chris_b Posted May 16, 2017 Share Posted May 16, 2017 Pre amps are switched on by inserting the jack plug. That's how they work. I'd need a confirmation from the manufacturer before I'd believe anyone who says theirs does not do this. Quote Link to comment Share on other sites More sharing options...
mcnach Posted May 16, 2017 Share Posted May 16, 2017 [quote name='RhysP' timestamp='1494970661' post='3300149'] My Jaydee Supernatural had a mini toggle switch between the volume & tone controls for the active circuit. [/quote] That's generally a bypass switch and it normally does not disconnect the preamp, it remains powered, but the signal bypasses it. Quote Link to comment Share on other sites More sharing options...
Grangur Posted May 17, 2017 Share Posted May 17, 2017 Presumably you could fit a pot with a push/pull switch to switch the pre-amp? Also, when measuring the drain current you might find the high impedance of some multi-meters could give a false reading. Quote Link to comment Share on other sites More sharing options...
stingrayPete1977 Posted May 17, 2017 Share Posted May 17, 2017 [quote name='RhysP' timestamp='1494970661' post='3300149'] My Jaydee Supernatural had a mini toggle switch between the volume & tone controls for the active circuit. [/quote] Yes I've seen a switch as well as the Jack just like a push pull active passive switch but they've still got the stereo Jack, leaving one on passive would stop the drain though I'd think, no such option on a genuine musicman though. Quote Link to comment Share on other sites More sharing options...
drTStingray Posted May 17, 2017 Share Posted May 17, 2017 (edited) [quote name='stingrayPete1977' timestamp='1495053244' post='3300954'] ... no such option on a genuine musicman though. [/quote] Except a Reflex, Big Al, some US Subs, one or two limited runs of Stingrays (PDN white Classic; a Guitar Centre special run - used the same stuff as the white Classic). The hang tag manual for the 70s/80s Stingrays mentioned battery drain as negligible. The change to the design was made in the 80s. Battery life of one to three years estimated according to the blurb. http://www.musicmanbass.org/mycustompage0051.htm Edited May 17, 2017 by drTStingray Quote Link to comment Share on other sites More sharing options...
stingrayPete1977 Posted May 18, 2017 Share Posted May 18, 2017 I still see musicman as stingrays only* *I still fancy a big Al 5 SSS though Quote Link to comment Share on other sites More sharing options...
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