Hi,
What is the most proper way to switch inputs keeping the best signal integrity and preventing leakage from one input to another?
- short unused inputs to ground (will this damage any source?)
- disconnect both signal and ground from unused input (this seems the best solution to me)
- leave ground on all inputs connected, switch signal only (probably will have leakage)
- leave ground on all inputs connected but 10 ohm resistor from each to ground, switch signal only
appreciate any comments!
What is the most proper way to switch inputs keeping the best signal integrity and preventing leakage from one input to another?
- short unused inputs to ground (will this damage any source?)
- disconnect both signal and ground from unused input (this seems the best solution to me)
- leave ground on all inputs connected, switch signal only (probably will have leakage)
- leave ground on all inputs connected but 10 ohm resistor from each to ground, switch signal only
appreciate any comments!
Hi,
I think the leakage you refer to (crosstalk) is mostly due to capacitance between the lines/switches.
Using a double pole relay with large gap across the open contacts to each input AND a double throw to connect both these to a separate ground could reduce the capacitance to adjacent inputs.
I would keep the used input ground as a dedicated wanted signal ground. The grounded inputs and returns could all be shorted to a common unused signal ground that separately goes to the main audio ground.
This may be an over the top solution, because most competently designed line inputs can achieve >=-80db separation without this complexity.
You will need to check each source to find if it is suitable for muting by grounding/shorting the signal line.
I think the leakage you refer to (crosstalk) is mostly due to capacitance between the lines/switches.
Using a double pole relay with large gap across the open contacts to each input AND a double throw to connect both these to a separate ground could reduce the capacitance to adjacent inputs.
I would keep the used input ground as a dedicated wanted signal ground. The grounded inputs and returns could all be shorted to a common unused signal ground that separately goes to the main audio ground.
This may be an over the top solution, because most competently designed line inputs can achieve >=-80db separation without this complexity.
You will need to check each source to find if it is suitable for muting by grounding/shorting the signal line.
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