Sweetwater guitar instructor Marnée August presents the Gibson G-45 acoustic-electric guitar. The G-45 Standard is teeming with gorgeous acoustic tone. Its Sitka spruce top yields a direct, punchy sound with incomparable dynamic range. Play the G-45 Standard as hard as you want — it can take it. Beyond that, you'll experience a tone that sounds like a cross between the dark warmth of rosewood and the bright, bell-like ring of maple, by virtue of its walnut back and sides.