1. BS 6837:1987 ISO 3394:1984. Specification for Plan dimensions of rigid rectangular transport packages with a modular relationship to 1200 mm × × 1000 mm and 1200 mm × × 800 mm pallets and unit loads

2. BS 6840-1:1987 IEC 268-1:1985. Sound system equipment - Part 1: Methods for specifying and measuring general characteristics used for equipment performance - (IEC title Sound system equipment. Part 1: General)

3. BS 6840-10:1991 IEC 268-10:1991. Sound system equipment - Part 10: Methods for specifying and measuring the characteristics of peak programme level meters

4. BS 6840-11:1994 IEC 268-11:1987. Sound system equipment - Part 11: Specification for application of connectors for the interconnection of sound system components

5. BS 6840-13:1998 IEC 268-13:1998. Sound system equipment - Part 13: Listening tests on loudspeakers

6. BS 6840-14:1987 IEC 268-14:1980. Sound system equipment - Part 14: Guide for circular and elliptical loudspeakers; outer frame diameters and mounting dimensions

7. BS 6840-17:1991 IEC 268-17:1990. Sound system equipment - Part 17: Methods for specifying and measuring the characteristics of standard volume indicators

8. BS 6840-18:1996 IEC 268-18:1995. Sound system equipment - Part 18: Peak programme level meters. Guide for digital audio level meter

9. BS 6840-2:1993 IEC 268-1:1987. Sound system equipment - Part 2: Glossary of general terms and calculation methods

10. BS 6840-6:1987 IEC 268-6:1971. Sound system equipment - Part 6: Methods for specifying and measuring the characteristics of auxiliary passive elements