ZPA0.5 ground switches missing?

neverman · Post by **neverman** » Thu Feb 19, 2009 1:09 am

My other post reminded me of a question I've had for years...

Both my ZPA0.5's, as received from Phoenix Gold about 10 years ago, came minus their ground switches. The manual specifically calls these switches out and tells you how to use them either as fixed or floating. Well mine just have solder "nubs" on the boards. I haven't looked recently to tell if there is a shorting bar across any of the terminals. They work mostly fine. Never quite sounded as good as my originals (stolen) which I believe had the little switches installed.

Was there a revision to these amps that removed that switch? Did PG just mess up? I'm pretty sure these are version 1's due to the fans.

Oh well, I suppose it warrants a call? I'm supposed to be running a floating ground with my balanced lines, how big a difference would this make if the factory made them into perma-fixed mode which is what I expect happened? Anyone know why this may be?

Curious Minds...

Stryker · Post by **Stryker** » Thu Feb 19, 2009 5:33 am

dunno.... but nice avatar

Jim Truett · Post by **Jim Truett** » Thu Feb 19, 2009 7:14 am

V.2 eliminated the switches, had a revised PS and fan control board, as well as the 7 blade fans.

How many blades are on your fans?

freshkryp69 · Post by **freshkryp69** » Thu Feb 19, 2009 12:16 pm

what exactly did they do to the power supply? I have both versions and dont see a diff, maybey Im looking in the wrong place...same thing with the control board no diff? maybey it was the value of the parts used?

neverman · Post by **neverman** » Thu Feb 19, 2009 1:58 pm

Crap, it looked like a lot of fan blades after a couple of beers I swear. There is 7, V2's damn

So is ground select auto-detected or did they just do away with floating vs. fixed? Did they ever revise the manuals or was I checking out my V1 manuals from the stolen install maybe?

When I 1st saw that Avatar I found it oddly hypnotic. I think there is a subliminal message in there somewhere?

neverman · Post by **neverman** » Thu Feb 19, 2009 2:02 pm

So I guess I can ask here and not pollute the board too much. I have 4 fans incoming as my all are spinning weakly or not at all. How hard are the covers to get off or is it about as straight forward as the cover swap I just did to my ZPX2? Is anything connected to the shell or does it just screw off? Any "gotchas" I should be aware of?

wash with gasoline · Post by **wash with gasoline** » Thu Feb 19, 2009 3:34 pm

its been awhile since i took apart my 0.5, but i remember it being easy except the pin switch for the plexi cover being a bit tricky?