Anything as " fast" as SPECTRAL gear?

So far we've learned that Spectral is fast, MIT cables are slow and rolled off, and prices are too high. Anything else?

Soulution advertises 'fast' amps. My understanding is that this enables them to use large amounts of negative feedback in order to achieve low distortion. Because they are 'ultrafast' negative feedback loops, they do not degrade the sound. So says Jonathan Valin as he currently sings their praises in The Absolute Sound.

The 'fastness' (or 'slowness') of circuitry isn't something that can be picked out by ear. When distortion is low, the music sounds good. Making circuits 'faster' is just one way among many of lowering distortion.

I find it helpful to know what the designer of a particular piece of equipment is trying to achieve. Of course there is frequently some added marketing hype, but that's to be expected. The alternative is 'black box' audio- guaranteed to make your system sound better, but no idea how.