Yamaha TRBX174EW-NT Electric 4-String Bass Guitar - Exotic Wood The TRBX174EW bass guitar features an exotic wood top, Mahogany body, Maple neck, split plus single-coil pickups and chrome hardware. This high quality, stylish bass is the perfect instrument for beginners. Natural finish. The TRBX174EW bass guitar features an exotic wood top, Mahogany body, Maple neck, split plus single-coil pickups and chrome hardware. This high quality, stylish bass is the perfect instrument for beginners. Yamaha has been making immensely popular entry-level bass guitars for decades. The TRBX174EW takes this legacy to the next level in playability, sound, comfort and quality. Natural finish.