AMBICO acoustic soundproof wood doors and steel frames set the global standard for sound transmission loss. Doors and frames have been tested as an assembly and are supplied with acoustic perimeter and bottom seals. Stock acoustic soundproof wood doors and steel frames are ready for immediate shipment. Soundproof Doors are available 1 3/4″ thick from STC 33 to STC 50. Soundproof Doors are available at greater thicknesses from STC 51 to STC 56. Face veneers are available in a variety of paint grade or stain grade options including birch, oak, walnut, maple and cherry. Door edges match the veneer of the door face. Testing of acoustic door/frame assemblies by independent laboratories complies with the most up-to-date standards on the continent. Fire-rated doors are available up to 90 minutes and may be supplied in singles or pairs. Assemblies have been designed to accept readily available heavy weight builders hardware. Soundproof doors are available with acoustic glazing that is factory pre-installed. Radio frequency shielding is also available for acoustic wood doors upon request to reduce the amount of radio-frequency and/or electromagnetic energy across an opening. Additionally, bullet resistance is available in combination with acoustic resistant openings for heightened security applications.