Please find my attachment of pictures to change IC OP-AMP with your discrete OP-AMP. It’s a Marantz CD-63SE CD Player.

The improvement is very good, its significant.

Some time later,

I just replaced the Dexa regulators with Burson series 2 regulators and now my system sounds way better; the combination (Burson regulator + Burson opamp) produces greater details , no more harsh sound and for sure better than my previous Burr Brown OPA 627

Didi – Indonesia