CR4 Amber: solid maple body and neck; elegant flame maple face; ergonomic shoulder and chin rest provide comfortable, stable support, and a removable treble side bout is included for left hand position reference; solid ebony fingerboard is hand graduated for consistent string articulation; custom shoulder rest which can be formed by the player to fit the body perfectly; polar pickups - bridge-mounted piezo pickup system, sense either vertical or lateral string vibration; in the vertical mode, plucked notes are remarkably even and sustained; in the lateral mode, the pickup has unparalleled sensitivity in the direction of the bow, with more attack when plucked. Attack and decay can be effectively controlled with the Polar pickup system; active electronics with dual mode preamp - two very distinct tone qualities; additional controls include volume and individual bass EQ & treble EQ controls.