mumra Posted March 16, 2011 Share Posted March 16, 2011 Hallo to all. Sorry for my English. I have an AMPEG SVT 4 PRO bass amp.I bought it from USA with 110V.I am from Greece.Here we have 220V. Now i use the amp with an external transformer 110 to 220V.The question is if anyone have the same problem and what he do for this. I would like to know if I could do something inside the amp. I contact with ampeg and they send me the following answer : [color="#FF0000"] Hi, Thanks for writing. This particular amp requires more than just a fuse change, but will also require that the transformer be tapped, if that option is available. Most SLM (Saint Louis Music) amps after 2003 have a transformer that can be tapped. According to the serial number, the SVT4Pro was manufactured in August, 2005. However, if the transformer cannot be tapped, you would need to get an external step down/step up transformer, depending on the voltage of the amp and the voltage of where the amp will used. Just as a side note, taking a domestic unit out of the United States automatically voids the warranty because international trade agreements. If you would like to get schematics to see if the transformer can be tapped, please read, fill out, and reply to the information below: All the Best,[/color] I don't understand the "transformer ca be tapped". A guy in a local service center told to me that he can change some cables and the everything it's ok. I am afraid if this its a problem from the amp. I hope you understand. Thanks Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted March 16, 2011 Share Posted March 16, 2011 (edited) [quote name='mumra' post='1164349' date='Mar 16 2011, 01:05 PM']Hallo to all. I don't understand the "transformer ca be tapped". A guy in a local service center told to me that he can change some cables and the everything it's ok. I am afraid if this its a problem from the amp. I hope you understand. Thanks[/quote] I'm no expert however transformers can have different connections to the windings therefore allowing for different voltages to be selected. I've only seen output voltage tappings rather than input voltage tappings. Not being an expert in this area i think best to take more advice from BC's who have expert knowledge on amplifier specifics. Dave Edited March 16, 2011 by dmccombe7 Quote Link to comment Share on other sites More sharing options...
icastle Posted March 16, 2011 Share Posted March 16, 2011 Hi mumra, What Ampeg are saying is that the transformer has two pairs of connections. One pair works for 110V, the other pair for 220V. You just need to change a couple of wires round in the amp and fit a different fuse. Quote Link to comment Share on other sites More sharing options...
mumra Posted March 17, 2011 Author Share Posted March 17, 2011 Thanks a lot for your answers. I will change the cables. I hope not have problem. Maybe I go the amp to the authorized ealer in Greece. Quote Link to comment Share on other sites More sharing options...
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