I hope this helps:
The Insight+ amplifiers have no overall feedback, so the input circuits simply cannot overload on an overall loop error correction signal that doesn't exist. Feedback does exist, however, as a unique active and buffered powered feedback loop matched perfectly (electrically and thermally) to the active buffered input parameters. The amplifiers are perfectly balanced top-to-bottom and also balanced in input and feedback drive parameters. You have never heard an amplifier with this capability before.
This was taken off our website. avahifi.com.
Regards,
Dean