The Martin guitar seems to be more famous for the back side of rosewood, from the classic Martin D-28 guitar, Martin D-41guitar, Martin D-42 guitar, Martin D-45 guitar, all for this Tonewood.
The mahogany of Martin D18 guitar seems to have been forgotten in the long history. I personally haven’t seen the Martin D-18 guitar for a few years. Just recently I had a chance to touch the new modified Martin D18, which suddenly changed my mind, became lighter, and the sound was too loud due to the front bevel volume!
But the stupid Martin D-28 will be fully upgraded in 2017, but the new configuration I feel is to hang the Martin HD-28V configuration! Standard front beveled beam, open retro string button, red turtle shield, but the price seems to be high.
Martin D-18 guitar
String Type: Steel
Number of Strings: 6
Body Shape: Dreadnought 14-Fret
Body Style: No Cutaway
Left-/Right-handed: Right-handed
Color: Natural
Finish: Gloss
Top Wood: Solid Sitka Spruce
Back & Sides Wood: Solid Mahogany
Body Bracing: X Scalloped
Binding: Tortoise-colored Binding
Neck Wood: Hardwood
Fingerboard Material: Ebony
Fingerboard Inlay: Old Style 18 Inlays
Number of Frets: 20
Scale Length: 25.4″
Tuning Machines: Nickel Tuners with Butterbean Knobs
Bridge Material: Ebony
Nut/Saddle Material: Bone
Nut Width: 1.75″
Martin D-28 guitar
String Type: Steel
Number of Strings: 6
Body Shape: Dreadnought
Left-/Right-handed: Right-handed
Color: Natural
Finish: Gloss
Top Wood: Solid Sitka Spruce with Aging Toner
Back & Sides Wood: Indian Rosewood
Body Bracing: Forward Shifted X brace
Binding: Antique white
Neck Wood: Select Hardwood
Neck Shape: Modified Low Oval, High Performance Taper
Radius: 16″
Fingerboard Material: Ebony
Fingerboard Inlay: Mother-of-pearl dots
Number of Frets: 20
Scale Length: 25.4″
Tuning Machines: Nickel open gear
Bridge Material: Ebony
Nut/Saddle Material: Bone/Bone
Nut Width: 1.75″