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Turntable hum

Hi guys,
I’ve just recently got the xdj rx2 and love the unit...had an issue with a bit of hiss in the headphones when set to mix but I later found that the mic switch was turned to on and when switched off it’s fine now sorted.What I also did is connect my turntables and noticed a faint humming noise when switched to phono....is this normal being that it’s analog or could it be the turntable.
Thanks
Matt

Matt

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Phono inputs do have more noise than line or internal sources, but if you have noticeable hum and you've already grounded the turntables to the XDJ-RX2, you may check the wiring on the headshell, or try and isolate the hum by connecting only one turntable at a time and changing the power connections (is the XDJ-RX2 power supply properly grounded as well?)

Pulse 0 票
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Yes all are grounded,but I did have a similar issue with my old djm700 a while back,but I’ll have a look at the wiring and see.....is there a possibility that my new rx could be at fault?

Matt 0 票
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I haven't had the opportunity to use one with a turntable myself, but I would expect it to be equal or superior to previous products which did not exhibit any abnormal amount of noise, hum, or hiss. There's always the possibility there is a problem, but I hope not!

Another thing to check is to test if this happens without the master outputs connected; does the hum occur internally through the headphones when monitoring the master? If you turn up the channel gain (with nothing playing) does the hum get louder?

Pulse 0 票
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Yes when I disconnect the turntables the hiss is still there and when I have each cue button pressed it does the same and it’s only the headphone volume but not the master or the channel gains.

Matt 0 票
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Sorry, you're jumping ahead of me here -- with the turntables connected, nothing playing, is there a hum through the master and/or headphone outputs?

Pulse 0 票
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Not the master....just both channel gains and the overall headphone volume....it’s not a loud hiss where it would interfere with the music but just a low hiss

Matt 0 票
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I’ve also just plugged the turntables into my xdj rx 1 and it does the same exactly so I think as you said earlier that it’s just the phono inputs making more noise than the line or other.

Matt 0 票
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I meant "does the hum also go out over the master output"? The master out and headphone each use a different quality amplifier for those outputs; obviously the headphone is a much less expensive amp and would possibly have hiss or a bit of noise, but the if the master is clean, it would be okay.

Pulse 0 票
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Yeah the master is ok so probably all good and the fact my rx 1 does the same aswell will probably mean that’s just phono inputs and how they are....cheers for you’re help anyway pulse.

Matt 0 票
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