Massimo Varini is a well-known producer, session man and teacher in Italy. He's extensively using the Kemper Profiler live.
In this video he says that the relationship between passive PUs and digital devices (or buffers) is such that changing the PUs' coiling or combination responds quite differently than when he uses a traditional amp.
In collaboration with Brunetti Amps, they designed a 1/4" and an XLR cable under the logo True Connections by QuickLock (Eko Music Group).
For those who do not understand Italian, the demos start around 4:30. If there's no tweaking whatsoever (which should be the case) the differences are quite impressive. Be sure to set quality @ 1080.
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