Jetrexpro and Dracule1,
Since there is no consensus on what is "neutral" or "no effect," every comparison is with respect to some other component. I would expect Teflon to be different from other kinds of caps, so in that sense, they have a sound. In one of my linestages, the sound is a touch leaner, quite detailed and fast sounding (the zing to the treble you mention). I like the teflon caps in this application, but, I have no idea if this quality is, in any absolute sense, good or bad. In other gear, I've heard radically different sounding caps sound great, so it appears to be the specific application that matters most.
I am thinking of trying the Duelund CAST caps and inductors in the crossovers of my speakers. This would be easy to do because the crossovers are housed in separate boxes instead of being inside the speaker. I have not been tempted to perform surgery on my current amp and linestage because they were specifically designed and voiced to use some very ancient parts and I think the builder would take out a contract on my life if I tried major alterations (besides, these have transformers on all inputs and outputs and no caps at all in the signal path).
Please keep us posted on your experiments. It seems like you are doing interesting things.
Since there is no consensus on what is "neutral" or "no effect," every comparison is with respect to some other component. I would expect Teflon to be different from other kinds of caps, so in that sense, they have a sound. In one of my linestages, the sound is a touch leaner, quite detailed and fast sounding (the zing to the treble you mention). I like the teflon caps in this application, but, I have no idea if this quality is, in any absolute sense, good or bad. In other gear, I've heard radically different sounding caps sound great, so it appears to be the specific application that matters most.
I am thinking of trying the Duelund CAST caps and inductors in the crossovers of my speakers. This would be easy to do because the crossovers are housed in separate boxes instead of being inside the speaker. I have not been tempted to perform surgery on my current amp and linestage because they were specifically designed and voiced to use some very ancient parts and I think the builder would take out a contract on my life if I tried major alterations (besides, these have transformers on all inputs and outputs and no caps at all in the signal path).
Please keep us posted on your experiments. It seems like you are doing interesting things.