 
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
|
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
69.3.236.192
In Reply to: RE: Easy Polarity Switching for Marantz SA-11... Would this work? posted by FidPup on July 04, 2007 at 12:35:13
Depending on how your preamp "terminates" the inputs that are not in use. The marantz might not be as happy driving the lower impedance, and it may alter the frequency response.
:-)
Follow Ups:
I use a conrad-johnson Premier Three preamp.
The Premier Three has unbalanced RCA inputs only. All unconnected inputs are connected only to the input switch, that is, are floating. The grounds of all inputs are connected to the common/chassis ground.
As long as I'm careful not to inadvertently connect one of the "hot" leads to ground I think my scheme should work!
My plan is to create a cable with a normal RCA plug at one end and an XLR balanced connector at the other end.
The RCA plug would be wired normally. The ground wire at the XLR end would be connected to pin 1 (ground), and the "hot" wire would go to pin 2 of the XLR. (Confusing, I know, but pin 2 of the Marantz is actually the inverted output!)
I would leave pin 3 (non-inverted) floating.
Since the balanced output voltage of the Marantz is exactly twice the unbalanced output voltage, My theory is that by connecting the two outputs to separate preamp inputs that I could invert polarity by simply switching between the two inputs!
Ken
As long as the unselected input is "open", then it shouldn't cause any problems.
:-)
RCA grounds for inputs on 'most" preamps are common. He should disconnect the unbalanced out from the CDP when trying the balanced. Also if the CDP uses a three prong plug their "might" be a hum issue. Too many variables to do anything but try unless he has and can read a schematic. Some players are truly balanced and some just have balanced connectors.
ET
Both the C-J Premier Three and the Marantz SA-11 have two-prong AC cords, and I've oriented both for lowest chassis potential.The SA-11 definitely has a true balanced output.
Hum should not be an issue unless there is some kind of ground loop set up between the two interconnects...
And I definitely can read a schematic! Anyone got one for the SA-11?
ken
| FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
||||||||||||||
This post is made possible by the generous support of people like you and our sponsors:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
