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This is the second time in ten years that I reversed the polarity on a project and destroyed a couple of electrolytic caps. This was on the Legato. They do make a rather interesting pop when the go. I have replacements on order. Will reversing the polarity hurt anything else on the Legato. It was only connected wrong for 5 seconds.
Thanks
Jigb
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Yes, there is a very good probability the transistors are dead, but who knows you might have gotten lucky.
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Russ, it would be nice if PCBs in TPA future projects have protection diodes for power input.
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A person who doubts their wiring ability can easily put a rectifier bridge in front of the module. :) Edited by user Sunday, March 4, 2012 6:56:13 AM(UTC)
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Well I caught a break. Replaced the caps and everything works. I am feeding it from a Rega Saturn. The Buffalo III / Legato 3.1 sounds a lot better then the onboard Rega DAC. More inner detail and body. I ended up using output caps. I tried running without the ground in balanced mode. I worked but over time the Rega controls stopped working. I think the system was finding a ground through the digital side. I can't wait for the caps to break in. They are Dynamicap's which take a long time to break in. They tend to sound thin and a little grainy for at least 50 hours.
Thanks Russ and Brian for making truly high end products affordable for DIY. Hopefully you will have the USB module out soon.
John
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I am very glad there was minimal damage. I am even more glad you are enjoying it! Thanks!
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