I use two preamps.
I have a high quality selector to choose which pre I'm listening to.
I feed a single source to the selector and then use the selector to choose which pre.
If both preamps are on there is a pop when switching.
If only one pre is on, no pop when switching.
If both preamps are off - no pop when switching.
What's up?
I have a high quality selector to choose which pre I'm listening to.
I feed a single source to the selector and then use the selector to choose which pre.
If both preamps are on there is a pop when switching.
If only one pre is on, no pop when switching.
If both preamps are off - no pop when switching.
What's up?
DC level changes. One or both preamps probably lacks a ground resistor at the input or output (on the outboard side of the coupling capacitor).
Those grounding resistors can be of very high resistance value.
When the interconnects are in place and the source is selected/active, the very high resistance has a virtually zero effect on proper circuit operation.
I habitually use 2M2 at the output and input of all my interconnected equipment.
When the interconnects are in place and the source is selected/active, the very high resistance has a virtually zero effect on proper circuit operation.
I habitually use 2M2 at the output and input of all my interconnected equipment.
I have a high quality selector to choose which pre I'm listening to.
I feed a single source to the selector and then use the selector to choose which pre.
Just so I understand you: you mean to feed a single source to both preamps and then select the output of the preamp you want to listen to?
jan
jan.didden,
You are correct... I was not clear.
I am taking the output from a DAC that has two sets of outs.
One set of outs to each pre.
Each pre always has signal available.
Source to DAC.
DAC to each pre.
Pre 1 to A and Pre 2 to B of an A/B switch.
Output from A/B switch to power amp.
You are correct... I was not clear.
I am taking the output from a DAC that has two sets of outs.
One set of outs to each pre.
Each pre always has signal available.
Source to DAC.
DAC to each pre.
Pre 1 to A and Pre 2 to B of an A/B switch.
Output from A/B switch to power amp.
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The B1 has a DC blocking cap on the output.
Have you fitted a ground referencing resistor after that cap?
What about the output of the other pre?
Have you fitted a ground referencing resistor after that cap?
What about the output of the other pre?
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