For sale is a late model C 390DD in very good condition, this model has the 24/96 USB card pre-installed as well as multiple 24/192 coax and optical inputs. This unit is also equipped with the optional analog line card that also offers mm/mc phono. Base unit retails for $2600, and the analog card was another $299.
This is a direct digital unit using a chip from Zetex, and is closely related to the M2 and M32 which share the same architecture. This unit uses a much more sophisticated topology than the 338/368/388 units that launched last year. The 3390dd keeps the signal in the digital domain up until the amplifiers binging posts where the upsampled pcm signal goes through a pwm gain stage which creates current to drive the speakers. This is a true digital design. This unit, as well as the M2 and M32 have received rave reviews. The 390DD can also be upgraded to incorporate BluOs through its expandable MDC card/slot architecture. (there is a bluos card listed on ebay ending 1/5)
You can go ahead and read the reviews, but in short this is an exceedingly transparent and natural sounding amplifier that offers 150 WPC, digital crossover and even digital room correction for low frequencies. It is a stunning value at 30% of its original list. This unit is still listed in the 2017 Absolute Sound best integrated amplifiers under $5000 guide. Listing includes the original NAD AVR4 remote, a printed copy of the manual and very careful packing in non factoring packaging.
I will ship flat rate for $40, which I will take a loss on. I will also accept paypal at my cost or just about any cryptocurrency that can be traded on Binance. (BTC, ETH, LTC, XRP, etc)