Prep the pan. Preheat oven to 300°F. Grease and flour a 12-cup tube pan or Bundt pan well.
Cream the butter. In the bowl of a stand mixer, beat the butter (1 pound) on medium speed until light and fluffy, about 6 minutes.
Add the sugar. With the mixer on medium speed, gradually beat in the sugar (3 cups). Continue beating for 2 minutes, until light and fluffy.
Add the eggs. Add the eggs (6), one at a time, mixing after each addition just until the just yolk disappears.
Add the flour and buttermilk. Reduce mixer speed to low. Add the flour (4 cups) and buttermilk (3/4 cup), alternately, beginning and ending with the flour, mixing just until combined. Scrape down the bowl as needed.
Add the extracts. Mix in the almond extract (1 teaspoon), and vanilla extract (1 teaspoon) just until incorporated.
Fill the pan. Pour the batter into the prepared pan and tap the pan gently on the counter a few times to release any large air bubbles.
Bake. Bake on the middle oven rack for 1 hour 40 minutes, or until a wooden skewer inserted into the center comes out with just a few moist crumbs.
Cool. Cool the cake in the pan on a wire rack for 15 minutes. Then remove it from the pan and let it cool completely on a wire rack.