JUMBO BODY The full-size jumbo body (100*125mm) produces a huge full-bodied sound with plenty of bass and exceptional volume. SPRUCE TOP Spruce provides an ideal balance between strength and flexibility, hence its overwhelming popularity as the wood of choice for tops of acoustic guitars. Spruce’s versatile sonic character makes it ideal for a variety of musical genres and playing styles. MAHOGANY BACK & SIDES Bright yet natural with a strong and warm midrange, the beloved mahogany wood has been a standard for back and sides on premium acoustics for many decades. MMT PREAMP MMT is a 3 Band EQ with volume control function , chromatic tuner , phase and treble, middle, bass control.