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Post by Barrington on Sept 24, 2019 16:28:10 GMT
I have my OPPO UDP-205 connected to my Yamaha A-S2100 amp via XLR cables , I started to get a distorted sound at low levels from some media , first off I changed over to RCA cables and the distortion went . Consulting the Yamaha manual and I have two tiny switches above the XLR sockets , I hadn't noticed these as I was using RCA s originally . One switch is Phase Selector positions Normal /Inv , checking my OPPO XLR outs and this needed to be set to Normal which it was , the other switch Attenuator Selector , positions Bypass/Att.( -6db) was set to Bypass .
The Yamaha manual says if experiencing distortion set to ATT. (-6db) and indeed it cured it.
My query is what is at fault and wouldn't I be better just going back to RCA cables ?
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Post by Stratmangler on Sept 24, 2019 22:55:45 GMT
It says in the specs that the output over XLR is double that of RCA. I'd keep on with the XLR connection - it has superior noise rejection.
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Post by MartinT on Sept 25, 2019 5:07:37 GMT
I agree with Chris.
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Post by MikeMusic on Sept 25, 2019 9:37:55 GMT
Sounds like XLR will be best.
You could always do a sound test to be sure.
Probably need a db meter though to get the volume the same
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Post by Stratmangler on Sept 25, 2019 10:42:25 GMT
Probably need a db meter though to get the volume the same Shouldn't need one. A 6dB attenuation takes the XLR output down to that of the single ended RCA output.
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Post by Barrington on Sept 25, 2019 12:33:34 GMT
A 6dB attenuation takes the XLR output down to that of the single ended RCA output.
I take it that it doesn't just reduce the volume ? |
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Post by Stratmangler on Sept 25, 2019 12:41:11 GMT
A 6dB attenuation takes the XLR output down to that of the single ended RCA output.
I take it that it doesn't just reduce the volume ? It cuts the signal level by half, so yes, it does reduce the volume. |
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Post by Barrington on Sept 25, 2019 16:33:42 GMT
I take it that it doesn't just reduce the volume ? It cuts the signal level by half, so yes, it does reduce the volume. I really meant what stops the distortion it isn't just a reduction in volume ? |
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Post by MartinT on Sept 25, 2019 16:46:47 GMT
It runs the XLR output at a lower level which prevents it from overdriving (clipping) the amp's inputs.
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Post by Barrington on Oct 1, 2019 9:58:12 GMT
Could an inferior XLR cable cause this ?
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Post by MartinT on Oct 1, 2019 11:40:49 GMT
It's more likely to be the input overloading.
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Post by Barrington on Oct 2, 2019 11:13:43 GMT
Couldn't try the better cables I'd borrowed as the plugs were too long , with my amp being so deep and already against the wall , the cheap ones I have are a good inch or so shorter .
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Post by Stratmangler on Oct 2, 2019 12:16:21 GMT
Which cheap ones do you have?
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Post by Barrington on Oct 2, 2019 17:13:58 GMT
Which cheap ones do you have? |
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Post by Stratmangler on Oct 2, 2019 17:38:43 GMT
They look to be pro grade. They should be fine.
Thomann have some XLR cables with an angled female end.
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Post by Barrington on Oct 2, 2019 17:48:16 GMT
Thomann have some XLR cables with an angled female end.
Oh right cheers Chris |
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