After some serious thought, I'm selling my ART DI/O DAC. This DAC is perfect for use with a CD/DVD transport or a computer with a coaxial digital output. Very black background, excellent bass and excellent detail all describe this unit.
The following modifications have been performed:
Power supply diodes replaced with schottky type
Power supply capacitors replaced with Panasonic FC
D/A op-amp replaced with a 14-pin socket and LT1362 op-amp (an extra couple of the original TL074CN chips are also included for rolling)
Output resistors replaced with a Bessel filter for 2.3V output using Vishay/Dale RN55D resistors
Digital input resistor replaced with 75 ohm RN60D part
Output coupling capacitors replaced with Panasonic FC parts (the ART does output DC which can damage headphones)
Replaced stock green LED with superbright BLUE LED
Upgraded 3.4A AC power supply (from Hosfelt Electronics)
A/D Tube removed (but included)
Additional modifications can be made upon request.
Includes the original box, manuals, original power supply as well as upgraded unit, a pair of interconnects with RCA's on one end and 1/4" plugs on the other end.
Asking $250 shipped as configured above to the continental USA.