The only real criticism of the Sutherland 20/20 phono preamp is it is not very dynamic. It otherwise is a great phono preamp. Read all the rave reviews on the net. Sutherland Industries has addressed this short coming by creating the Duo Mono version that has a beefed up power supply for each channel that produces all the dynamic range recorded music requires. All the attributes applied to the 20/20 apply to the Duo, plus the Duo uses many upgraded premium parts in the signal path.
This specific unit was a dealers demo and comes with a full warranty (I'll provide the original warranty receipt). This is a terrific deal - the retail price for the Duo which is never discounted is $4,000. The retail price for the 20/20 which is never discounted is $2,400. For a $500 difference you can have this superbly upgraded Duo.
This unit is like new - doesn't have a scratch, mark or dent, and performs flawlessly.
It comes with the original power cord, manual and two factory boxes with all the padding.
If you use PayPal, add 3%. If you pay by check, the Duo will be shipped as soon as your check clears.