WB STC 650 Series

Sound Rated Access Doors

Sizes & Specifications

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Williams Brothers - WB STC 650 Series Sound Rated Access Door / Panel

The Only Sound Rated Access Panel in the Industry!

The WB STC 650 Series Sound Rated Access Door is a durable, insulated flush access panel for wall and ceiling installation that is perfect for areas where sound transmission needs to be eliminated such as multi-family buildings, schools, hospitals, apartments, and even residential use. Featuring an acoustically insulated, 20 gauge steel door and 16 gauge frame with a white baked, paintable enamel finish, the WB STC 650 is considered the best and only sound rated access door on the market. Specified by architects world-wide, this sound rated access panel is independently tested in accordance with ASTM: E1332, ASTM: E90, and ASTM: E413 with a sound rating of STC 64 with proper installation.


  • Door: 20 Gauge Steel
  • Frame & Trim: 16 Gauge Steel, 1″ Wide Flange
  • Finish: White Baked Enamel, Paintable Surface
  • Latches: Compression Latch Finished in Chrome with Cup Sealed Gasket, Keyed
  • Hinges: Continuous Piano Hinge (allows opening to 180°)
  • Insulation: Acoustical Insulation, 2 3/8″ x 1/8″ Thick
  • Gasket: Neoprene Between Door and Frame, 3/8″ Wide x 1/8″ Thick
  • Applications: Walls, Ceilings


  • Finishes: Stainless Steel, Custom Colors
  • Custom Sizes: Available on Request


WB STC 650 Features & Benefits


The WB STC 650 metal access panel is available in a variety of sizes including 12×12, 24×24 and 36×36 and more. In addition, custom sizes are available upon request. Door features radius corners, a semi-concealed hinge, keyed chrome compression latches, acoustical insulation, neoprene gasket and an exposed flange. Options include locks and gaskets plus stainless steel construction and custom colors.

Manufactured by The Williams Brothers Corporation of America. MADE IN VIRGINIA – USA.