Interconnects - better before preamp or after preamp?

If the pre out is truly balanced (to a balanced amp) the cable matters far less than from the source. 

@jumia -

     BAT VK-D5 CDP to TacT RCS 2.2X pre = KS1130 Kimber

     TT to phono pre = Tricon Analog SR

     phono pre to TacT = KS1030 Kimber

     Tact to Cary SLM 100 main amps = Tesla Apex SR*

     Tact to Hafler 9505 sub amp = Gold Eclipse 8 Wireworld

     mains speaker cables = Big Silver Oval  AP

     subwoofer cables = 8TC Kimber

     two runs of 10/3 Romex from mains box/same 20A breaker to room/Hospital Grade outlets

     outlet to Stealth XXX power conditioner  = AC Master Coupler SR*

     outlet to Hafler 9505 = AC Master Coupler SR*

     PCs to all other components from Stealth = ZU Mother

     wall to VPI SDS = stock

     SDS to tt/SAMA = Zu BOK

               *MPCs modded by Michael Spallone

                        Nothing fancy or expensive.

                                Happy listening!

If you drive a Ferrari do you put paraffin in the petrol tank? After all it's the world's best engine.

First is always the best. If it’s not preserved upstream it’s gone.

It’s all in the same chair = quality throughout.