Posted by: spopovic
floating-ground amplifiers - 28/09/2002 14:59
Can some one tell what are these F-G Amps.
I' m buying one Amp for may EMPEG MARK1 player, and I don't know wich one.
Alpine MRV-F340
or Pioneer GM-X924
Posted by: genixia
Re: floating-ground amplifiers - 29/09/2002 21:08
I suspect that floating ground amps don't have their case or signal grounds connected to power ground. This would be useful when putting one in a strange-ass car that has it's body connected to the positive battery terminal.
Posted by: altman
Re: floating-ground amplifiers - 02/10/2002 04:38
All (decent) in-car amps have floating ground inputs - anything from a name brand, definitely.
Hugo
Posted by: spopovic
Re: floating-ground amplifiers - 02/10/2002 09:36
Thank you..I'll take Alpine AMP.
Posted by: rob
Re: floating-ground amplifiers - 04/10/2002 09:32
If you're installing a Mk.1 then the first thing you'll need to do is short those floating grounds to ground using the cables supplied!
Rob
Posted by: tfabris
Re: floating-ground amplifiers - 04/10/2002 09:33
I thought it was the opposite. I thought that the cables were supposed to make non-floating-ground amplifiers work properly with the Mk1.
Have I had it wrong all along?
Posted by: rob
Re: floating-ground amplifiers - 04/10/2002 09:37
The cables simply tie the RCA plug grounds to chassis ground - i.e. they defeat the floating input of most amplifiers. This is because the Mk.1 has floating outputs - you can't float BOTH ends of the connection (at least, not usually, but since this is a black art it has been known to happen).
Rob
Posted by: tfabris
Re: floating-ground amplifiers - 04/10/2002 12:13
I guess I was misunderstanding all along. So how should
this FAQ entry be re-worded in order to be accurate?
Posted by: rob
Re: floating-ground amplifiers - 04/10/2002 17:09
Umm.. I guess you could delete it and start over!
The mechanics of the process are correct, just the reasoning is wrong. Just delete the reasoning - I'm sure most of the 350 Mk.1 owners have worked it out by now anyway.
Rob
Posted by: tfabris
Re: floating-ground amplifiers - 04/10/2002 22:42
Just delete the reasoning
Good idea. Done.