The NJM4580 is a dual operational amplifier, specially designed forimproving the tone control, which is most suitable for the audioapplication.Featuring noiseless, higher gain bandwidth, high output current andlow distortion ratio, and it is most suitable not only for acousticelectronic parts of audio pre-amp and active filter, but also for theindustrial measurement tools. It is also suitable for the head phoneamp at higher output current, and further more, it can be applied forthe handy type set operational amplifier of general purpose inapplication of low voltage single supply type which is properly biasedof the low voltage source.The D-Rank type products(NJM4580DD/LD/MD/ED) havespecified maximum limits for equivalent input noise voltage.