I’m not surprised by that given the basic pot supplied by Riviera but how do you make that work without a preamp bypass? I guess you turn the pot to full output to minimise attenuation losses.Agree - Class A is more open , airy and emotionally engaging than A/B. For complex and fast paced genres you will have more control obviously but probably lose the touch. Driving 93db Alsyvox.
As an aside - I added an icon5 passive to the levante and it’s another experience - phenomenal increase in transparency and separation. Insane value upgrade.