Kenwood / Trio basic c2 preamp opamps

> rails are quite high.....would ne5532 be ok ?

Does it have a data-sheet with rail-ratings?

> upgrading

Isn't the '5532 *older* than the '4560 and '2041 ? (Is newer always upgraded?)

Both the Phono and the Flat amp stages are heavily supplemented by discrete semiconductors. Are you sure the chip has much effect? Have you figured the loop-gain stability of the combined stages?

Are the switches and connectors actually worth "upgrade"?