I almost certain that the folks building the Sherbourn stuff have been involved in the the fiasco that was the Trinnov equipped Sherwood Newcastle receiver (and its ill fated / still born prepro cousin that shall go unnamed...).
I think the current Sherbourn prepro offering is a weird marriage of some parts from the old Marantz 7005 and a certain other "entry level prepro" that some folks did not feel made sense to enable the EQ functions...

Does not give me a "warm fuzzy"...