Here's what Sigma say about the DM-SG5 :
Where beautiful, natural sound meets exquisite electronics. The Sigma DM-SG5 Electro Acoustic is a mesmerising mix of two worlds. An instrument of endless wonder, this guitar allows you to experience all the qualities of an acoustic whilst reaping the benefits of Fishman Sonitone electronics. Such a responsive preamp lets you sculpt your tone to perfection and projects every note with glistening clarity. But you will never lose any of that authentic, acoustic tonal goodness. The DM-SG5 is built for dynamic, enchanting live gigs.

Crafted from Mahogany and Sitka Spruce, the body exudes resonance and crisp articulation in good measure. Lose yourself in a wonderfully wide dynamic range and let your hand slide effortlessly across the micarta fretboard and mahogany neck. The DM-SG5 begs your skilful techniques and will always ensure you can play with exceptional ease and comfort.