[quote name='LITTLEWING' timestamp='1450733646' post='2935404']
Here's one for ya.....
I acquired a 31 year old Westone Thunder 1A a little while ago and as it sounded and played incredibly in passive mode, I never bothered about seeing how the active circuit sounded. (okay, there was a wire off one of the two battery connectors and I couldn't be arsed soldering it on again until recently...)
Anyhoo, I chucked two (admittedly different makes, one Duracell and one perfectly working one showing nearly 9v made by VMP whoever they are). Plugged in and all was sounding absolutely bleedin' awesome.
However, 2 weeks on at rehearsal I went to switch to active and it was dead as a dead thing, totally fine in passive mode. First thoughts were 'sh*t, I left it switched on and both batteries have died', so I took them out and tested them only to find the Duracell was showing 8.9v and the VMP wierdo was showing MINUS, yes MINUS 5.7v. Turning the test leads the opposite way showed 5.7v in normal 'plus' mode.
How the heck can a battery turn it's polarity backwards??? Is it because it's (probably) a foreign jobby and made cheap inside and couldn't handle pushing it's puny 9v with a proper Arnold Schwarzenneger type batt and just screwed itself ??
Right now I'm a bit loathe to put 10 quid's worth of Duracells in if there's a strange fault in the Westone circuitry.
[/quote]Its 'charged' from the Duracell, the 5.7V will only be there off load. Just bung a couple of pound shop alkaline PP3s in, betcha it works fine, dont be tight, theyre 2 for a quid round here.