Discussion
I get an unacceptable hum through the speakers when I switch the amp to phono but only when connecting the turntable with phono extension cables. It’s worse when other rca cables are connected for the CD player and Apple airport, and disappears when I don’t use the extensions. I’ve tried different extensions too.
Could it be the amp? When I touch the connectors at the amp end it causes more feedback and noise.
I also bought a new turntable as thought it was originally down to the old one (and a good excuse to replace it!)
Could it be the amp? When I touch the connectors at the amp end it causes more feedback and noise.
I also bought a new turntable as thought it was originally down to the old one (and a good excuse to replace it!)
SS2. said:
More likely an issue with the turntable's earthing - a fairly common complaint with the P1, AIUI.
15 minutes Googling followed by a chat with the dealer might time well spent.
Had same issue with old turntable though when using the extension cables. Was bought from Amazon though, so no chance of speaking to the dealer unfortunately.15 minutes Googling followed by a chat with the dealer might time well spent.
Gavstar said:
I get an unacceptable hum through the speakers when I switch the amp to phono but only when connecting the turntable with phono extension cables. It’s worse when other rca cables are connected for the CD player and Apple airport, and disappears when I don’t use the extensions. I’ve tried different extensions too.
Could it be the amp? When I touch the connectors at the amp end it causes more feedback and noise.
I also bought a new turntable as thought it was originally down to the old one (and a good excuse to replace it!)
A phono input is very high sensitivity.Could it be the amp? When I touch the connectors at the amp end it causes more feedback and noise.
I also bought a new turntable as thought it was originally down to the old one (and a good excuse to replace it!)
A typical phono input has a sensitivity of 4mV and other inputs are around 200mV.
You need really, really well screened cables if trying to extend it - and said cables also need to be of very low capacitance to avoid losing treble.
Generally, it's not a good idea to use long cables.
TonyRPH said:
A phono input is very high sensitivity.
A typical phono input has a sensitivity of 4mV and other inputs are around 200mV.
You need really, really well screened cables if trying to extend it - and said cables also need to be of very low capacitance to avoid losing treble.
Generally, it's not a good idea to use long cables.
Any recommendations for such cables please? The extension only needs to be less than a metre, so not long at all.A typical phono input has a sensitivity of 4mV and other inputs are around 200mV.
You need really, really well screened cables if trying to extend it - and said cables also need to be of very low capacitance to avoid losing treble.
Generally, it's not a good idea to use long cables.
I'm actually struggling to find anything suitable.
This is an option but you'd need two...
Or this (but you'd need a couple of female > female adaptors)
ETA: You could also try routing the cable well away from mains cables and transformers - that should reduce any hum.
But cheap cables tend to be poorly screened (the screen usually doesn't cover the entire circumference of the inner conductor) and that's why they easily pick up hum fields.
This is an option but you'd need two...
Or this (but you'd need a couple of female > female adaptors)
ETA: You could also try routing the cable well away from mains cables and transformers - that should reduce any hum.
But cheap cables tend to be poorly screened (the screen usually doesn't cover the entire circumference of the inner conductor) and that's why they easily pick up hum fields.
Edited by TonyRPH on Monday 25th September 19:06
Gassing Station | Home Cinema & Hi-Fi | Top of Page | What's New | My Stuff