Yes, many pre outs consist of op-amps, but like paraneer said, it all depends on the brand and models. The pre outs of some integrated amps would be superior to some separate pre-amps.
Is there something lacking in the sound you have now?
Using "pre-outs" of an integrated amp provide sound quality equal to a separate pre-amp?
Will using the "pre-outs" of an integrated to drive a basic power amp provide sound quality EQUAL to a separate quality pre-amp??
I have read that many pre-outs are just "op-amps" that channel an output signal to the amp, but are not equal to the output stage of a separate pre-amp, and therefore limit or hinder or limit the performance of the basic power amp. .
Trying to determine if it is worth it investing in a separate pre-amp for a BAT VK-200 amp
Would a quality pre-amp provide 15% to 2o% better sound?? Thanks