The learning here is to check the polarity diagram on the unit and the PSU - and if necessary use a magnifying glass as the type can be tiny. When in doubt, use a multimeter - they are cheap in the long run.
Well I did It! I managed to damage my phono pre-am (sigh)
So, I managed to damage my SimAudio Moon 110lp v2!
I am embarrassed to even be posting all this but whatever, perhaps someone could learn from my mistakes.
Recently I had made a post asking for feedback on Tube Phono Stages as I have been pondering about upgrading.
But I also wanted to see if I could perhaps squeeze out more performance out of the SimAudio and hence I also inquire about SUT's and what they can do.
One other aspect that I thought may improve the performance was getting a LPS.
So, I purchased the Ifi LPS as I had read good reviews of it (that unit is fine by that way).
My SimAudio is 24vdc and I bought the Ifi 24v 2.5amp, thinking that would be the correct LPS.
It was delivered and I unplugged everything from the SimAudio.
The Ifi comes with different plug adapters but the default plug, plugged right in and I thought great, I won't have to use the adapters.
Plugged everything in and the SimAudio blue light came on but no sound!
Pugged the SimAudio back to its power adapter and all sounded fine.
Then I though, well maybe I do need to use one of the adapters and tried the correct one and same result, no sound.
Went back to the default plug and then the blue light was flashing on the Sim and just a few seconds later, a puff of white smoke!
Unplugged everything immediately but knew right away the Sim was done for.
No other damage, the Ifi is fine and I will be returning that.
But my little SimAudio is no more.
Damn! I really liked that unit and was going to keep that around for a 2ndary system.
I feel horrible. At least it's not a terribly expensive unit but I just feel like crap about the situation.
Now for sure, I am going to have to get a new Phono Stage.
I just don't understand what went wrong, power wise, I thought for sure I was getting the correct unit.
Well, I'm just ranting here and getting it out as only you guys will understand.
Thanks for listening.
Jay
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Dover, I guess I misunderstood because the wording in the owners manual is a bit ambiguous. It does say the package contains an AC supply, which to me means an external wall wart (transformer) that supplies AC at a voltage that is converted to 24VDC inside the main unit, and I went from that. But thank you for the correction. |
@allenf1963 I’d assume the OP wanted to use a linear power supply vs the standard switching supply. Linear power supplies are less prone to noise and have a more stable output. They’re generally considered better for audio applications. Looking at iFi products I’m not sure which one the OP used, but some look like regular switching PSs with noise filters, while others seem to be linear. |
Required voltage and connector polarity (if applicable) are always indicated on devices' rear panels. That Moon phono stage is no exception; if you look, it clearly says 24VDC and the little diagram shows + at the center of the connector. And that's what the ifi power supply provides out of the box? Yet it smoked the phono stage. Interesting
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- 38 posts total