EQ-20 Support Documents BOSS Product Catalog 2008 Forging the Future - Innovation for Creative InspirationBOSS forges into 2008 with an awe-inspiring lineup of effects, digital studios, and accessories. Guitar Effects Guidebook Vol. 20 Acoustic Products Catalog See the full line of Roland and BOSS acoustic products. EQ-20/GP-20/RC-20 Brochure (Page 1) EQ-20/GP-20/RC-20 Brochure (Page 2) Twin P Front