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108.46.182.232
Hoping someone here can save me lugging this thing to Fedex in order to have it tested by Oppo. Oppo customer service has been responsive but nothing they've suggested has fixed the problem.
To recap, the XLR connection from the BD105 to my Rogue Pharoah is wonky. It sounds like just the surrounds in a multi-speaker set-up. The problem does not always manifest at start-up but eventually there is some kind of drop out.
I've done some further diagnostics since last post. First, it is not the cables - I tried a new pair and had the same problem. Second, I do not believe it is the settings. I've made sure it is set for two channel, two speakers, no sub, stereo downmix, no trim delay. I also am fairly certain it is not the settings because I do not have the problem with playing discs through the RCA connections. Third, it is not a sacd issue, as it happens with both sacds and redbook cds.
Lastly, and this may be key, I found that when I started playing around by switching the cables around (to make sure its not out of phase), the problem does not occur with only one XLR cable connected. Upon connecting the second cable, though, the bass and midrange drops out. Seems that the two are cancelling each other out somehow.
Any thoughts? Of course, the problem could lie with the Pharoah. Unfortunately I don't have another XLR source to test.
Follow Ups:
I'm wondering if it could be an earth problem.
XLR and earthing can be complex, I think.
Potentially, the balanced output could be configured in various ways.
One way is for both signal + (pin 2) and signal - (pin 3) to be fully floating; a 4V signal could be between say 14V and 10V. The absolute voltage of the 'system' would most likely be picked up from some kind of earth connection in the receiver (preamp).
Another way is for both signal + and signal - to be related to earth in the sender (cd player). My Blacknote is like this; the signal outputs are 'linked' to earth, and this earth is connected to pin 1. The signal outputs will then be close to earth; a 4V signal will be +2V (pin 2) and -2V (pin 3). (Though pin 2 is called + and pin 3 -, both go + and -; a -4V signal will be -2V on 2 and +2V on 3).
There may be cases where say pin 3 might be earthed; I have seen references to doing this for XLR to RCA cabling (be very careful! It could blow up the source output stage).
There is potential for things to go wrong; perhaps both units may try to impose their own earth; perhaps some part of the system ends up without an earth reference. All guesswork of course but read on.
As it works OK with one cable connected, you could try breaking the pin 1 earth connection on one cable, see what happens; or try breaking both; or try (most carefully) removing the mains earth connection of the CD player, with earth connections fully connected in the cables. If you do this, NEVER power it on without signal cables connected as you'll rely on earthing via the signal cables for safety.
Some cables may have pin 1 used only to earth the sceen and not connected to pin 1 at the other end; if this is the case, try one that is fully wired.
Good luck!
Another possibility. The Oppo (I have one) is wired "Pin 2 hot." Make sure your amp is NOT wired "Pin 3 hot."
My apologies in advance if you've already checked this. Is the XLR Terminal Polarity setting on your 105 set to Normal rather than Inversion?
Just a thought.
Joe
thanks, I did check that
no worries- Rogue offers excellent customer service.
The XLR outputs on my OPPO BDP-105D work just fine!
You could isolate the problem further if you could replace the Rogue Pharaoh with a power amplifier with XLR inputs. Since the OPPO BDP-105 has its own volume control, it can drive a power amplifier directly. Do you know anyone from whom you could borrow a power amplifier?
Good luck,
John Elison
Thanks John, I don't have another balanced source, but I do have another balanced amp. I'll try that.
Volume to variable before hooking up your balanced amp make sure the volume is all the way down. I've only ever used fixed volume on my Oppo 95 which is at full volume I believe and I don't know if you make the change to variable it sets the default volume down to zero.
You probably have already thought of this but a reminder is always good. As I get older I seem to need more reminders each day.....
Oppo acquitted on all counts. Works perfectly on balanced outputs to my Class D amp. Time to email Rogue. Hopefully there is a fix that doesn't involve hauling that behemoth to Fedex for service (especially as I am not the original owner, so not under warranty).
Seems like a internal wiring issue. Try borrowing another source or amp to try. I also have a 105, works great.
AB.
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