Members Cliff Fiscal Posted April 7, 2009 Members Share Posted April 7, 2009 Link to comment Share on other sites More sharing options...
Members L. Ron Hoover Posted April 7, 2009 Members Share Posted April 7, 2009 That really depends on how the circuit is set up and on the voltage ratings of the components. I'd say most Opamp-based preamps could probably be converted to 18V without modification, but without knowing how the circuit is set up I couldn't say for sure. Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted April 7, 2009 Author Members Share Posted April 7, 2009 What happens if it can't handle it? Fry the circuit? Link to comment Share on other sites More sharing options...
Members L. Ron Hoover Posted April 7, 2009 Members Share Posted April 7, 2009 What happens if it can't handle it?Fry the circuit? If 18V exceeds the voltage rating of the chip or the capacitors, that's quite possible. For example, if they were using 10V rated capacitors and you put 18V on them, they would eventually fail. Maybe not right away, but at some point they'd fail. The other concern is if the circuit is using discrete transistors and the bias arrangement is set up around 9V operation. Putting 18V on there might not damage anything but it would make it work differently. Whether that affect would be good or bad ultimately depends on the particular circuit. As a designer, I like to build circuits that are tolerant of a wide variety of supply voltages. I'm sure that can't be said for every designer. Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted April 7, 2009 Author Members Share Posted April 7, 2009 How do I determine what I have? Link to comment Share on other sites More sharing options...
Members L. Ron Hoover Posted April 7, 2009 Members Share Posted April 7, 2009 How do I determine what I have? Your best bet is to contact the manufacturer and ask them. What kind of preamp is it? Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted April 7, 2009 Author Members Share Posted April 7, 2009 I didn't have one specifically in mind..... ...but the only active preamped bass I own is a Spector Legend with the Tonepump Jr. preamp. Link to comment Share on other sites More sharing options...
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