21-03-1998
13
Engineering
295 L.E.
B. S 6840 : Part 3 : 1992 ( Including Amend. 1/ 1990 & 2/ 1991 ) IEC 268- 3/ 1988 Sound System Equipment. Part 3 : Methods for specifying and measuring the characteristics of sound sysetm amplifers
New
Not Obligatory