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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: Recommended shielding posted by M3 lover on March 9, 2025 at 08:25:46:
Which power supply do you have for your outboard phono preamp? I believe it's a JLTi phono from your Profile but those had various power supply options including a budget 'wall wart'. If the power supply is switcher it can produce 'noise' higher than the 60-Hz AC mains. If it's a switcher, upgrading to a linear power supply might help.As for noise mitigation there are a few possible solutions including mu-metal shielding (a full mu-metal box) would be best. BUT, there could be radiated noise on the power supply DC cable that can be attenuated with a ferrite choke wrapped around the DC cord as it exits the power supply and one right near its output feeding into your phono preamp.
Open inputs to your integrated amp can be capped off with metal caps. If you're running unshielded interconnects (like twisted pair Kimber KCAG or similar) I would switch to shielded interconnects.
Not actually seeing or knowing more details about your setup it's hard to say but there are a few paths you can take.
Edits: 03/12/25
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- RE: Recommended shielding - AbeCollins 10:45:01 03/12/25 (0)
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