Selling Nagra flagship HD mono amplifiers. I am the original owner purchased from an authorized Nagra Dealer. They were delivered in May 2017, estimated usage approximately 150 hours. Comes complete with flight cases and all included factory accessories. Listed as 9/10 but can not find any defects and they function perfectly. Selling to raise capital for new business venture. Entire system to be sold including Nagra HD preamp. Prefer local pick-up in Florida but will ship if necessary. No PayPal for this transaction, will accept personal check, or bank wire.