Enter Sandman introduced a new, more polished Metallica rhythm sound. Hetfield's ESP through a Mesa/Boogie Mark IV with a scooped midrange and tight low end creates the punchy, percussive tone that defined the Black Album. Compared to the rawer Master of Puppets tone, Enter Sandman is more controlled, more produced, and heavier in the low end thanks to Bob Rock's production.
James Hetfield's rhythm tone broken down by album era: settings, gain structure, and how to dial it in on real amps and modelers.
The Celestion V30 and the Mesa Dual Rectifier were made for each other, up to a point. Here's the frequency reason the pairing works, exactly where it breaks down for ultra-high-gain playing, and what to put in the cab instead.
The 5150 sounds different at low volume, and there are specific reasons why. Here is the Resonance and Presence adjustment, gain structure, and effects loop trick that gets the tone back at neighbor-safe levels.