Thinking about swapping out my Class D SDS-470C for a pair of Schiit Aegir on Magnepan LRS
for a touch more warmth, better soundstaging, detail, and depth.
Going Class-A linear amp is a good idea for what your needs are compared to what you’ve got now.
A single Aegir won’t have enough wattage for the Maggie’s 86db, and to bridge the Aegir just to get more wattage is actually taking a backward step in how they sound not bridged. Maybe a single Schiit Vidar? but they maybe don’t have the the amount of Class-A your looking for.
What you need is a linear Class-A/B high bias Class-A amp that can do at least 50watts or more at lowish costing, maybe a used discontinued Parasound Halo A23 or even new Halo A23+ if you have the funds, both are John Curl designs, up there with the best
Here’s what the going prices are like on a used Halo A23
Here is one in the US from a reputable shop, he says it's a preamp it's a poweramp