Maxgain, my experience is not exactly applicable as it was not a test on Audio Research, but may help you.
When Counterpoint was still in business I owned the Elliott Magnum Opus Phono, an evolved version of the Counterpoint SA9. It came from the factory with the older WonderCaps with the white wrapper.
I was offered the chance to do a little experimentation for them and returned the unit three times for cap upgrades.
End result was that the newest InfiniCaps (the ones that have the rough textured surface near the lead exit), was by far the best sound.
When Aesthetix was experimenting with caps I mentioned the InfiniCap to Jim White and after experimenting this was the cap chosen for the Signature version of the Io and Callisto.
This cap and the other Aesthetix upgrades are responsible for my moving out of my old Io (and soon), my Callisto, to purchase the Signature versions.
Perhaps you already know this, but this is another Peter Moncrief design, like the TRT Wonder solder. I consider it one of the finest caps in use in high end audio.
When Counterpoint was still in business I owned the Elliott Magnum Opus Phono, an evolved version of the Counterpoint SA9. It came from the factory with the older WonderCaps with the white wrapper.
I was offered the chance to do a little experimentation for them and returned the unit three times for cap upgrades.
End result was that the newest InfiniCaps (the ones that have the rough textured surface near the lead exit), was by far the best sound.
When Aesthetix was experimenting with caps I mentioned the InfiniCap to Jim White and after experimenting this was the cap chosen for the Signature version of the Io and Callisto.
This cap and the other Aesthetix upgrades are responsible for my moving out of my old Io (and soon), my Callisto, to purchase the Signature versions.
Perhaps you already know this, but this is another Peter Moncrief design, like the TRT Wonder solder. I consider it one of the finest caps in use in high end audio.