ReFX Nexus Expansion: Guitars This expansion contains 133 of the finest guitar sounds for NEXUS. The variety is enormous: bass guitars, nylon guitars, steel guitars, 12 strings, distorted lead guitars, powerchords â?“ it's your wishes come true! This expansion makes massive use of the new arpeggio-strumming feature (since NEXUS 1.4.0) and of the new mid-band EQ. As Jimi Hendrix would have said: Let's rock!