (+/-) to their plates could have something to do with that. 8 tubes... ahh ok that explains things Triaxis = 5 tubes = 30W.... 8 tubes = 48W.... *sigh* Link to comment Share on other sites More sharing options...
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