the weighting filter 8121FT-1 (IEC-268-1) 

Description of Model-8121FT-1 (IEC-268-1)

8121FT-1 is the weighting filter made in accordance to IEC-268-1 requirement, it must linked

with either Model-8121C or 8121B made by Sunlight Electronics Laboratory, to enable it to

generate weighting noise filter that complied with IEC-268-1 requirement , for undergoing the

life testing of the loudspeaker and by defining the rated power of the loudspeaker

When using please take note that: The input signal adopts the Pink Noise, and not other

signal of noise sources.

Furthermore, the noise generated from this weighting filter also complies with the filter noise

required by the JIS C5532.