perhaps one of the best AD converter ever build ! Many mastering rooms still use it as main AD convertor. Works perfectly. Shipped on its original box and manual guide.  In very good condition expect few (very) minor scratches. The MKII provides 127dB dynamic range (without A weighing), and a consistent clean performance over the frequency range. The much improved clock scheme provides extremely low jitter with both internal and external lock. Achieving the state of the art performance required increased usage of power, with much of it converted to heat. Because of the relatively high heat dissipation, when mounted in a manner that does not provide adequate ventilation or operated in high ambient temperatures the MKII runs very hot, which can reduce its reliability.  The MKIII is a redesign of the MKII, with a strong emphasis on heat reduction. The new converter modules are housed in metal enclosures with massive heat sinks. A new MKIII motherboard incorporates all of the previous MKII revisions and is powered by a new power supply, with better control over DC voltages and power dissipation. The clock circuitry is the same as the MKII. The software is very stable and left unchanged, therefore the features are all identical to a MKII. The benefits of reduced operating temperature are even lower distortions over the whole frequency range as well as increased flexibility in mounting and range of ambient operating temperatures.  Shipped on its original box and manual guide. very good condition expect few (very) minor scratches Key Features 24 bit conversion at 96kHz, 88.2kHz, 48kHz and 44.1kHz Unequaled detail and performance True -127dB noise floor 0.00005% Total Harmonic Distortion + Noise Switchable digital soft-knee limiter, +3 or +6dB gain Precision reference meter bridge Fully programmable digital test tones for system alignment AES and word clock external synchronization 40-51kHz, 88.2kHz, 96kHz DC removal Absolute Polarity Inversion Multi-converter synchronization