Whirlwind offers rack panels in EIA 19" standard sizes from 1.75" to 10.5" high. These panels are available blank or prepunched with 10, 12, 24, or 36 holes for Whirlwind WC Series XLR, 1/4" connectors, or Neutrik D Series and a two-rack space panel is manufactured with 2, 4, or 6 Speakon or EP connector holes.
You may form enclosed units by ordering back boxes attached to the flanged rack panels listed above. Except for R-1 and PR-1, product numbers are formed by HB + panel number (e.g. HBPR-2).
These shelves are built from one piece of steel for durability, and finished with a textured baked black finish.