The B4-Plus AS RM begins with a lightweight swamp ash body with an open-pore finish. Swamp ash has an appealing grain pattern that complements the 5-piece Panga Panga wood and walnut neck that helps to produce a tight and defined mid-range.

The B4 Plus AS "RM" has a 24-fret, 34-inch scale neck with a roasted maple fingerboard treated in an oxygen-free oven at a high temperature. This stabilizes the wood for a bigger, bolder tone while also developing a golden-brown, vintage look.

The B4 Plus AS RM's tone relies on a pair of Bartolini MK-1 pickups--they will provide plenty of punch with a warm mid-range and transparent and brilliant highs. On board electronics include the Markbass MB-1 EQ for a natural and transparent boost without killing the organic resonance of the instrument. The double cutaway design provides access to the upper frets; Hipshot Ultralite Tuners are included.

The B4 Plus AS RM sells for $749.99 MSRP and is available in Open Pore Aqua Blue, Open Pore Trans Black, and Open Pore Burgundy Red (pictured) with black hardware and matching headstocks. Five-string models are also available.