Pre-Amp for Class D Amp


My brother use a pair Bel Canto 1000M(500W@8 ohm) class D power amp to drive a pair B&W 802D speakers. He is happy with the 1000M. The pre-amp is a Bel Canto Pre3VB. He want to improve sound. Is there any suggestion a better pre-amp to match 1000M? Thanks.
jxzw
Any quality tube preamp would be an improvement. I like VAC and Manley but that doesn't mean you have to. There are lots of single ended choices, but if you want true balanced the heard thins down.
I have a Calypso tube preamp with low noise Mullard 70’s input tubes and Amperex Orange Globe output tubes. It sounds sublime with the RCA connections in the low gain mode with my NCore class D amps.

Bob
I second the tube preamp suggestions. I have partnered my REF1000Ms with a Pre3, then a Modwright LS100, then an Ayon CD5S (CDP + tube pre), an Audio Research Reference 5, then Reference 5SE.

It really complements the slightly dryer midrange of the ICE modules.
Yes, tube active, lush even, to round out stark but clear class D and detailed B&W. Maybe Conrad-Johnson. Perhaps a pre which uses 6SN7's. Cary SLP-98. Stay away from passive pre's with D class amps.