What is the LM1778N IC and is there an alternative to it?

What is the LM1778N IC and is there an alternative to it?

Need two for this circuit:

http://www.zen22142.zen.co.uk/Circuits/Audio/quad.htm

Can't find anything about it online.

Thanks,
Edwin

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It HELPS if you use the right number !!!!
READ the diagram !
I learned something!
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Yeah. Using the correct part number helps.
http://www.alldatasheet.com/view.jsp?Searchword=LM1877
rickharris7 years ago
Now I am only guessing here as I am too tired to google the answer BUT the IS in question is the only active component is a Quad Audio amp SOooo I strongly suspect it may just be a quad audio amp.

take your pick of a lot of audio amp ICs out there.