Equalization

The best use of tone controls (which went out-of-fashion in high-end in the 70's) is to correct for the differing balances found in recordings. The Quad pre-amps had (have?) great ones.

@geoffkait , You kill me!

The best use of tone controls (which went out-of-fashion in high-end in the 70’s)

Yes they did, but from those that have it, this now has turned the tide on those old tone controls, and from reports here on A-gon, it sound very good. And it tunes in low bass, upper bass, midrange, and treble.
http://www.schiit.com/products/loki

Cheers George

What a great product, George! It was the nature of the filters in the Quads that made them so useful---shelving vs. roll-off, etc. I'm going to look further into the

I was in the Mapleshade exhibit with Pierre and Ron Bowman with Ron’s novel amp that had no tone controls OR volume control. The volume was preset electrically and less obtrusively. The resulting sound through the Nakamichi Dragon CD System and Gallo Ref. Speakers was VERY open and dynamic and smooth. I immediately jumped off the tone control train. 🚂 🏃🏻‍♂️ I doubt tone controls are a shortcut to Xanadu.