Original NE5532 for Beresford 7520?

[theone999]

I looked on ebay, there was "NE5532, NE5532N, NE5532P, NE5532AP etc", any difference and which is originally used?

Also, some said the opamp used in fixed/variable affects the sound in headphone out, is the reverse true?

Thanks

[Robscix]

They are NE5532P, IIRC. There are two opamps used in that unit, one is for the line output and the other is for the headphones output.