Hi Jim
I would like to recommend trying the Luminous Technology Synchestra Signature interconnect cables with this system. I know the Merlins love copper but the Berning really likes silver. Maybe this is the happy medium. I think you may be surprised at what type of improvement you should realize.
Of course don't buy it, you have to try it risk free first. I'm not gonna recommend anyone buy ANY cable without a listen. I would try between the BAM and the amp first. Next between the DAC and pre.
Nice system btw :) Will

