Is it save to convert XLR to RCA?


Dear Audio Gurus,

I have a Harman Kardon HD990 player, which has two outputs: RCA and XLR. I'd like to use them both. However, my amps and pre-amps all take RCA. I know of XLR-to-RCA cables. But the HD990 specs mention that RCS is a 2V output whereas XLR is 4V. Am I going to damage my amps and pre-amps by trying this?

Thanks,
Walfredo
walfredo
Granny, as shown at the bottom of this page the "xx" in the part number gets replaced with letters specifying the type of input and output connectors. For RCA in and XLR out the model Bob mentioned would be DM2-2RX.

Before ordering, though, you should call Jensen and discuss your particular application with them, to be sure that is the most optimal model for your purposes.

Regards,
-- Al
Al, I have a ground loop buzz I cannot get gid off and it is driving me out of my mind. I have tried everything. Cheaper plugs, changing IC's, isolating cables etc. My IC's are shielded .

I changed speakers and nothing else, but now a ground loop issue? Very strange. My old speakers were Soundlabs and they plugged into the wall. System was dead quiet through the speakers. My new speakers don't plug into the wall as they are not esl's. Nola Viper Reference.

With my amp only in the system and all other gear out, except speakers, the noise is gone. The cd plays no roll as I have removed it and still have the noise. When my pre is turned on - boom now the buzz. Problem is the same noise is their with my active pre or my passive pre. My passive does have an AC plug as it is the Lightspeed. My amp is the Aesthetix Atlas and my full time pre is the TRL Dude.

I don't know what to do and was thinking about trying xlr cables into the amp, thus my post above. Well it seems impossible to cure this issue. My home is new. I have 2 direct 20 amp lines for my stereo. All gear is plugged into the wall. No conditioners.

The noise is always a little louder out of one speaker. Volume plays no role.

Yikes!
Granny, wow, that's mystifying. Sounds like you've tried pretty much all of the logical things.

Cheater plugs would have broken a ground loop, if that was the cause of the problem. And the Lightspeed wouldn't be susceptible to ground loop problems, because its power supply is optically isolated from the signal path, as I understand it. And also because it has a two-prong AC plug, with no safety ground connection.

You've probably already tried this, but if not try connecting the preamp and amp to the same dedicated line, and try doing that on each of the two dedicated lines.

I assume, btw, that nothing is connected to the outputs of the amplifier other than the passive speakers. I see that the Atlas is fully balanced, so if for instance a powered sub were connected to its outputs in the wrong manner, hum problems (or worse) could result.

The only other thing I can think of is that I see there is no switch on the back of the amp to select between the RCA and XLR inputs. Perhaps therefore the RCA input is wired directly to the same circuit point as pin 2 of the XLR connector (the non-inverting XLR input signal), in which case a jumper might be needed between pins 1 and 3 of the XLR connector when the RCA input is being used. Perhaps the manual addresses that. Perhaps the EMI environment is different now that the powered electrostatic speakers are no longer present, resulting in a difference in the amount of hum that is picked up by the floating input on pin 3.

Just some wild guesses, but I can't think of any other possibilities.

Regards,
-- Al
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I tried that and no help. I have sub on the second outputs of my preamp. When I remove the sub from the system, still the same buzz.

I wonder if that shorting jumper will work? Nothing in the manual. This Jensen transformer is said to help eliminate this sort of thing? My amp may also sound better thru the xlr input?