It is a stock 2.5C with the upgraded discrete amp and the CS4398 DAC chip. I did swap out the op-amps with the LM4562...sounds great! I have the original op-amps and can swap them back or include them if needed. I bought this from a fellow head-fier a couple months ago. I'm looking to upgrade. My asking price is
$TRADED (I paid $225 and brand new this unit costs around $300) which includes CONUS shipping (USPS Priority/Insured) and Paypal fees.
Please pm me if interested. You can also check out my feedback on the FS forum.
Thanks for looking!